以草甸黑土为试材,进行微区定位试验.8年试验结果表明,秸秆还田有利于土壤有机质积累,全氮、全磷、速效氮含量提高,但土壤pH值有所下降.秸秆还田更有利于大团粒结构的形成,容重随之降低.不同作物产量效应以大豆增产最为显著,玉米次之,小麦最差. The meadow black soil was used as the test material to carry out the micro-location experiment.The results of 8 years showed that straw returning was beneficial to the accumulation of soil organic matter, and the contents of total nitrogen, total phosphorus and available nitrogen increased, but the soil pH decreased Field is more conducive to the formation of large aggregate structure, with the consequent decrease of bulk density.Different crop yield effects with soybean yield the most significant, corn followed, wheat the worst.