| Effects of wheat-residue application on soil water and water use efficiency in the Weibei Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2010.05.11 |
| Key Words: wheat residue incorporation water storage yield water use efficiency |
| Author Name | Affiliation | | MA Xiaoli | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China；
Technology promotion Center of Agriculture in Hanzhon city, Hanzhong, Shaanxi 72300, China | | JIA Zhikuan | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China | | XIAO Enshi | College of agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Wenyue | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIU Ting | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIU Yanhong | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China | | CUI Rongmei | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The purpose of this study was to investigate the effects of wheat-residue application on soil moisture, winter wheat yield and water use efficiency. Experiments on application of wheat straw to soil in the Weibei Loess Plateau of Shaanxi Province were conducted during 2008～2009 to study the effect of straw returning on soil moisture changes at different layers, crop yield and water use efficiency. The results showed that from sowing to heading stage, wheat-residue application treatment of 9 000 kg/hm2 made a significant difference compared to control, in the 0～80 cm soil layer, the soil water storage was increased by 15.96 mm (P＜0.05), while in the 80～200 cm layer, it was increased by 15.11 mm (P＜0.01). In the 0～80 cm soil layer, soil water storage with the treatment of 6 000 kg/hm2 was increased by 10.74 mm compared with control. Wheat residue application treatment of 9 000 kg/hm2 made a great contribution to the improvement of winter wheat yield, water use efficiency and water consumption, all increased by 15.70%, 5.66% and 8.9% respectively compare
d with control. At the same time, straw returning treatment of 6 000 kg/hm2 increased winter wheat yield by 6.22% (P＜0.05) compared with control, while i
t was 8.93% (P＜0.05) less than that with 9 000 kg/hm2 treatment, and there was no significant difference in water use efficiency and water consumption co
mpared with control. As a whole, application of wheat straw to soil is important for the improvement of soil water storage, and it can significantly increase winter wheat yield, water use efficiency and water consumption. |
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