秸秆还田对土壤有机质含量的影响

Effect of Stalk Mulch to Soil Organic Matter Level

有机质含量是衡量土壤肥力高低的决定因素。作物秸秆含有多种营养元素,是重要的有机肥源。通过人工或机械操作,并综合采用少、免耕,选用良种、平衡施肥、防治病虫害、模式化栽培等多项配套农艺措施,以不同形式将秸秆还田,可以起到降低土壤容重、增加土壤孔隙度、减少土壤水分蒸发、提高土壤有机质和氮、磷、钾等养分的含量,维持土壤养分平衡、促进作物生长发育、增加作物产量的作用。

Content of organic matter is the key factor to soil fertility. Crop stalk is rich in nutritional elements, and it is important source for organic fertilizer. Through artificial or mechanical operation, stalk mulch in various forms combined with systematic agronomic measures like minimum/non tillage, improved variety of seed, balanced fertilization, insect management, which plays a role to drop soil bulk density, to increase porosity, to reduce evaporation, to increase organic matter and nitrogen/phosphors/potassium, to keep nutrition balance, and improve crop growth and yield.