【摘要】 玉米残体培肥黑钙土3年后,土壤容重下降,孔隙度增加.黑钙土中>0.25 mm粒级的水稳性团聚体百分含量增加,阳离子交换量提高,土壤pH值下降.土壤理化性质都以玉米残体培肥后的处理优于对照.通过对玉米残体培肥后土壤水浸提液的研究可知,培肥后土壤有机质的含量增加.土壤浸提液浓缩过程中物质成分变化的研究,认识玉米残体培肥土壤的机制也有重要意义.更多还原

【Abstract】 The soil volume weight of chernozem decreased but its porosity increased after fertilized up by undecomposed corn for three years. The percentage content and cation exchange amount of aggregate stability of chernozem ( >0. 25 mm) increased, but the pH decreased. The physico-chemical properties of chernozem fertilized were superior to the contrast. The organic contents of fertilized soil increased by the research of soil water extract. The study on the constitute change of the concentration of soil water extract had great significance to research on the soil mechanism of fertilizing undecomposed corn.更多还原