【摘要】 通过田间定位试验和土壤理化性质的测定,探讨了秸秆覆盖对川中丘陵区土壤的改良效果及对作物产量的影响。研究结果表明,与对照CK1相比,秸秆覆盖可使土壤总孔隙度增加2.88%~5.76%,土壤容重降低1.86%~3.73%,并且各生育期覆盖处理的土壤含水量均比对照高,并且秸秆覆盖还田对促进土壤团粒结构形成具有较大作用,改善了土壤通透性和保水保肥性;同时秸秆覆盖还田使土壤有机质、全氮、速效氮、速效磷、速效钾得到明显提高,从而培肥地力。试验表明随秸秆覆盖量的增加,作物增产效果越明显。更多还原

【Abstract】 Through field fixed location experiment and some determinations of soil physical and chemical properties,the ameliorative effect and the crop field effect of straw mulching in hilly area of the central Sichuan Basin was explored.The result indicated that straw mulching could increase soil porosity by 2.88 %-5.76 %,reduce soil bulk density by 1.86 %-3.73 % and the content of soil water with straw mulching was higher than that with no straw mulching treatment(CK1)at different growth stage,improve water-stable aggregate;and increase soil organic matter,available N,available P,available K,improve soil perviousness and soil retention of water and fertilizer.In addition,the crop yield increased better with increasing mulching quantity.更多还原