秸秆直接还田土壤培肥试验研究

[目的]通过设计不同处理试验,探索秸秆直接还田对土壤肥力、产量所产生的效应,为秸秆直接还田、科学利用提供技术依据。[方法]连续3年利用小区定位进行秸秆还田试验。[结果]处理间产量差异不显著,生育期没有差异;各处理前期灌浆速率较低,以后逐渐上升,至末期籽粒饱满后灌浆逐渐停止。处理②～⑥灌浆速率至28 d基本达到高峰,随后逐渐下降。处理①(单施化肥)灌浆速率的高峰早于其他处理,后期灌浆速率较低,致使最终千粒重最低。[结论]前茬玉米全部秸秆直接还田对当季小麦产量的影响不显著。

Study on Straw Returning for Soil Fertilization Experiment

[Objective] The test of different processing was designed to explore the effects of directly returning straw to field on the soil fertility and yield,and provide technical basis and scientific use for directly returning straw to field.[Methods]Test for three consecutive years of using cell localization of straw returning was carried out.[Result] The difference of yield among different treatments wasn＇t significant,and growth period hadn＇t difference.The early grain filling rate was lower,then gradually increased,to the end full grain filling gradually stop.Filling rate of treatment ②,③,④,⑤,⑥ reached the peak at 28 days,then decreased gradually.Filling rate peak of treatment ①（chemical fertilizer only） was earlier than that of other treatments.The late grain filling rate was low,resulting in the lowest final grain weight.[Conclusion] The effect of maize straw returning on the yield of that season wheat wasn’t obvious.