Table of Content

25 April 2022, Volume 61 Issue 8

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Reviews

Research hotspots and academic frontiers of international food safety behavior in the 21st century

ZHANG Qin, ZUO Chan-yuan

2022, 61(8):  5-12.  doi:10.14088/j.cnki.issn0439-8114.2022.08.001

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According to the theory of bibliometrics and scientific knowledge map, using the software of CiteSpace and BibExcel, this paper studies the international food safety behavior based on analyzing the co-occurrence of keywords, co-citation of literature, co-citation of author, cooperation instutition, co-nation/region of papers in the Web of Science （WoS） database. The results showed that the number of projects funded by the National Natural Science Foundation of China （NSFC）, the total number of documents issued and the frequency of co-national/regional of China in this field were all high-ranking. But the number of prolific authors, highly cited authors, highly cited literature, highly cooperation institution of China in food safety behavior were all low-ranging. The academic influence and discourse power of China in this field should be improved. The research focuses were the consumer behavior, education of food safety, and best practices. Its knowledge base came from consumer behavior, food safety education, food waste, food traceability system.Food quality, food shortage, food supply chain, food waste, and traceability system were the academic schools in this field.

Analysis on the characteristics and trends of China's agricultural green development research：Data analysis based on CiteSpace

ZENG De-peng, MA Ying, LI Ting, ZHAO He-ping, YANG Hong-wei, YANG Tong-bo

2022, 61(8):  13-19.  doi:10.14088/j.cnki.issn0439-8114.2022.08.002

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Through the quantitative analysis of the literature, the characteristics and trends of the literature on the green development of agriculture were analyzed, and the existing deficiencies and problems were summarized, in order to find the direction of future research and development, and provide reference for researchers. Based on CNKI source journals, EI source journals, Peking University core, CSSCI and CSCD databases, 170 obtained literatures on agricultural green development were sorted, and CiteSpace5.7 R2 software was used to conduct knowledge map analysis. By virtue of the cooperation among authors and among scientific research institutions, the research situation of agricultural green development was expounded, and the hot content in the field of agricultural green development research was elaborated through the methods of keyword co-occurrence analysis, cluster analysis and time zone map analysis. The results showed that from 2002 to 2020, the research on agricultural green development had shown changes in research content from less to more, research topics from narrow to broad, and research content from conceptual to empirical. Driven by the agricultural green development policy, the future research on agricultural green development will be more concrete, and the cooperation among scholars and among institutions will be closer and closer. At the same time, it will also increase the exploration and empirical research on the agricultural green development mechanism and policy impact mechanism.

Breeding & Cultivation

Screening of medium and weak gluten wheat varieties and high yield cultivation techniques in rice stubble wheat in northern Hubei

WANG Peng, ZHANG Gang, CHEN Bin, ZHAO Yong-ping, ZOU Juan, GAO Chun-bao

2022, 61(8):  20-23.  doi:10.14088/j.cnki.issn0439-8114.2022.08.003

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Based on the selection of medium and weak gluten wheat varieties in rice stub in northern Hubei, the cultivars suitable for light and warm water conditions and coordinated high yield between rice and wheat were selected, and the suitable planting range was defined. The distribution system of high quality and weak and medium gluten wheat varieties in the main wheat producing areas of Hubei province was put forward.

Relationship of stem characteristics with lodging resistance of highland barley

CI-DAN Zhuo-ga, ZHAO Ai-xuan, LIU Qian-qian, Dolkar

2022, 61(8):  24-28.  doi:10.14088/j.cnki.issn0439-8114.2022.08.004

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In order to select excellent lodging resistant parents of highland barley, the lodging resistance of 367 highland barley core collections were evaluated by taking the folding resistance of the second internode at the base of highland barley stem as the lodging resistance index. The results showed that the varieties with different levels of folding resistance of farm varieties and bred varieties accounted for the same proportion, and the varieties with medium bending resistance were the most. The variety with the strongest lodging resistance was black highland barley （62.27 N）, the weakest was white highland barley （5.13 N）,and the two varieties were both farm varieties,the Kunlun 14 （58.77 N） was bred variety with the strongest lodging resistance（it is come from outside of Tibet）. According to the study on the internal structure and field performance of the stem,it was found that the mechanical tissue of the variety with strong bending resistance was thick and the stem was erect in the field. The farm varieties and highland barley varieties outside the region can provide excellent parents for lodging resistance breeding of Tibet highland barley varieties.

Resource & Environment

Temporal and spatial changes and its characteristics of cultivated land and grain yield in China from 2009 to 2017

QU Qun-yi, YANG Hui, ZHAO Yong-hua, HAN Lei

2022, 61(8):  29-34.  doi:10.14088/j.cnki.issn0439-8114.2022.08.005

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Based on the statistical data of cultivated land resources and grain production of China's provinces from 2009 to 2017, the center of gravity of cultivated land area and the center of grain yield in China from 2009 to 2017 were obtained by constructing the center of gravity model and grain sensitivity model, and the grain sensitivity of each province was obtained. ArcGIS 10.2 software was used to realize the spatial expression of the result data. The results showed that,the cultivated land area in China generally showed a decreasing trend. To be specific, the cultivated land area in eastern regions continued to decrease while the cultivated land area in western regions increased in fluctuation; The grain yield showed an increasing trend, the grain yield in northern regions increased year by year while the grain yield in southern regions decreased; The cultivated land area center of gravity was moving from west to north, while the grain yield center of gravity was moving from north to east. The annual fluctuation about the movement distance of the former was less than that of the latter; On the whole, the sensitivity between grain and cultivated land showed a declining trend across the country. Provinces with higher degrees of sensitivity between grain and cultivated land were mainly distributed in areas where the natural conditions were relatively poor or the cultivated land systems were fragile. At the same time, it tended to transfer to central China and some economically developed provinces. Therefore, it was necessary to adjust agricultural policies in time to better protect cultivated land resources and food security.

Hydrological simulation of VIC model in seasonal frozen soil area applicability research

WANG Hong, HE Hai, WU Zhi-yong, XU Zheng-guang, ZHANG Yu-liang

2022, 61(8):  35-41.  doi:10.14088/j.cnki.issn0439-8114.2022.08.006

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In order to explore the applicability of VIC （Variable infiltration capacity） hy drological model in hydrological simulation of seasonal permafrost region, a large-scale VIC hydrological model considering energy balance model was constructed in the basin above Fuxingbao station of Daling river as the study area. The applicability of the VIC model to hydrological simulation in the northeast seasonal permafrost region was evaluated, and a comparative analysis was made on hydrological simulation without considering the energy balance model. The results showed that the efficiency coefficient of the VIC model considering the energy balance model was above 0.63 and the relative error was less than 6.0%. Compared with the hydrological process simulation without considering the energy balance model, taking into account the energy balance model of the VIC model can better depict caused by frozen soil freezing and thawing process of runoff variation characteristics, simulation of the spatial distribution characteristics of soil water content and evaporation was more reasonable.

Study on planting suitability regionalization of apple in Yunnan province based on GIS

WU Xing-yu, YANG Lin-nan, FEI Fan

2022, 61(8):  42-48.  doi:10.14088/j.cnki.issn0439-8114.2022.08.007

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To study the suitable area of apple planting in Yunnan province, choosing apples in Yunnan province as the research object, 10 indicators in three aspects of climate, topography and soil were selected as evaluation factors from 1∶250,000 geographic information data of Yunnan province, national 90 m resolution DEM data, climate information of 109 meteorological stations in Yunnan province from 1981 to 2010 and sunshine hours and soil information of 125 counties and cities. Analytic hierarchy process was applied to evaluate the weight factor, and spatial interpolation and reclassification methods were used to derive the distribution results. The map of apple planting zones in Yunnan province was divided into the best suitable, comparative suitable, sub-suitable and unsuitable zones. The results showed that Yunnan province enjoyed great potentials for apple planting, which gave the opportunity for further growth in apple planting industry. Especially, such as Zhaotong, Lijiang, Kunming and Qujing, those areas were suitable zones for apple planting in Yunnan province, because of the large temperature difference between day and night, sufficient sunshine and abundant rainfall, they exactly provided the appropriate environment needed by the apple growth and development.

Variation characteristics of hydrogen and oxygen isotopes of precipitation and river water during summer in permafrost region of southeastern Qinghai Tibet Plateau

LI Kai, YI Peng, YING Ke-jun, XIONG Ling, LI Min-juan

2022, 61(8):  49-55.  doi:10.14088/j.cnki.issn0439-8114.2022.08.008

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Based on five precipitation samples, 25 river water samples and one lake water sample collected from July 31, 2019 to August 10, 2019, combined with meteorological data, the relationship between summer precipitation and river water isotope method and altitude, precipitation and temperature in the frozen thaw period in the southeast of Qinghai Tibet Plateau was analyzed. Meanwhile, the spatial distribution characteristics of δ¹⁸O and δD were analyzed by Kriging interpolation. The results showed that the river water volume was significantly affected by temperature in summer, and the interaction between thawed water and river water was more close, indicating that the soil freezing-thawing process played an important role in the runoff process in permafrost region.

Spatio-temporal distribution characteristics of hourly heavy rainfall in Hubei province during summer

CHEN Wei, LIU Pei-ting, XU Ying-chun, ZHANG Li, YANG Hai-peng, CAO Heng-yu

2022, 61(8):  56-61.  doi:10.14088/j.cnki.issn0439-8114.2022.08.009

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Based on the qualified hourly precipitation data of 74 national meteorological stations in Hubei province from June to August during 1983—2017, the spatio-temporal distribution characteristics of hourly heavy rainfall during summer were investigated. The results showed that the annal variation and diurnal variation of frequency during summer were nearly identical to the thresholds above 20, 30, 50 mm per hourly. The diurnal variation of heavy rainfall frequency was the characteristics of double-peak structure, which happened on 17：00—20：00 and 8：00,respectively, the continuous peak value during the evening formed a sustained active heavy rainfall period. The hourly heavy rainfall mostly occurred in the eastern part of Hubei province. With the increase of hourly heavy rainfall intensity, the high-frequency stations expanded to the west. The mesoscale convergence line or vortex on the ground under special topographic conditions was an important factor that caused the maximum frequency stations of hourly heavy rainfall. The diurnal variation of heavy rainfall frequency events with different durations showed that the high-occurrence period of short-duration heavy rainfall events was from afternoon to evening, which contained many local short duration heavy rainfall events, while the long duration heavy rainfall events were nocturnal, corresponding to the systematic heavy rainall process. There were three main oscillation modes of quasi-12 years, quasi-6 years and quasi-2 years for short duration, and one main oscillation mode of quasi-6 years for long duration. The high frequency stations of long duration heavy rainfall events were mostly concentrated in eastern Hubei, which was related to the development direction of southwest low-level jet stream in summer, while the short duration distribution was more extensive, which was related to the formation variety of local short-duration heavy rainfall in summer. The distribution of maximum frequency stations was closely related to the horseshoe topography of Hubei province, and most of them were located in the mountainous areas on the east, west and north sides of Hubei province.

Plant Protection

Efficacy and safety evaluation of 30% topramezone·nicosulfuron·terbuthylazine dispersible oil suspension agent in controlling weeds in corn field

GAN Tian, HUANG Shi, MA Dong-dong, DU Xiao-ying, LI Jun-kai

2022, 61(8):  62-65.  doi:10.14088/j.cnki.issn0439-8114.2022.08.010

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In order to clarify the field efficacy and safety of 30% topramezone·nicosulfuron·terbuthylazine dispersible oil suspension concentrate, the field efficacy test was carried out by using the stem and leaf spray method. The growth of corn and the control effect of weeds were investigated at 15 and 30 days after treatment. The results showed that 30% topramezone·nicosulfuron·terbuthylazine dispersible oil suspension agent can effectively control Echinochloa crusgalli （L.） Beauv., Digitaria sanguinalis （L.） Scop, Abutilon theophrasti Medicus and Acalypha australis L.. The total control effect against weeds at 15 days after the treatment was 90.81%~98.16%, the total control effect against weeds at 30 days after the treatment was 88.88%~97.78%, and the fresh weight control effect against weeds was 90.42%~98.82%. During the growth period, the treatment of 30% topramezone·nicosulfuron·terbuthylazine dispersible oil suspension concentrate in various concentrations was safe for corn.

Effects on corn stalk rot field control and yield of four fungicides

ZHANG Jin-ying, HUANG Rong, WANG Mei-mei, HU Ci-yin, WANG Li-xiang, LI Jun-kai

2022, 61(8):  66-68.  doi:10.14088/j.cnki.issn0439-8114.2022.08.011

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To screen effective fungicides to control the corn stalk rot, four fungicides were selected6% tebuconazole suspension seed coating agent, 350 g/L metalaxyl-M seed treatment emulsion, 25 g/L fludioxonil suspension seed coating agent and 10% azoxystrobin suspension seed coating agent. The field efficacy test of corn stem rot control was carried out by seed dressing method, and the yield was compared. The results showed that the four fungicides had apparent control effect at 2 doses, with extremely differences in different dose as the same fungicide. At the recommended high dose, the control effects of the four fungicides on corn stem rot were more than 80%, of which 10% azoxystrobin suspension seed coating had the highest control effect. The yield of 10% azoxystrobin suspension seed coating agent treated with 200 mL/100 kg seed was significantly higher than that of other treatments, reaching 14 086.67 kg/hm². In the production, it was suggested to rotate and mix pyrimethanil with the other three agents according to the recommended dosage of tebuconazole, metalaxyl-M, fludioxonil and azoxystrobin, taking the azoxystrobin as the main body, alternated or mixed with the other 3 fungicides.

Horticulture & Local Products

Comparative experiment on afforestation of tissue cultured seedlings in different families of Pinus massoniana

GAN De-yu, LIN Wu, LUO Dun, CHEN Jia-ping, WANG Yin

2022, 61(8):  69-72.  doi:10.14088/j.cnki.issn0439-8114.2022.08.012

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The comparative afforestation experiments were carried out in different locations of Pinus massoniana Ⅲ production area in Guangxi with the tissue cultured seedlings of 4 families, and the growth indexes such as height and DBH of the four-year-old stand were studied and analyzed. The results showed that the differences in site conditions at different locations had different degrees of influence on the growth traits of tissue cultured seedlings of Pinus massoniana families. The average DBH and height of tissue cultured seedling of 4 Pinus massoniana families at different afforestation sites were 4.8 cm and 3.74 m, respectively, which were not significantly different from those of Pinus elliottii seedlings. The average DBH and average height of families B and C with prominent growth performance were 4.8 cm, 6.4 cm and 3.91 m, 4.39 m, respectively, which were 26.3%, 68.4% and 7.4%, 20.6% higher than those of Pinus elliottii（CK）. The DBH and height of family C reached the fast-growing and high-yield standard of Pinus massoniana Ⅱ production area in Gangxi. Under such site conditions, the early growth effect of Pinus massoniana tissue cultured seedlings is not less than that of Pinus elliottii seedlings. The research results have important reference value for promoting the structural adjustment of regional afforestation tree species and ensuring the accurate improvement of plantation quality and benefit.

Study on cultivation technology of Agaricus bisporus with tobacco straw

MA Yun-hua, NIE Zong-ping, XU Xian-yu, XIAO Qun-ying, YOU Ping, FENG Wei-qiang

2022, 61(8):  73-76.  doi:10.14088/j.cnki.issn0439-8114.2022.08.013

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The tobacco straw was used as the test material,the tobacco straw was used to replace the corn straw, corn cob and other raw materials to cultivate the Agaricus bisporus, and effects of three kinds of material on the yield and weight of the Agaricus bisporus were studied. The results showed that the bud of the Agaricus bisporus with tobacco straw was concentrated and the first tide mushrooms accounted for more than 60%. The yield of the three tide mushrooms was above 18 kg/m². Compared with the traditional corn stalk, the total output and average weight of the Agaricus bisporus cultivated with tobacco straw increased significantly. Compared with the corn cob, the total output and average weight of the Agaricus bisporus with tobacco straw was not significantly.

Evaluation of Dendrobium plant appreciation based on entropy weight method and grey association analysis

HE Jing-sheng, ZHANG Jing-li, LIU Xiang-yu, XU Su-su, CHEN Jun-wen

2022, 61(8):  77-80.  doi:10.14088/j.cnki.issn0439-8114.2022.08.014

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The grey correlation degree evaluation and entropy weight calculation weight were used to evaluate the ornamental evaluation of 6 kinds of Dendrobium species. The results show that Dendrobium chrysotoxum Lindl. and Dendrobium densiflorum Lindl. are in the top two in terms of equal weighted correlation degree and weighted correlation degree, and have high ornamental value. The other correlation degrees are Dendrobium trigonopus Rchb. f., Dendrobium cariniferum Rchb. f., Dendrobium harveyanum Rchb. f. and Dendrobium dixanthum Rchb. f.. According to the weights of each index, 6 Dendrobium species are divided into D. chrysotoxum and D. densiflorum of the flower-viewing category, D. cariniferum, D. dixanthum of the leaf-viewing category,D. trigonopus, D. harveyanum of the stem-viewing category. This research can laid the foundation for the development and utilization of ornamental value and breeding of Dendrobium species.

Study on landscape pattern evolution and its driving factors of Yuncheng city Yanhu district

WANG Jun-jun, WANG Ling-li

2022, 61(8):  81-86.  doi:10.14088/j.cnki.issn0439-8114.2022.08.015

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Based on the Landsat remote sensing image data in 2008, 2013 and 2018, the landscape pattern index method and principal component analysis method were used to analyze the landscape pattern evolution and its driving forces in Yuncheng city Yanhu district. The results showed that the landscape pattern changed significantly from 2008 to 2018. Construction land and forest land increased by 6.40, 2.90 percentage points, respectively, cultivated land decreased by 6 092.01 hm² and grassland decreased by 4 785.21 hm². Among them, cultivated land was mainly transformed into construction land and forest land, and grassland was mainly transformed into forest land and cultivated land. Cultivated land PD increased 54.24%, LPI decreased from 24.43 to 14.31, PAFRAC increased from 1.32 to 1.35, the result indicated that the distribution of cultivated land tended to be scattered, the degree of fragmentation and the heterogeneity increased, and the degree of dominance decreased. Construction land tended to be concentrated, the fragmentation degree and the heterogeneity decreased, the dominance degree increased. In the whole study region, CONTAG decreased by 7.25%, and SHDI increased by 12.76%, PAFRAC slightly increased, the overall landscape diversity increased, the degree of fragmentation had become higher, and the landscape structure had become more complex and trended towards homogenization. Economic development, population growth, agricultural structure adjustment and regional policy were the main driving factors affecting the evolution of landscape pattern in Yuncheng city Yanhu district.

Aquatic Products

Contrastive experiment of Micropterus salmoides farmed in tank in ponds with different stocking densities

WEN Zhou-rui, HAN Yu-zhang, HE Xu-gang, YI Ai-wu, YANG Jun, LI Xiao, HUANG Jun

2022, 61(8):  87-89.  doi:10.14088/j.cnki.issn0439-8114.2022.08.016

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In order to enrich the breeding varieties and improve the breeding technology, a comparative experiment on different densities of Micropterus salmoides stocking in the tank cultivation system was conducted. Three density groups were designed for experiment, with 2 300 ind./tank（1#group）, 3 500 ind./tank（2#group） and 5 000 ind./tank（3#group） respectively. The results showed the average body weight of the three density groups reached 401.8, 377.2 and 342.9 g, respectively. The average yields of 1#group, 2#group and 3#group were 695.1, 1 078.1 and 1 316.5 kg/tank, the fish yield per unit of water body were 27.8,43.1 and 52.7 kg/m³, the production value were 23 631.7,36 656.3 and 44 761.0 yuan/tank, respectively, the profil were 2 586.6, 8 947.6 and 11 913.6 yuan/tank.

The effects of light intensity and sedimental type on Chara braunii Gmel. in morphology, pigment pattern and sexual reproduction

WANG He-yun, SUN Tong, ZHOU Yi, JIN Hui, CHEN Jun-ge, YI Chun-long

2022, 61(8):  90-94.  doi:10.14088/j.cnki.issn0439-8114.2022.08.017

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In order to investigate the interactive effects of light level and substrate type on charophyte plants, the 3×2 factorial design of light intensity and substrate type was implemented on Chara braunii Gmel. under culture conditions. Results revealed that the plant height and the ratio of chlorophyll to carotenoid （Chla/Caroten） of C. braunii on the two substrates increased significantly, while the plant ash ratio decreased with the decrease of light intensity. And the maximum dry weight appeared under 25% light treatment conditions, and the minimum dry weight was under 5% light intensity conditions. Compared to sludge substrate, planton the clay substrate had lower plant height, higher ash ratio and lower Chla/Caroten. Two-way ANOVA analysis showed that light intensity and substrate type had significant interactions on plant height, ash ratio, dry weight and pigment pattern.

Growth characteristics and rational utilization of resource of Ruditapes philippinarum in Wangjiadao sea area

SUN Jia-qi, YANG Jun, GU Hai-feng, CHEN Lei, ZHAO Zhong-fang, LI Jia-xing, YIN Zeng-qiang

2022, 61(8):  95-97.  doi:10.14088/j.cnki.issn0439-8114.2022.08.018

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In order to formulate catchable size and total allowable catch of Ruditapes philippinarum in the waters of Wangjiadao in Dalian, based on the field survey data of the waters of Wangjiadao in 2018, the length-weight formula, shell length and weight growth equation, and instantaneous mortality rate were analyzed, to calculate weight growth inflexion age, the critical age and the biomass of Ruditapes philippinarum in the waters of Wangjiadao. The results showed that the growth equation of shell length and weight were respectively L_t=58×（1-e^{-0.51×（t+0.44）}）and W_t=23.45×（1-e^{-0.51×（t+0.44）}）^{2.730 9}, and the biomass in the waters of Wangjiadao of Dalian was about 32 000 t. To Ruditapes philippinarum stock in the waters of Wangjiadao, the catchable shell length was about 36.6~37.1 mm, and catchable weight was about 6.7~7.0 g. Total allowable catch was about 13 800 t.

Animal Husbandry & Veterinary Medicine

Separation and identification of E. coli in African ostrich droppings

XU Dong-jie, WANG Jia-xiang, LI Peng, XIE Yang, PI Jin-song, WU Yang

2022, 61(8):  98-101.  doi:10.14088/j.cnki.issn0439-8114.2022.08.019

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In order to explore whether the diarrhea of African ostrich was related to E.coli, the feces of 9 African ostrich. The purified bacteria were isolated and identified by Gram staining, morphological identification and biochemical identification. The results showedthatthe growth of strain 2~9 in McConkey medium was red and wet round colony, while strain 1 in McConkey medium was white and transparent and wet round colony; Gram staining was negative, and microscopic examination showed that all of them were red bacilli; Biochemical identification showed that 9 strains could ferment glucose, mannitol, arabinose and maltose, most of them could decompose sorbitol, lactose, rhamnose, sucrose and raffinose, one strain could not ferment lactose and was white and transparent colony in McConkey medium, all strains could not utilize hydrogen sulfide, citrate, VP test of all strains urea reaction was negative, and all strains were positive in MR test and indole test. Finally, 9 strains were identified as Escherichia coli.

Study on biological characteristics of lactic acid bacteria from African ostrich

SUN Qing, WANG Jia-xiang, LI Peng, XIE Yang, ZHOU Shi-qin, WU Yan

2022, 61(8):  102-104.  doi:10.14088/j.cnki.issn0439-8114.2022.08.020

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To provide candidate strains for the preparation of probiotics, the growth characteristics, acid production performance, acid resistance, bile salt resistance and drug resistance of 3 strains of lactic acid bacteria in the feces of African ostrich （Struthio camelus） were studied. The results showed that the three strains of lactic acid bacteria （M1, M2, M3） isolated from African ostrich feces entered the logarithmic growth phase after 6 h of culture, reached the stable phase after 14 h, and the pH of the bacterial solution was stable at 4.92 after 24 h. Among them, M1 has better acid resistance; M2 and M3 have higher resistance to bile salts. The three strains of lactic acid bacteria were not sensitive to streptomycin, kanamycin and gentamicin, but were resistant to tetracycline and ofloxacin. The three strains have good biological characteristics and can be used in animal microecological preparations.

Storage & Processing

Effects of different curing methods on the quality of characteristic new tobacco variety Y28

YANG Chun-yuan, ZHANG Sheng-wei, YANG Lei, YE Ding-yong, LUO Zheng-you, WANG Yi, LIN Ying-chao

2022, 61(8):  105-108.  doi:10.14088/j.cnki.issn0439-8114.2022.08.021

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The characteristic new variety Y28 obtained from sun-cured tobacco （Maer） and flue-cured tobacco （Bina 1）, was selected as experimental material, and the effects of drying and baking methods on the main chemical components and smoking quality of tobacco were analyzed. The results showed that the drying treatment showed the characteristics of low sugar, high potassium and suitable alkali. The total sugar, reducing sugar and ratio of sugar and alkali of Y28 under baking treatment were all in the appropriate range. On the other hand, the sensory evaluation results of aroma quality, aroma quantity, eating taste, miscellaneous gas, irritancy and total scores of five qualities in Y28 were better under baking treatment than those under drying treatment. On the whole, using the baking method to cure the new variety Y28 can improve the quality.

Optimization of the ultrasonic ethanol extraction process of lignans from the cane of Schisandra chinensis （Turcz.） Baill. by the response surface methodology

MU Kai-lang, CHENG Kun-mu, WANG Jin, CHEN Jia-yue

2022, 61(8):  109-114.  doi:10.14088/j.cnki.issn0439-8114.2022.08.022

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The lignans in the cane of Schisandra chinensis （Turcz.） Baill. were extracted by the ultrasonic-ethanol method, and the ultrasonic power, ultrasonic time, ultrasonic temperature and material-liquid ratio were taken as investigation factors, and the extraction rate of lignans from the cane of Schisandra chinensis （Turcz.） Baill. was used as the response value, based on the single factor experiment, the response surface Box-Behnken was used to design and optimize the experimental plan. The results showed that the optimal conditions for the response surface methodology optimization experiment were the ultrasonic power 160 W, ultrasonic time 50 min, ultrasonic temperature 55 ℃, material-liquid ratio 1∶27（g/mL）, the extraction rate was 0.371% under this condition. It showed that the response surface methodology can better optimize the ultrasonic-ethanol extraction of lignans from the cane of Schisandra chinensis （Turcz.） Baill., and provide the theoretical basis for the industrial development and utilization of the cane of Schisandra chinensis （Turcz.） Baill. and the application of waste parts of Chinese medicinal materials.

Study on ammonia substitution modification and moisture retention properties of yam polysaccharides

BAI Jia-feng, XIONG Ya-mei, LIU Yuan-shang, SUN Yi-yan, LIU Shao-hua, JIA Xue-wei, XU Chun-ping

2022, 61(8):  115-119.  doi:10.14088/j.cnki.issn0439-8114.2022.08.023

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The yam polysaccharide was extracted by alkaline extraction and then subjected to ammonia substitution modification. The chemical structure and molecular conformations were analyzed by GC-MS analysis,fourier transform infrared spectroscopy, light scattering analysis and nuclear magnetic resonance spectroscopy. And the moisture retention properties of yam polysaccharides, ammonia-substituted yam polysaccharides and propylene glycol were compared. The results showed that yam polysaccharide was a heteropolysaccharide, mainly composed of glucose（86.1%）, mannose（9.3%）, galactose（7.2%）. The chemical chain was mainly composed of→4）-Glcp-（1→、→6）-Glcp-（1→、→6）-Galp-（1→、→3）-Manp-（1→,→2,3）-Manp-（1→ and terminal Glcp-（1→. The yam polysaccharide could be analyzed as α-1, 4-glucan by 1-D NMR. The molecular weight of the yam polysaccharide was 1.747×10⁵ g/mol, which was much larger than the molecular weight of ammonia-substituted yam polysaccharide 1.115×10⁴ g/mol. In addition, after the aminogenization modification, the polydispersion coefficient of the polysaccharide increased and the molecular weight distribution widened. The yam polysaccharide and ammonia-substituted yam polysaccharide had a certain moisturizing effect, and the moisturizing performance of ammonia-substituted yam polysaccharide was better.

Information Engineering

Establishment of forecasting and early monitoring system on wheat aphid in Hebei province based on index and model

SI Li-li, GUO Li-li, YAO Shu-ran, XIE Wen-juan, ZHAO Liang

2022, 61(8):  120-124.  doi:10.14088/j.cnki.issn0439-8114.2022.08.024

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Aphid is one of main inspects of affecting wheat production. In order to prevent and control wheat aphids scientifically and accurately, a meteorological service system was established for early warning and prediction of wheat aphids in Hebei province, based on three sets of indexes or models which were developed by the research group oneself by combining the knowledge or technology, agrometeorology, plant protection with information technology, and using GIS, VS2008、Microsoft Visual Studio 2008,C# and so on. It realized the organic combination of multiple functions, including data analysis and mining, early warning, prediction, diagnosis and knowledge retrieval, manufacture and release of service product, etc. It also had the function of transforming data of early warning about wheat aphids into a map covering geographical information.

Discoloration of aging-treated bamboo material

KANG Cheng-fang, LIU Ming-de, WEI Peng-lian

2022, 61(8):  125-128.  doi:10.14088/j.cnki.issn0439-8114.2022.08.025

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In order to study the response of bamboo color to aging treatment and provide some theoretical basis for development and utilization of bamboo. The color change of the treated bamboo slices was quantitatively tested, and CIE 1976 L* a* b* standard chroma system was used for the analysis with respect to the effect of the color of tested bamboo with different ages and stems. The results showed that the color of bamboo changed significantly from dark reddish brown to light yellow, and the brightness changed from dark to light. With the increase of treatment time, L* a* b* mainly showed a trend of the first increase and then stable, which showed a sharp increase after 8 h treatment, and a few showed a downward trend. There were significant differences （ΔE*） among bamboo ages in response to aging treatment, among the base of 4a bamboo reached the maximum 25.13 with aging treatment, while the middle part and lower part reached the minimum 17.82 and 19.01 with aging treatment. Under the condition of column, the main distribution range of yellowish blue and reddish green of different bamboo ages was not different, but the color brightness was different, especially in the middle and slightly part of bamboo. With the increase of aging resistance treatment time, bamboo color of different ages began to show obvious differences.

Establishing the traceability system data transfer model of fresh agricultural products based on IDEF0 tool

MA Zhi-yuan, SHANG Yi-yun, KONG Fan-ke

2022, 61(8):  129-133.  doi:10.14088/j.cnki.issn0439-8114.2022.08.026

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Food safety has always been the focus of our government and the public. Establishing food traceability system and eliminating information asymmetry were important means to enhance people's confidence in food safety. How to effectively record and transfer data automatically and realize forward flow and backward traceability was the core of establishing traceability system. The results showed that taking the pork product supply chain as an example, collected business information through interviewed and surveyed, described the data transferring process of the agricultural products from breeding, production, and distributions processes by using IDEF0 modeling tool, to clarify the main types of data and information transferring through each process and the internal relationships and interactions among the processes. It was to describe the information flow between each process and reduce the redundancy of data transmission, to promote the information exchange and sharing of each entity in the traceability system. It can also be used as a data optimization tool to improve the implementation efficiency and effect of the system.

Design and implementation of public meteorological service of Hunan meteorological network

LUO Dan, ZHU Hong-wu

2022, 61(8):  134-139.  doi:10.14088/j.cnki.issn0439-8114.2022.08.027

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In order to improve the public meteorological service capacity, broaden the coverage of meteorological information, and enhance the effect and experience of public meteorological services, the Hunan Meteorological Bureau has transformed and upgraded the Hunan Meteorological Network based on Internet technology. According to the needs of the public, the design of diversified and personalized meteorological service products, including short-term and short-term urban forecasts, grid forecasts, scenic spot forecasts, etc., automatically generate location-based, graphical chart-based meteorological monitoring, forecasting, early warning products, effectively improve the accuracy of meteorological services in time and space, improve the use of meteorological information, Hunan Meteorological Network has thus become the core platform of Hunan public meteorological services, meteorological disaster prevention and mitigation has important social significance.

Economy & Management

Evaluation of the coordinative development of Ankang ecological environment protection and agricultural economy coupling

ZHANG He-jing

2022, 61(8):  140-143.  doi:10.14088/j.cnki.issn0439-8114.2022.08.028

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This article used the coupling coordination degree model to analyze the coupling relationship between Ankang ecological environment protection and agricultural economic development from 2009 to 2018. The results showed that Ankang had shown a trend of integrated development in terms of ecological environmental protection and agricultural economic development, and had gradually developed from barely coordination to current good coordination. The protection of the ecological environment promoted the development of the agricultural economy, and there was no decline in the development of the agricultural economy due to the increase in agricultural non-point source pollution control, forest coverage, ecological protection investment and so on. However, Ankang's ecological and environmental protection tasks were still arduous, and some suggestions were made accordingly.

Research on forestry input-output efficiency in China from the perspective of circular economy： Based on the empirical analysis from interprovincial panel data

SONG Jiang-hao, ZHANG Wei, ZHUANG Ying-xing

2022, 61(8):  144-150.  doi:10.14088/j.cnki.issn0439-8114.2022.08.029

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Based on the forestry input-output panel data of 30 provinces （autonomous regions and municipalities） in China from 2006 to 2017, the non-radial SBM model and the Malmquist index model were used to statically and dynamically measure its input-output efficiency. The results showed that the development level of forestry circular economy efficiency in China from 2006 to 2017 was uneven among regions, showing a significant stepped regional imbalance; China’s forestry was changing from “extensive growth” to “intensive growth”, and technological progress had become the main driving force for the increase of total factor productivity; The education level of forestry staff and the proportion of tertiary forestry industry could effectively promote the growth of all elements of forestry, while the proportion of secondary forestry industry and the area of ​​forest rodent pests and diseases could inhibit all elements of forestry. Finally, it was put forward that the future development should strengthen macro-control to promote coordinated development, implement innovation-driven to promote the development of forestry intensive, rely on modern technology to improve the level of forestry disaster management, organize regular training to improve the professional skills of grassroots personnel.

Study on the balanced of the integrated section price of agricultural land expropriation：Taking the Yanbian Korean Autonomous Prefecture of Jilin province as an example

ZHANG Ying, LI Shu-jie, XU Ming-chong

2022, 61(8):  151-157.  doi:10.14088/j.cnki.issn0439-8114.2022.08.030

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The overall balance of integrated section price of agricultural land expropriation in Yanbian Korean Autonomous Prefecturewas analyzed, the hierarchical linear interpolation method was used to analyze the external overall balance of land price, and the spatial correlation between calculation land price and interpolation land price was analyzed by using Geoda software. The results showed that the difference between the comprehensive balanced land price and the interpolation land price of each level was small in Yanbian Korean Autonomous Prefecture,the land price formulation was more reasonable,which was consistent with the location status of all cities and counties, and could reflect the principle of “same land and same price” of land expropriation compensation, and ensure the smooth transition of of land prices in all cities and counties.

Discussion on the mode of economic modernization construction in new countryside

SUN Quan-sheng

2022, 61(8):  158-162.  doi:10.14088/j.cnki.issn0439-8114.2022.08.031

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The modernization of the new rural economy needs to be based on regional characteristics, improve infrastructure and government control methods, and choose appropriate roads and development models based on natural, social, and economic conditions. Economically, the modernization of the new rural economy needs to be established on the basis of market mechanisms, rationally lay out the industrial structure, promote the rational allocation of production factors, improve the cultural skills of migrant workers, and promote the scale of township enterprises;Politically, the modernization of the new rural economy should strengthen the innovation of various rural systems, reform the household registration system, land system and social security system, promote the process of urban-rural integration, improve the political status and civilization awareness of farmers, and promote the process of urban-rural integration.

The influence of the loan funds availability on farmers’ land circulation behavior

MENG Yang

2022, 61(8):  163-168.  doi:10.14088/j.cnki.issn0439-8114.2022.08.032

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Through hierarchical random sampling method, based on the survey datas of 947 rural residents in Sichuan, Shandong, Henan and Guangxi province, the binary Logit regression model and entropy balance method were used to explore the impact of the availability of loan funds on land rental and rent in. The results showed that the higher the availability of loan funds, the more conducive was to promote land circulation for farmers. The availability distance of loan funds within 3 km could help farmers rent land, and vice versa. The availability of loan funds had little impact on the rental of land by rural residents. Some policy suggestions were put forward, including orderly promoting the rational distribution of network of formal load institutions, guiding the standardized development of informal load funds, and building a load fund platform for rural land circulation.

Research on the development level of agricultural products logistics in Shandong province based on factor analysis

WEI Shu-lei, WANG Hong-zhi

2022, 61(8):  169-173.  doi:10.14088/j.cnki.issn0439-8114.2022.08.033

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Based on the rural economic development level, rural logistics development level and informatization level,the evaluation model for the agricultural product logistics development level of each city in Shandong province was constructed. The logistics development level of each city in Shandong province was comprehensively evaluated by factor analysis. It was found that the regional development of agricultural products logistics in Shandong province was strong, and the development level of each city was different. And using cluster analysis, the 16 cities in Shandong province were divided into four categories according to the comprehensive development level of agricultural products logistics,targeted suggestions that promoting the logistics development level of agricultural products in various regions were put forward.

Research on the coupling coordination of agricultural modernization and agricultural insurance in Jiangsu province

LIU Xiao-min, WANG Yu

2022, 61(8):  174-178.  doi:10.14088/j.cnki.issn0439-8114.2022.08.034

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The evaluation indicators of agricultural modernization and agricultural insurance development in Jiangsu province were established. Based on the statistics of agricultural modernization and agricultural insurance evaluation indicators in Jiangsu province in 2017, the coupling coordination of agricultural modernization and agricultural insurance in Jiangsu province in 2017 were analyzed by using the coupling coordination model. The results showed that in 2017, the agricultural modernization development index in most areas of Jiangsu province were in the medium to lower level, agricultural insurance development level were higher, the agricultural modernization and the agricultural insurance development degree were in the medium level, agricultural modernization and agricultural insurance coordination degree were higher, agricultural modernization and agricultural insurance coupling coordination degree were in primary coordination degree. It was suggested that the agricultural modernization level in Jiangsu province should be further improved, the development of agricultural insurance should be actively promoted, so that agricultural insurance could play a greater role in the process of agricultural modernization.

Study on sales channel selection behavior of jujube farmers in characteristic agricultural products advantage area

SHI Hui-jie, SHI Jing

2022, 61(8):  179-183.  doi:10.14088/j.cnki.issn0439-8114.2022.08.035

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Based on the questionnaire survey data of 436 jujube farmers from 23 companies of 8 regiments in Alar city of the first division, this paper used factor analysis and Logistic empirical model to study the marketing channel selection behavior of jujube farmers and its influencing factors. The results showed that family resources was an important factor affecting the sales channel selection of jujube farmers. Behavioral ability was the key factor affecting the sales channel selection of jujube farmers. Product factors, channel factors and economic income factors had a significant impact on the sales channel selection of jujube farmers. Social factors and agricultural subsidies had no significant impact on the sales channel selection of jujube farmers; Tanan tank farm was more suitable for planting jujube, and jujube farmers prefer to choose contract sales mode.

Measurement and evaluation of green development efficiency based on DEA-Malmquist index model： Taking Gansu province as an example

LI Jin-hong, ZHU Xue-yu

2022, 61(8):  184-191.  doi:10.14088/j.cnki.issn0439-8114.2022.08.036

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The entropy method, DEA model and Malmquist index model were used to calculate the green development efficiency and the change index of total factor productivity in Gansu province from 2013 to 2019. The results showed that the environmental cost of Gansu province was decreasing in general, and the regions with relatively high environmental cost were the regions with relatively advanced industrial development and relatively developed economy, and the slow economic growth in these regions was due to the remaining extensive development mode; Gansu province had not fully utilized science and technology and scale effect, and the level of green development efficiency was generally low, so it was urgent to optimize resource allocation; Lanzhou, Jiayuguan, Jinchang and Baiyin should promote scientific and technological innovation and scale to promote regional green development. Longnan, Dingxi, Qingyang, Zhangye had basically achieved the coordinated development of ecology and economy, and should formulate industries suitable for their own development according to local conditions, such as characteristic tourism, animal husbandry and characteristic agriculture. Wuwei, Jiuquan, Tianshui, Pingliang should accelerate scientific and technological innovation; The total factor productivity in Gansu province was fluctuating and declining, and the progress of science and technology was the main reason to promote the development of total factor productivity, and the utilization efficiency and scale benefit of science and technology had not contributed enough to the total factor productivity.

Study on the abandoned behavior of cultivated land and its influencing factors of different types of farmers：Taking Yigangchuan town, Tongwei county, Gansu province as an example

LIU Pan, XU Yan, ZHAO Xiao-ming, LYU Yin-xia

2022, 61(8):  192-196.  doi:10.14088/j.cnki.issn0439-8114.2022.08.037

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Using the research method of multiple linear regression, the abandoned behavior of cultivated land and its influencing factors of different types of farmers were explored. The results showed that there were differences in cultivated land abandonment behavior and its influencing factors among different types of farmers.The proportion of abandoned land was the highest and the area of abandoned land per household was the largest in the transformation type, while the proportion of abandoned land was the lowest and the area of abandoned land per household was the smallest in the production type; The total area and the quality of cultivated land had similar effects on each type of farmers, the more the total area of cultivated land and the worse the quality of cultivated land,the larger the abandoned area; Road conditions and natural disasters generally had less impact on the cultivated land abandonment of each type of farmers.

Research on the development of farmers' specialized cooperatives in Shangluo city based on fuzzy comprehensive evaluation

LEI Na, REN Nan, ZHANG Hong-xia

2022, 61(8):  197-199.  doi:10.14088/j.cnki.issn0439-8114.2022.08.038

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Through the field investigation and expert exchange, on the basis of expert feedback and survey data analysis, 23 specific evaluation indexes were set up from 6 aspects of infrastructure, human capital, brand value, technical service, market factors and government decision-making, which constituted the evaluation index system of the development of farmers' professional cooperatives in Shangluo city. The fuzzy comprehensive evaluation method was used to evaluate the development of farmers' professional cooperatives in Shangluo city. The results showed that the membership degree of the better development of farmers' professional cooperatives in Shangluo was 0.388 7, and the membership degree of the good development was 0.444 8. It showed that the overall development of farmers' professional cooperatives in Shangluo showed a good trend, and put forward some countermeasures and suggestions to promote the development of farmers' professional cooperatives in Shangluo city.

Rural Revitalization

Research on agricultural science and technology policy in the process of implementing rural revitalization in characteristic industrial areas：Taking Enshi autonomous prefecture, Hubei province as an example

ZHANG Shu, XIANG Jun, LI Wei-dong, XIANG He-long, QU Yong, HU Bai-shun

2022, 61(8):  200-203.  doi:10.14088/j.cnki.issn0439-8114.2022.08.039

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The development of characteristic industries was an important starting point for accelerating the structural reform of the agricultural supply side and implementing the strategy of rural revitalization. It had important practical significance for realizing the high-quality development of the regional economy and society. In order to promoted the innovative development of characteristic agriculture, it was necessary to strengthen the introduction of technology and management methods of agricultural production, broken the traditional agricultural production mode, and used technology to promote agricultural development. Taking Enshi prefecture of Hubei province as an example, this paper investigated the current technology policies in Enshi prefecture, and the bottlenecks in the implementation of related policies, and put forward countermeasures and suggestions.

Exploring ways for cultural industries to help rural revitalization——Cases and experience from Guangxi

TU Shu-ying, HUANG Su-xin

2022, 61(8):  204-209.  doi:10.14088/j.cnki.issn0439-8114.2022.08.040

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Under the background of rural revitalization, this paper analyzed the cases of “Three Jing Islands”, Bama Yao Autonomous county and Jiuzhou village in Guangxi, and summarized the “intangible heritage+tourism” cultural and tourism integration assistance model, the “longevity culture+” multi-business development assistance model, and the “hydrangea culture+base-based” base production assistance model. Explored the realization path of cultural industry to helped rural revitalization, so as to provided reference and suggestions for the development of rural revitalization in ethnic areas.

Empirical analysis of the coordinated development of rural population, resource and environment under the background of rural revitalization：Taking Hebei province as an example

ZHU Xiu-jie, ZHANG Jia

2022, 61(8):  210-215.  doi:10.14088/j.cnki.issn0439-8114.2022.08.041

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Taking Hebei province as an example, based on the coupled coordination degree model, the principal component analysismethod was used to analyze the coordinated development level of rural population, resource and environment in Hebei province in the past 10 years from 2010 to 2019. The results showed that the coordinated development degree of rural population, resource and environmentin Hebei province showed a downward trend first and then an upward trend, changing from a severe imbalanced decline type to a higher-level coordinated development type. The development of population subsystem was rising steadily, and the resource and environment subsystem was in a fluctuating upward state. The overall trend of coordinated development was good, but it was still in the primary coordinated development type. Therefore,the rural development of Hebei province should coordinate the balanced development between the systems of population, resource and environment, so as to lead the rural construction in the new era with coordinated development.

Research on sustainable development path of Leshan rural tourism in the post-epidemic era

GE Jing, WANG Lin

2022, 61(8):  216-221.  doi:10.14088/j.cnki.issn0439-8114.2022.08.042

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In response to the huge impact of corona virus disease 2019 on tourism,taking six key rural tourism villages in Leshan city as the research object, the network comments of its core tourist attractions were collected, and all the negative comments were screened out, sorted out and analyzed. The results showed that the rural tourism in Leshan city had some serious problems, such as serious homogeneity of tourism products, weak brand awareness and lagging infrastructure construction. It was proposed that Leshan city should stand on its own, taking the opportunity of rural revitalization and the change of tourists' consumption concept in the post-epidemic era, the sustainable development of rural tourism can be promoted through scientific planning, enriching business forms, cultivating brands, improving services and constructing guarantees.

Analysis on the realization form of rural collective economy from the perspective of rural revitalization：Based on Hefei city, Anhui province

SHEN Jie, LI Guang-mei

2022, 61(8):  222-225.  doi:10.14088/j.cnki.issn0439-8114.2022.08.043

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Under the background of rural revitalization, comprehensively deepening the reform of rural areas and taking the reform of collective property rights system as the key entry point to revitalize rural collective economy play an important role in exploring the new operation mechanism of collective economy and promoting the redevelopment of rural collective economy. Rural collective economic development in Hefei city achieved certain success. Based on the different conditions of collective economic development, the path and mode of rural collective economic development are different. Based on the analysis of the realization form of rural collective economy in Hefei city, this paper puts forward that the rural collective economic organizations and village committees should play their respective roles, further deepen the reform of collective property rights system, locate the difference of resources, develop the idea of collective economic development and improve the income distribution mechanism to develop and strengthen the collective economy, promote the development of rural economy and realize the well-off society in an all-round way on schedule.