Top Read Articles

Published in last 1 year |

In last 2 years |

In last 3 years |

All

Please wait a minute...


For Selected: Download Citations EndNote Reference Manager ProCite BibTeX RefWorks Toggle Thumbnails

Select

Research progress in crop disease and pest identification based on deep learning LI Zheng, LI Bao-xi, LI Zhi-hao, ZHAN Yi-fang, WANG Li-hua, GONG Qi HUBEI AGRICULTURAL SCIENCES    2023, 62 (11): 165-169.   DOI: 10.14088/j.cnki.issn0439-8114.2023.11.029 Abstract （603）      PDF （1570KB）（546）       Knowledge map    Save In order to effectively prevent and control crop diseases and pests, and ensure crop health, rapid and accurate identification of crop diseases and pests was a prerequisite for effective prevention and control.A review was conducted on the research on crop pest and disease identification, summarizing the development process of crop pest and disease identification methods. The focus was on analyzing the network structure, modeling key links, and six typical architectural features of deep learning. Combined with current research hotspots and application prospects, prospects were made from the construction of public datasets, integration of multiple imaging technologies, and optimization of large model performance. Reference | Related Articles | Metrics

Select

Spatial evaluation of village streets and lanes under the Great Heritage Relic Protection——A case study of Jiangwudian Village in Xi'an City ZHANG Dan, FENG Yan, ZHANG Ling, WANG Dong-meng, KONG De-zheng HUBEI AGRICULTURAL SCIENCES    2023, 62 (5): 112-117.   DOI: 10.14088/j.cnki.issn0439-8114.2023.05.020 Abstract （505）      PDF （5942KB）（432）       Knowledge map    Save Taking Jiangwudian Village in Xi'an City as the research object and taking into account the conservation policy of the Great Heritage Relic Protection and related planning, the corrected axes were imported into Depthmap X software based on the theory of spatial syntax, and quantitative analysis was carried out on the connection value, integration, selection and comprehensibility. The results showed that the spatial permeability of Jiangwudian Village was weak due to the concentrated layout of houses and the villagers' focus on overall living and transportation; the villagers' daily travel was restricted due to the development of public transport, which resulted in a poor overall integration degree and a high local integration degree; the overall selection degree of the village was low, which had a great influence on the external reception potential of the village; the comprehensibility of villages was low, and it was difficult for outsiders to perceive and understand the structure of villages. The public service facilities of the village needed to be improved, the function of the spatial nodes of the village should be strengthened, a comfortable and pleasant local green space should be created in the context of the Great Heritage Relic Protection, and the accessibility and traffic guarantee function of the village should be improved, so as to provide a suitable spatial environment for the future development of the village. Reference | Related Articles | Metrics

Select

Effects of different female-male ratios and feeding density on spawning capacity and hatchability of Coccinella septempunctata LIU Ting, LIU Dong-yang, TIAN Shui-sheng, YU Jia-min, WANG Yong, JIANG Lian-qiang, GUO Shi-ping, LI Bin, WU Xing-long, XIAO Ke-jun, LIU Hong-ling, PU De-qiang HUBEI AGRICULTURAL SCIENCES    2023, 62 (7): 69-72.   DOI: 10.14088/j.cnki.issn0439-8114.2023.07.012 Abstract （449）      PDF （1618KB）（160）       Knowledge map    Save Using Aphis craccivora K. as the diet, the effects of different female-male ratios on the laying capacity and hatchability of Coccinella septempunctata under the same feeding density were studied. And using the ratio of 3∶1 as the preferred female-male ratio, the effect of raising Coccinella septempunctata of different densities in a 1 000 mL container on its spawning volume and hatchability was studied. The results showed that spawning volume by Coccinella septempunctata was significantly higher when the female-male ratios were 1∶1, 2∶1 and 3∶1 than those of 4∶1 and 5∶1. With a female-male ratio of 3∶1, the spawning volume of 9 females and 3 males in a container of 1 000 mL was significantly higher than that of 3 females and 1 male, 6 females and 2 males, 12 females and 4 males, 15 females and 5 males. The female-male ratios and the feeding density had no significant effect on hatchability. Reference | Related Articles | Metrics

Select

Research on short video content marketing for agricultural products based on SICAS model LIU Huan-yi, XIU Jian-xin, NIU Shan-bin, CHEN Xiao-feng HUBEI AGRICULTURAL SCIENCES    2023, 62 (7): 240-246.   DOI: 10.14088/j.cnki.issn0439-8114.2023.07.039 Abstract （433）      PDF （1580KB）（632）       Knowledge map    Save Short video content marketing of agricultural products has more prominent advantages than traditional agricultural marketing in terms of duration, content, interactive participation and emotional mobilization, but many problems have been exposed during the practice of combining. The article aimed to provide reference for improving short video content marketing for agricultural products, insisted on content as the core and customer-oriented strategy, and proposed five levels of short video content marketing strategy for agricultural products with reference to SICAS model, that was building a demand perception network with wide coverage and fast response; enriching the production channels of agricultural products short video heterogeneous content; determining the differentiated positioning based on platform characteristics, and relying on platform channels to connect with users; expanding sales channels based on platform selection, and optimizing shopping experience; actively guiding users to share their experience,and doing a good job of word-of-mouth marketing. Reference | Related Articles | Metrics

Select

Relationship between millet yield and rainfall as well as its main agronomic traits NIU Yin-ting, CHEN Pei-yu, JU Le, QIANG Xue-jie, YU Xing-jian, YIN Zhi-gang HUBEI AGRICULTURAL SCIENCES    2023, 62 (5): 1-4.   DOI: 10.14088/j.cnki.issn0439-8114.2023.05.001 Abstract （387）      PDF （1625KB）（206）       Knowledge map    Save Based on the field performance of millet （Setaria italica Beauv.） variety Yugu 18 in Nanyang City, Henan Province in the past five years, the relationship between rainfall and millet yield was studied. The influencing factors of millet yield were analyzed by correlation analysis and principal component analysis in order to provide a scientific basis for high-yield cultivation techniques of millet in Nanyang City. The results showed that the factors affecting millet yield from large to small were rainfall, ear grain mass, single ear mass, ear diameter, ear length, 1 000-grain weight, growth period, sunshine hours, grain emergence rate, plant height and number of ears. Among them, the yield was negatively correlated with rainfall, 1 000-grain mass, growth period and plant height, and the correlation with rainfall reached a significant level （P<0.05）; the yield was positively correlated with other indicators, and the correlation with ear grain mass and single ear mass reached a significant level （P<0.05）. Rainfall was negatively correlated with the main agronomic traits of millet such as single ear mass, ear grain mass, ear length and ear diameter. When rainfall was high, the agronomic traits such as ear mass, ear grain mass, ear length, and ear diameter became smaller, and disease such as millet blast, and bacterial brown streak disease was severe, ultimately leading to lower yields. Therefore, a plot or hilly slope with high terrain, flat terrain and waterlogging resistance should be chosen when planting millet in Nanyang City. It is necessary to prevent millet blast and bacterial brown streak disease in years with high rainfall. Reference | Related Articles | Metrics

Select

Analysis on resource input and economic benefit of rice and crayfish co-culture in different ecological regions ZHANG Wen-yu, DAI Ran-xin, CHEN Song-wen, LI Zhun, CAO Cou-gui, WANG Jin-ping HUBEI AGRICULTURAL SCIENCES    2023, 62 (7): 1-6.   DOI: 10.14088/j.cnki.issn0439-8114.2023.07.001 Abstract （380）      PDF （1756KB）（254）       Knowledge map    Save In 2018, a questionnaire survey was conducted among typical farmers in Eastern Hubei Province along the Yangtze River Plain, hilly land of north central Hubei Province and the Jianghan Plain. And Cobb-Douglas production function was used to evaluate the resource utilization and economic benefits of the rice and crayfish co-culture model in these three regions. The results showed that there were differences in resource input structure, economic output and benefits in three different ecological areas of Hubei Province. The results of Cobb-Douglas production function showed that the main factor affecting the economic benefits of paddy fields in Eastern Hubei Province along the Yangtze River Plain was the input of circulating capital,and fertilizer input was negatively correlated with rice equivalent yield. There was a significant positive correlation between planting and breeding years and economic benefits of rice and crayfish co-culture in Jianghan Plain（P<0.05）. Reducing labor input and increasing mechanization level could significantly improve the equivalent yield of rice in hilly land of north central Hubei Province. Compared with hilly land, the water resources utilization efficiency and mechanization in plain areas was high, and the investment of working capital had a significant impact on increasing economic benefits, which was more suitable for the development of rice and crayfish co-culture. Moreover, through reasonable regulation of resource investment and capital investment, the impact on the environment could be reduced or avoided while ensuring economic benefits. Reference | Related Articles | Metrics

Select

Effects of environment on the artificial breeding of Charybdis feriatus and the growth of juvenile crab ZOU Xiong, YANG Ming-qiu, PU Li-yun, LU Jian-xue, XIA Lian-jun, LIU Xin HUBEI AGRICULTURAL SCIENCES    2023, 62 (8): 140-143.   DOI: 10.14088/j.cnki.issn0439-8114.2023.08.022 Abstract （375）      PDF （3315KB）（108）       Knowledge map    Save The impact of the current aquaculture environment on the artificial reproduction and juvenile crab growth of Charybdis feriatus was studied, and the breeding density test, bait test and shelter test were conducted. The results showed that, ①the weight of Charybdis feriatus juvenile crab in each stage increased first and then decreased with the increase of breeding density. In the second stage, the weight of D2 group juvenile crab was the largest, indicating that the breeding density of 150 per square meter could ensure the normal development of juvenile crab weight; ②The biological feed feeding group had the lowest body weight of Charybdis feriatus juvenile crab, while the mixed feed feeding group had the highest body weight of Charybdis feriatus juvenile crab. The biological feed feeding group had the lowest shell width and length, and the survival rate of Charybdis feriatus juvenile crab was inversely proportional to the incubation period of the juvenile crab; ③There was a significant difference in the body weight of Charybdis feriatus juvenile crab between different shading test groups. The S1 and S3 groups of Charybdis feriatus juvenile crab had higher body weight values. Under the condition of no shelter, the body weight value of the Charybdis feriatus was the lowest. Reference | Related Articles | Metrics

Select

Changes of water and salt transport and soybean yield in saline-alkali soil under ridge cropping and plastic film mulching LIANG Xin-shu, ZHANG Kai, LIAN Xiao-juan, WANG Yan, XUE Zhu HUBEI AGRICULTURAL SCIENCES    2024, 63 (6): 1-4.   DOI: 10.14088/j.cnki.issn0439-8114.2024.06.001 Abstract （372）      PDF （1651KB）（90）       Knowledge map    Save The field experiment of summer sowing soybean [Glycine max （L.） Merr.] was conducted in the moderate saline-alkali soil area of Huanghua City, Hebei Province. Four treatments, namely flat sowing （control treatment）, flat sowing with plastic film mulching, ridging planting, and ridging planting with plastic film mulching, were set up to study the effects of ridge planting and film mulching on soil water and salt transport and soybean yield. The results showed that compared with the traditional flat sowing, flat sowing with plastic film mulching had no significant effect on soil water and salt transport and soybean yield, while ridge planting could significantly change soil water and salt distribution. When the rainfall began to decrease in the middle and late stages of soybean growth, in ridge planting and planting the furrow would produce the effect of superimposed rainwater harvesting, significantly increase the soil water content of 0~20 cm and 20~40 cm in the middle stages of soybean growth, slowe down the process of returning salt to the surface layer at the late growth stage, effectively reduced the salt content in the surface layer of soil, promote the growth and yield of soybean to a certain extent, and increase the yield by 27.2%. The effect of ridge planting with plastic film mulching was similar to that in ridge planting, and the effect of plastic film mulching was not significant in this experiment. The research showed that ridge planting technology could be used as one of the important agricultural measures for summer soybean planting in coastal saline-alkali soil. Reference | Related Articles | Metrics

Select

Effects of different densities of Pelophylax nigromaculatus on rice yields and soil fertility in paddy fields LI Xing-hua, CHEN Zhan-peng, CAI Zheng-jun, ZOU Cai-qiong, ZHANG Zhong-nan, ZHANG Wen-chao, DING Feng-ju HUBEI AGRICULTURAL SCIENCES    2023, 62 (5): 5-7.   DOI: 10.14088/j.cnki.issn0439-8114.2023.05.002 Abstract （369）      PDF （1641KB）（150）       Knowledge map    Save In order to optimize the fertilization technology of rice in rice and frog co-cropping mode, a field experiment was conducted with 4 densities of Pelophylax nigromaculatus, and the effects of different densities of Pelophylax nigromaculatus on rice yields and soil fertility in paddy fields were analyzed. The results showed that the effective panicles per unit area increased significantly with the increase of the density of Pelophylax nigromaculatus in the paddy field. Rice yield, soil pH, organic matter and nutrient contents also showed an upward trend as the increase of the density of Pelophylax nigromaculatus. Compared to before the test, soil pH, organic matter, total nitrogen, total phosphorus, alkali-hydrolyzable nitrogen and available phosphorus at the end of one season increased by 2.3%~89.0%, while total potassium and available potassium decreased by 6.9%~24.4%. Therefore, it does not apply nitrogen and phosphorus fertilizer to rice production, but only apply appropriate amount of potassium fertilizer in rice and frog co-cropping mode. Reference | Related Articles | Metrics

Select

Research progress on chemical constituents, pharmacological effects and clinical applications of Saraca asoca （Roxb.） Willd CHEN Liu-yan, HUANG Qiu-mei, LAN Ting-ting, LI Bin, LI Yong-hua, RU Mei HUBEI AGRICULTURAL SCIENCES    2023, 62 (6): 86-93.   DOI: 10.14088/j.cnki.issn0439-8114.2023.06.016 Abstract （358）      PDF （1778KB）（169）       Knowledge map    Save Saraca asoca （Roxb.） Willd is mainly distributed in the tropical regions of Asia, it has been regarded as a universal panacea in India and is an important medicinal plant resource. This paper reviewed the chemical constituents, pharmacological effects, clinical application, development of related clinical therapeutic preparations, authenticity identification and other aspects of Saraca asoca （Roxb.） Willd, in order to provide references for the development and utilization of medicinal plants in Saraca, especially Saraca dives Pierre mainly distributed in China. Reference | Related Articles | Metrics

Select

Spatio-temporal evolution and spatial correlation of carbon emissions in Guiyang City based on land use change ZHOU Wei-ting HUBEI AGRICULTURAL SCIENCES    2023, 62 (5): 8-13.   DOI: 10.14088/j.cnki.issn0439-8114.2023.05.003 Abstract （356）      PDF （3383KB）（309）       Knowledge map    Save Taking Guiyang City as an example, based on the 30 m land cover remote sensing data from 2000 to 2020, the land use transfer matrix, carbon emission calculation model and spatial auto-correlation were used to analyze the spatio-temporal evolution and spatial correlation of land use types and carbon emissions in Guiyang City, to provide reference for the realization of regional “dual carbon” goal and the development of the green and low-carbon economic model. The results showed that from 2000 to 2020, the total carbon emission of land use in Guiyang City had a rapid growth rate on the whole, and the carbon source showed an increasing trend. The carbon source mainly consisted of construction land, and the carbon sink mainly consisted of forest land with only slight fluctuation. In terms of the spatial differences of carbon emissions from 2000 to 2020, the heavy carbon emission areas were mainly concentrated in Yunyan District and Nanming District, and showed a westward expansion trend; the moderate carbon emission areas were mainly concentrated in the southwest and northeast wings of Guiyang City, and showed a northeast shift trend. In terms of spatial correlation, the carbon emission of land use in Guiyang City showed a positive spatial correlation in 2000, and a negative spatial correlation with increasing correlation from 2005 to 2020. The pattern of land use carbon emission in Guiyang City was not optimistic, and the structure and intensity of land use were in urgent need of adjustment. Therefore, feasible low-carbon emission reduction policies should be formulated according to the actual situation of Guiyang City to promote the low-carbon, efficient and sustainable utilization of regional land resources. Reference | Related Articles | Metrics

Select

Effects of sowing date on inbred line growth, female/male ears flowering time and yield of black waxy corn ZHAI Rui-ning, HUANG Kai-jian, HUANG Ai-hua, ZOU Cheng-lin, MO Run-xiu, WEI Xin-xing, YANG Meng HUBEI AGRICULTURAL SCIENCES    2023, 62 (6): 1-5.   DOI: 10.14088/j.cnki.issn0439-8114.2023.06.001 Abstract （348）      PDF （2607KB）（154）       Knowledge map    Save In order to study the effects of different sowing dates on growth, flowering period, and yield of the parents of black waxy corn （Zea mays L.）variety Guiheinuo 609, based on the climatic characteristics of Guangxi, six sowing dates （Feb. 25 and 29, Mar. 4 and 8 for the male plant; Feb. 25 and Mar. 8 for the female plant） were designed by using the Heinuo 102 and Lyugannuo （the parents of Guiheinuo 609） as experimental materials. The occurrence time of growth periods, leaf growth rate, and yield traits of the parents were measured. The results showed that the flowering period of the parents was delayed during the retarding sowing date. It was the best for the occurrence of pollening stage of the male and silking stage of the female at the same sowing dates （Feb. 25 and Mar. 8）, and it occurred generally or did not occurre at different sowing dates. The fastest leaf growth rate and the longest tassel occurred in the early sowing parents （Feb. 25）. And in the retarding sowing dates, the parents’ plant height, ear position height, ear length, and kernel line number were gradually increased without significant difference, as well as their ear diameter, seeding rate and yield were gradually increased with a significant difference（P<0.05）. In conclusion, in order to ensure the florescence of the male and female parents meet normally and avoid the influence of temperature, it was best to focus on the simultaneous sowing date during seed production of Guiheinuo 609, and the most suitable sowing date should be early March, but should not exceed mid-March in Guangxi. Reference | Related Articles | Metrics

Select

Study on the adaptability of flue-cured tobacco variety Yunyan 87 to the intensity of threshing and redrying HE Bin, CAI Bin, HU Yong HUBEI AGRICULTURAL SCIENCES    2023, 62 (8): 102-106.   DOI: 10.14088/j.cnki.issn0439-8114.2023.08.016 Abstract （338）      PDF （1528KB）（66）       Knowledge map    Save In order to explore the adaptability of flue-cured tobacco variety Yunyan 87 to threshing intensity and redrying intensity, the experiment was conducted with the middle C3F and upper B2F tobacco leaves of Yunyan 87 as materials, and five threshing intensities and five redrying intensities were set to study their effects on the percentage of large and medium slices, stalk content and sensory quality of tobacco leaves after threshing and redrying. The results showed that with the increasing of threshing intensity, the stalk-containing rate of the middle leaves showed an overall upward trend, and the upper-leaf stalk rate showed an overall trend of first increasing and then decreasing. The highest and lowest stem content of middle leaves were 1.53% and 1.43% respectively, and the highest and lowest stem content of upper leaves were 1.06% and 0.83% respectively; the content of thick stalks in the middle and upper leaves did not change much. With the increasing of threshing intensity in the middle leaves, the ratio of large pieces, fragments and broken pieces decreased, the rate of medium and small pieces showed an overall increasing trend, and the rate of large and medium pieces did not change much. With the increasing of the threshing intensity of the upper leaves, the large and medium flake rates first increased and then decreased, and the medium flake rate, the small flake rate, the fragment rate and the powder rate showed a trend of first decreasing and then increasing. With the decreasing of the re-baking intensity, the strength of the middle leaves was the highest at the intensity 2; the transparency and the thick feeling showed a decreasing trend; the smoothness, longness, softness and roundness were all the best at the intensity 3. The strength, transparency and thickness of the upper leaves decreased with the reduction of the redrying intensity; the smoothness, longness, softness and roundness were all the best at intensity 3. To sum up, high-strength threshing could effectively reduce the rate of large leaves in the middle leaves, increase the rate of medium leaves, reduce the rate of fragments and powders, and help control the structural indicators of tobacco leaves; the intensity of 2 could satisfy standard requirements for both the large and medium rates of upper leaves. Redrying intensity 3 had the smallest loss of aroma, which was beneficial to reduce miscellaneous air, and the overall sensory quality was better. Reference | Related Articles | Metrics

Select

Effects of varieties and mechanical-transplanting density on rice quality under the rice-shrimp co-cropping mode TANG Jian-peng, CHEN Jing-du, ZHANG Ming-wei, YAO Yi, WEN Kai, MIN Si-gui, LU Pei-ling HUBEI AGRICULTURAL SCIENCES    2024, 63 (1): 1-6.   DOI: 10.14088/j.cnki.issn0439-8114.2024.01.001 Abstract （337）      PDF （1526KB）（254）       Knowledge map    Save The effects of different mechanical-transplanting patterns and densities on the rice quality of Nanjing 9108 and Nanjing 5718, two japonica rice varieties with good taste quality, were studied. The results showed that compared with the conventional cultivation mode, the rice-shrimp co-cropping mode increased the head milled rice rate, protein content and gel consistency of rice, and decreased the chalky grain rate, chalkiness degree and amylose content. The rice-shrimp co-cropping had a greater impact on the starch RVA profile characteristic values. It increased the disintegration value, and reduced the attenuation value. The rice-shrimp co-cropping improved the appearance, hardness, viscosity, equilibrium degree and taste value of the rice. The mechanical-transplanting density had a great influence on chalky grain rate and amylose content（P<0.01）, significantly affected chalkiness degree and protein content （P<0.05）,and the taste quality of rice was significantly improved with the decrease of the mechanical-transplanting density. The interaction analysis showed that varieties, mechanical-transplanting densities, patterns, and their interactions had significant effects on rice quality. Reference | Related Articles | Metrics

Select

Analysis of influencing factors of farmland fragmentation based on geographical detector： A case study of Guangzhou City CHEN Jun-tao, LIN Jin-yao HUBEI AGRICULTURAL SCIENCES    2023, 62 (5): 14-21.   DOI: 10.14088/j.cnki.issn0439-8114.2023.05.004 Abstract （336）      PDF （2192KB）（273）       Knowledge map    Save Guangzhou was selected as the research area. The landscape pattern index method, comprehensive index method and principal component analysis method were used to construct the evaluation system of farmland fragmentation degree, and the comprehensive index of farmland fragmentation degree of each town and street unit in the region was calculated. Ten quantifiable factors of natural conditions and human social activity were selected, and the geographical detector model was used to detect the impact of 10 factors on farmland fragmentation. The results showed that all 10 factors were the influencing factors of farmland fragmentation in Guangzhou City. The influence of the single factor on farmland fragmentation from strong to weak was urban administrative center distance factor, temperature factor, GDP factor, slope factor and altitude factor, precipitation factor, construction land distance factor, road distance factor, water body distance factor and population density factor. The interaction of any two of the 10 factors showed two-factor enhancement or nonlinear enhancement. Based on the research conclusions, some suggestions were put forward to provide valuable decision-making reference for reducing the level of farmland fragmentation in Guangzhou City. Reference | Related Articles | Metrics

Select

Effects of different nitrogen application rates on the expression of wheat characters based on DUS testing SUN Jian-jun, DOU Dan-dan, SHEN Pei-lin, DING Chao-ming, GUO Yu-xi, GUO Xin-hai, WANG De-xin HUBEI AGRICULTURAL SCIENCES    2023, 62 (8): 1-6.   DOI: 10.14088/j.cnki.issn0439-8114.2023.08.001 Abstract （336）      PDF （1931KB）（187）       Knowledge map    Save To explore the effects of different fertility levels on the expression of wheat （Triticum aestivum L.） traits, so as to provide reference for wheat DUS test, using 4 common wheat varieties as materials, the expression of 32 characters in DUS test was analyzed by setting 5 nitrogen application treatments. The results showed that different nitrogen application levels had a great influence on the expression of awn length, showing two code differences, while there was no difference or one code difference in the expression of quality traits, false quality traits and other visual quantitative traits. The results of variance analysis showed that the effect of nitrogen application on different measurement type traits among different varieties was different, and each trait showed significant differences under different fertility（P<0.05）. Among them, the flag leaf length, flag leaf width and spike length were greatly affected by the amount of nitrogen fertilizer, the expression of plant height, spikelet number and grain number per spike were less affected, and the expression of sterile spikelet number was basically not affected. Reference | Related Articles | Metrics

Select

Design and implementation of IoT intelligent irrigation system for agriculture based on AT80C51 microcontroller CHE Peng-fei HUBEI AGRICULTURAL SCIENCES    2024, 63 (1): 177-184.   DOI: 10.14088/j.cnki.issn0439-8114.2024.01.032 Abstract （330）      PDF （8175KB）（144）       Knowledge map    Save An IoT irrigation system based on the AT80C51 microcontroller had been developed to address the issues of unintelligent and untimely irrigation in traditional artificial irrigation methods,the system could obtain the environmental conditions of farmland through temperature and humidity sensors and transmit them to remote data centers through wireless communication modules. At the same time, the system was equipped with irrigation system threshold control equipment, which could adjust and control the pumping pump as needed. When the system determined that the farmland soil was dry, the environmental conditions triggered the system threshold and pumped water for irrigation in a timely manner, ensuring that the soil always maintained a suitable temperature and humidity.Through simulation experiments and actual testing, greenhouse lettuce at different growth stages in spring and summer was taken as the research object. Under intelligent irrigation, the average fresh weight of each plant above ground increased by at least 11.31% compared to traditional artificial irrigation;the average drainage of intelligent irrigation in spring and summer was 64.96% and 63.47% lower than that of traditional artificial irrigation, respectively;the irrigation water efficiency of intelligent irrigation in spring and summer was 68.03% and 98.61% higher than that of traditional artificial irrigation, respectively. The system operated stably, and the relevant experimental data and phenomena met expectations. Reference | Related Articles | Metrics

Select

Detection and risk assessment of Pb in tea in Xinyang City LIANG Shao-ru, DANG Yong-chao, ZHAO Feng-hua, JIANG Shuang-feng, ZHENG Jie, FU Qun-ying, WANG Xiao HUBEI AGRICULTURAL SCIENCES    2023, 62 (6): 142-146.   DOI: 10.14088/j.cnki.issn0439-8114.2023.06.026 Abstract （328）      PDF （1632KB）（118）       Knowledge map    Save In order to explore the relationship between technology, raw materials, and Pb content in tea, as well as the safety level of Pb content in tea in Xinyang City, 193 tea samples were collected from 2013 to 2020 for testing and analysis, and the Target Hazard Quotient （THQ） model was used to evaluate the health risks of Pb intake from tea. The results showed that in 193 tea samples from Xinyang City, the detection rate of heavy metal Pb was 78.76%. The Pb content in all samples was 0~4.98 mg/kg, with an average Pb content of 0.62 mg/kg. The overall level was relatively low, and the Pb content in all test samples did not exceed the standard. The detection rate of Pb in Xinyang black tea was higher than that in Xinyang Maojian. There was no significant difference in Pb content between Xinyang Maojian and Xinyang black tea, as well as between single bud tea and one-bud one/two-leaf tea. The target risk coefficients for Pb consumption in Xinyang tea by adult men, adult women, and children were 0~0.235 8, 0~0.280 6, and 0~0.540 7, respectively, indicating that Pb in Xinyang tea didn’t pose significant health risks. Reference | Related Articles | Metrics

Select

Intake levels and health risk assessment of five heavy metals in coffee peel of residents in Yunnan Province LIU Chao, LI Shu-zhen, DUAN Li-na, YANG Yan, YUAN Li-ying, ZHANG Shao-long, CAO Ping-bo HUBEI AGRICULTURAL SCIENCES    2023, 62 (6): 147-151.   DOI: 10.14088/j.cnki.issn0439-8114.2023.06.027 Abstract （327）      PDF （1628KB）（147）       Knowledge map    Save 30 coffee peel samples were collected from five major coffee producing areas in Yunnan Province, including Baoshan City, Pu'er City, Dehong Dai and Jingpo Autonomous Prefecture, Lincang City, and Xishuangbanna Dai Autonomous Prefecture. The content of lead, total arsenic, cadmium, total mercury, and chromium was measured. At the same time, a field survey was conducted on the consumption of coffee peel among 495 residents in Yunnan Province, and the intake levels and potential risks of five heavy metals were evaluated. The results showed that the daily intake of five heavy metals in the coffee peel of residents in Yunnan Province was lower than the evaluation value. Under P95, the daily intake of lead, total mercury, cadmium, total arsenic, and chromium were 0.034 00, 0.001 90, 0.009 60, 0.018 00, and 0.046 00 μg/kg, and the results were all lower than their respective evaluation values, indicating that the risk of the five heavy metals ingested through coffee peel to human health was at an acceptable level. The contribution rates of daily intake of five heavy metals and daily intake under P95 were chromium>lead>total arsenic>cadmium>total mercury. The contribution rates of daily intake of chromium, lead, and total arsenic and daily intake under P95 were 93.35% and 89.49%, respectively. The daily intake of heavy metals such as lead, total arsenic, cadmium, total mercury, and chromium in the coffee peel of residents in Yunnan Province was generally low. It was recommended to further conduct health risk assessments of heavy metals for consumer groups of key regions. Reference | Related Articles | Metrics

Select

Social isolation, loneliness and happiness of rural residents WANG Jin, SHI Ming-cong HUBEI AGRICULTURAL SCIENCES    2023, 62 (6): 246-251.   DOI: 10.14088/j.cnki.issn0439-8114.2023.06.043 Abstract （327）      PDF （1689KB）（156）       Knowledge map    Save Based on China Family Panel Studies（CFPS）data in 2018, the relationship between social isolation, loneliness and happiness of rural residents was analyzed. The robustness test of the effect relationship among the three was performed by using the propensity value matching and structural equation model. The results showed that social isolation could significantly improve the loneliness and reduce the happiness of rural residents; loneliness played a partial intermediary role in the relationship between social isolation and happiness of rural residents, that was, social isolation reduced individual happiness by improving loneliness; through the heterogeneity analysis of rural residents with different family income levels, it was concluded that the impact of social isolation on happiness of low-income groups was far less than that of medium and high-income groups. Based on this, the government should introduce relevant policies to prevent the social isolation and loneliness of rural residents in advance, improve the quality of social capital of rural residents, ensure good social relations and social networks, and reduce the impact of social isolation and loneliness on the happiness of rural residents. Reference | Related Articles | Metrics