【摘要】 通过 8年长期定位试验研究了不同免耕方式对作物产量和土壤理化性状的影响。研究结果表明 ,连续多年双免耕作不仅可以提高作物产量 ,减少劳动力投入 ,增加经济效益 ,同时能明显改善土壤理化性状。连续 8年双免可使土壤有机质高达 5 0 8g/kg ,全氮含量高达 3 1g/kg ,速效磷提高 95 8% ,速效钾提高 6 1 0 %。同时能增加土壤孔度和促进团聚体的形成 ,达到高产节源 ,培肥土壤的目的更多还原

【Abstract】 The effect of different zero tillage on the crop yield and soil properties has been studied by long term fixed test during eight year. The researched results shows: The continuous double zero tillage raised the crop yield, reduced invest of labor force and increased the economic benefit. Meanwhile it obviously improved the soil physical and chemical properties. The organic matter content and total nitrogen content of the soil reached 50 8g/kg and 3 1g/kg individually. The effective P and effective K of the soil were increased 95 8% and 61 0% individually. It was also beneficial to the formation of aggregate of the soil and increased the porosity of the soil. Getting high yield, saving energy sources and improving soil fertility could be reached by the double zero tillage.更多还原