全膜双垄沟播玉米秸秆膜下带状还田模式对土壤水分和玉米产量的影响

目的]研究全膜双垄沟播玉米秸秆膜下带状还田模式对土壤水分和玉米产量的影响。方法]在陇东旱塬区,设计6个处理,研究全膜双垄沟播玉米秸秆膜下还田对玉米农艺性状、产量和土壤水分利用效率的影响。结果]地表覆盖2 cm还田后玉米农艺性状、生物产量和水分利用效率较全膜双垄沟播不还田显著降低。玉米秸秆膜下带状还田较不还田玉米农艺性状尤其是株高、茎粗有一定的降低,籽粒产量降低0.40%~7.42%,但差异不显著,生物产量显著降低,但经济系数差异不显著。全膜双垄沟播玉米秸秆膜下还田各处理对玉米生长期耗水量和土壤水分利用效率无显著影响。结论]该研究为采用全膜双垄沟播技术进行秸秆还田提供理论依据。

Effcts of Whole Film Double Furrow Sowing Maize Straw Returning Pattern on Soil Moisture and Maize Yield

Objective]To study effcts of whole film double furrow sowing maize straw returning pattern on soil moisture and maize yieldMeth-od]Six treatments were designed to study effects of whole film double furrow sowing maize straw returning on maize agronomic characters,maize yield and soil water use efficiency.Result]The agronomic characters,biological yield and water use efficiency of maize after the surface being covered by 2 cm were significantly lower than that of the whole film.Maize agronomic traits especially plant height,stem diameter decreased under maize straw returning returning patter.Grain yield decreased by 0.40%-7.42%,but the difference was not significant.The biological yield de-creased significantly,but the difference of economic coefficient was not significant.There was no significant effect of whole film double furrow so-wing maize straw returning on the long-term water consumption and soil water use efficiency.Conclusion]The study provides theoretical basis for the application of the whole film double furrow seeding technique in the field of straw mulching.