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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 （374）

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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.

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Breeding analysis of new lines of leafy vegetable sweet potato based on variation coefficient

LI Bao-zheng, XIAO Bo, ZENG Xin-yu, XU Qian

HUBEI AGRICULTURAL SCIENCES 2024, 63 (5): 1-5. DOI: 10.14088/j.cnki.issn0439-8114.2024.05.001

Abstract （309）

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In order to improve the breeding efficiency of new lines of leafy vegetable sweet potato and explore the influence of variation coefficient on the breeding of new lines of leafy vegetable sweet potato, seven leafy vegetable sweet potato lines were used as experimental materials to study the number and yield of shoot tips and their variation coefficients among different lines at different picking times, among different picking times of different lines, and among different replicates of different lines, and the correlation analysis of characters of shoot tips and variation coefficient was carried out. The results showed that the variation coefficient of shoot tip traits of new lines of leafy vegetable sweet potato was from large to small in the order of different picking times of different lines, different lines at different picking times, and different repetitions of different lines. The variation coefficient of the yield and number of shoot tips of high and stable yield lines was generally high, but the variation coefficient between repeats was low. The yield of shoot tips of lines 2019-1-15, 2018-2-76 and 2018-2-37 was higher than that of the control variety Fushu 7-6, and the yield difference reached a very significant level （P<0.01）. There was a significant positive correlation between the number of shoot tips and the yield of shoot tips （r=0.558 9, P<0.01）, and a significant positive correlation between variation coefficient of the number of shoot tips and variation coefficient of the yield of shoot tips （r=0.668 3, P<0.01）. It was concluded that the variation coefficient played an important role in the breeding of leafy vegetable sweet potato lines. In the process of breeding new lines of high and stable yield leafy vegetable sweet potato, the new lines with a large number of stem tips could be preferentially selected, and the effects of the yield of shoot tips and its variation coefficient could be comprehensively considered. 2019-1-15, 2018-2-76 and 2018-2-37 were new lines of leafy vegetable sweet potato with relatively high and stable yields.

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