玉米秸秆还田培肥效果研究

利用田间小区方法连续3年在邯郸地区褐土研究玉米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。在等碳量的条件下,玉米秸秆对保持和提高土壤有机质含量的效果好于牛粪肥。

Preliminary Report of returning corn straw into soil on soil fertility

A continuous three-year field Small-plot experiment was,conducted to study the effects of application of smashed maize straw on soil physical characteristics on cinnamonic soil in Handan.The results showed that organic material mainly improved the soil physical and chemical characteristics and eventuated in enhancing soil fetility.A combination of chemical fertilizers and organic materials increased soil organic matter content,capiUaryporosity and decreased soil bulk density. Meanwhile,the soil nutrient status of N ,P an d K were improved,compared to organic fertilizer treatment alone.For maintaining and increasing soil organic matter, maize straw was better than Cattle manure with equal carbon content.