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试验设20 cm留茬压倒(NPS20),40 cm留茬压倒(NPS40),40 cm立秆(NS40),20 cm立秆(NS20),6 750kg/hm2覆盖(NSB40),3 750 kg/hm2覆盖(NSB20)和传统耕作(CT)7个处理,在节水1 950 m3/hm2的条件下,研究了不同的秸秆覆盖量、留茬高度和秸秆处理对小麦产量、水分利用效率(WUE)和不同时期土壤水分的影响。结果表明,留茬覆盖免耕保护性耕作提高了春小麦的产量,NPS20,NPS40,NS40,NS20,NSB40和NSB20较CT分别增产53.08%,46.59%,40.81%,19.93%,17.33%和4.34%;留茬覆盖免耕保护性耕作提高了春小麦的水分利用效率(WUE)(NPS20,NS40,NPS40,NS20,NSB40,NSB20分别较CT提高58.02%,43.40%,47.27%,23.78%,20.69%,8.56%),但增加了小麦生育期土壤水分支出;不同处理在不同时期对土壤水分的影响不同。
The experiment consisted of 20 cm stubble (NPS20), 40 cm stubble (NPS40), 40 cm stubble (NS40), 20 cm stubble (NS20), 6 750 kg / hm2 coverage (WUE), wheat yield and water use efficiency (WUE) under different straw mulching, stubble height and straw treatment under the conditions of water saving of 1 950 m3 / hm2, And different periods of soil moisture. The results showed that stubble tillage with no - tillage conservation tillage increased the yield of spring wheat. The yield of NPS20, NPS40, NS40, NS20, NSB40 and NSB20 was 53.08%, 46.59%, 40.81%, 19.93%, 17.33% and 4.34% higher than that of CT respectively. Stubble tillage and no-tillage conservation tillage improved the WUE of spring wheat (NPS20, NS40, NPS40, NS20, NSB40 and NSB20 respectively increased by 58.02%, 43.40%, 47.27%, 23.78%, 20.69% and 8.56 %), But increased soil moisture expenditure during wheat growth period; different treatments had different impacts on soil moisture at different periods.