摘要
利用小麦-玉米轮条件下不同秸秆还田方式进行定位试验,对不同秸秆还田方式下土壤有机碳和活性有机碳含量进行了6a11季的连续监测,结果表明:单施化肥和秸秆还田配施化肥均能提高土壤有机碳含量;3种还田方式均能显著提高活性有机碳和碳库管理指数,表现为玉米秸秆还田>两季秸秆还田>小麦秸秆还田;3种秸秆还田处理的土壤有机碳增长速率为玉米秸秆还田>两季秸秆还田>小麦秸秆还田。小麦季玉米秸秆还田对有机碳活性提升效果优于两季秸秆还田和玉米季小麦秸秆还田。
A 6-year field experiment was carried out wheat straw incorporated with chemical fertilizers on soil in a wheat and corn rotation system. The results to study the effects of corn stover or/and organic carbon and active organic carbon in showed that the treatments of chemical fer- tilizer applied only and chemical fertilizer applied with straw returning increased the active organic carbon proportion in soil. All three methods of straw returning significantly improved the quantity of labile organic carbon（LOC） and （carbon management index）（CMI）, which was in the follow order.corn straw application〉 corn and wheat straw application^wheat straw application. And for the total organic carbon（TOC） increase speed was corn straw applied〉corn stover and wheat straw applied〉wheat straw applied. There was higher organic carbon activity in the treatment of returning corn straw in wheat season than the treatment of both corn stover and wheat straw ap- plied in two seasons or the treatment of wheat straw applied in corn season.
出处
《河南农业科学》
CSCD
北大核心
2012年第9期63-67,共5页
Journal of Henan Agricultural Sciences
基金
国家小麦产业技术体系(CARS-3)
农业部公益性行业(农业)科研专项(200803030
201103003)
关键词
连续耕作
秸秆还田
小麦-玉米轮作
土壤有机碳
活性有机碳
continuous cultivation
straw returned
wheat-corn rotation system
soil organic car-bon
active organic carbon
