| Water conservation effect of overwintering crops mulching and its effect on water use efficiency and yield of subsequent soybean |
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| DOI：10.7606/j.issn.1000-7601.2022.05.13 |
| Key Words: overwintering crop subsequent soybean water conservation effect of mulching water use efficiency yield |
| Author Name | Affiliation | | LI Feng | ngyang Academy of Agricultural Sciences,Qingyang,Gansu 745000, China | | MU Jing | ngyang Academy of Agricultural Sciences,Qingyang,Gansu 745000, China | | GENG Zhiguang | ngyang Academy of Agricultural Sciences,Qingyang,Gansu 745000, China | | TANG Xiaoli | ngyang Academy of Agricultural Sciences,Qingyang,Gansu 745000, China | | WU Junyan | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
State Key Laboratory of Aridland Crop Sciences, Lanzhou,Gansu 730070, China
Key Laboratory of Crop Genetics Improvement and Germ\|plasm Enhancementof Gansu Province,Lanzhou, Gansu 730070, China | | MA Li | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
State Key Laboratory of Aridland Crop Sciences, Lanzhou,Gansu 730070, China
Key Laboratory of Crop Genetics Improvement and Germ\|plasm Enhancementof Gansu Province,Lanzhou, Gansu 730070, China | | YU Yaqiong | Xifeng College of Vocational Secondary Education School,Qingyang, Gansu 745000, China | | LI Kefu | ngyang Academy of Agricultural Sciences,Qingyang,Gansu 745000, China | | SUN Wancang | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
State Key Laboratory of Aridland Crop Sciences, Lanzhou,Gansu 730070, China
Key Laboratory of Crop Genetics Improvement and Germ\|plasm Enhancementof Gansu Province,Lanzhou, Gansu 730070, China |
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| Abstract: |
| The purpose of this study was to explore the effects of overwintering crops mulching on soil water conservation and water use efficiency and yield of subsequent soybean. The experiment was conducted in 2019-2020 and 2020-2021. The diversity of land coverage, biomass, water consumption and soybean yield underwinter rape (Brassica pape),winter wheat (Triticum aestivum), winter pea (Pisum sativum), plastic film mulching,and open field were compared. The results showed that the biomass of winter wheat increased by 15.6% and 130.5% compared with winter rape and winter pea from seedling to cutting. The land coverage of winter rape and winter wheat were 89.2% and 84.4% respectively, which were significantly (P<0.05) higher than other treatments. The water consumption of winter rape, winter wheat and winter pea in 0~100 cm soil layer increased by 50.4% and 18.6%, 150.2% and 97.4%, 41.6% and 11.7% compared with plastic film mulching and open field, respectively. The correlation coefficients between water consumption and biomass of winter rape and winter wheat were 0.923 and 0.966, showing a significant positive correlation (P＜0.01), which had no significant correlation with land surface coverage, but the correlation between water consumption of winter rape and surface coverage was negative. During the dry growing season, winter rape and winter pea reduced water consumption by 6.7 mm and 7.5 mm compared with open field, respectively. Winter wheat and winter pea had higher grain yield of soybean, which reached 2 583.3 kg·hm-2 and 2 550.4 kg·hm-2, respectively, and soybean after winter wheat had the highest WUE by 8.3 kg·hm-2·mm-1. Based on the experiment, winter rape and winter pea were effective measure for soil water conservation and sustainable development of agriculture in northwest China, and winter wheat was a suitable planting stubble for soybean planting in arid area. |
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