水土保持学报2011，Vol.25Issue(5)：81-85,5.
连续多年秸秆还田对玉米耕层土壤理化性状及微生物量的影响
Effects of Continuous Returning Straw to Maize Tilth Soil on Chemical Character and Microbial Biomass
摘要
Abstract
The experiment was designed to study the effects of continuous returning straw to maize filed on 0-40 cm soil nutrient and microbe,0-20 cm soil microbial biomass in 3-year returning（2007-2010）,6-year returning（2005-2010）,9-year returning（2002-2010）,and non returning field at Pingliang maize breeding experimental station of Gansu agricultural university from 2002 to 2010.The tilth physical and chemical property and variation of main soil microorganism were tested to probe the effectiveness of continuous straw returning on soil nutrients and microorganism environment.The result indicated that continuous straw returning to the maize field coupling with soil shallow cultivation could reduce deep soil bulk density and pH,significantly increase SOM,TN,TP,AN,AP and AK content in 0-20 cm with the rank of H9H6H3CK;but in but 20-40 cm layer,no significant difference was observed except for SOM.Continuous straw returning also increased soil bacteria,fungi,actinomyces quantity in 0-40 cm,H9 had the highest bacteria and fungi increase（152% and 159%,respectively）,actinomyces increased 15.1%.MBC in 0-20 cm also increased significantly,indicating that continuous straw returning to the field could improve carbon supply of soil microorganism effectively,and help to increase microorganism.关键词
秸秆还田/玉米/耕层/土壤特性/微生物量Key words
straw return to field/maize/till layer/soil character/microbial biomass分类
农业科技引用本文复制引用
慕平,张恩和,王汉宁,方永丰..连续多年秸秆还田对玉米耕层土壤理化性状及微生物量的影响[J].水土保持学报,2011,25(5):81-85,5.基金项目
国家科技支撑项目 （）
甘肃省干旱生境作物学重点实验室资助项目 （）
