秸秆经铡细或粉碎后直接翻入土壤,不仅可有效地改善土壤理化性状,增加土壤中的有机质含量,而且能增强土壤微生物活性,提高土壤肥力,有利于作物高产。然而,一些地方由于秸秆还田的方法不当,也出现了一些不容忽视的问题,如秸秆翻压还田后,使土壤变得过松,孔隙大 The stalks can be directly turned into the soil after being finely ground or crushed, which can not only effectively improve the physical and chemical properties of the soil, increase the organic content of the soil, but also enhance the activity of the soil microorganism, increase the soil fertility and increase the yield of the crop. However, there are some problems that can not be neglected due to improper methods of returning straw to soil in some places. For example, after the straw is pressed back into the soil, the soil becomes too loose and the pore is large