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利用田间大区对比的方法,2008~2010年在黑龙江省呼兰区黑土上研究玉米机收后秸秆粉碎后直接还田对土壤基本理化性质的影响。结果表明:施用有机物料能够改善土壤的理化性质、培肥地力,与单施无机肥相比,无机肥配施秸秆有机物料能够增加土壤有机质含量,降低土壤容重,提高土壤孔隙度,同时改善土壤的氮、磷、钾养分状况。
Using the method of field comparison, from 2008 to 2010, we studied the effects of direct returning to the soil on the basic physico-chemical properties of corn after the straw was crushed in the black soil of Hulan area in Heilongjiang province. The results showed that the application of organic materials could improve the physical and chemical properties of soil and fertility of fertilizers. Compared with single application of inorganic fertilizers, organic fertilizers combined with straw organic materials could increase soil organic matter content, reduce soil bulk density, increase soil porosity and soil The nitrogen, phosphorus and potassium nutrient status.