四川郫县土壤耕层有机质时空变异特征  

Temporal and Spatial Variability of Soil Organic Matter Contents in Pixian County,Sichuan

作　　者：魏甦[1] 张世熔[1] 邓良基[1] 刘英华[1] 肖鹏飞[1] 

机构地区：[1]四川农业大学资源环境学院,四川雅安625014

出　　处：《土壤通报》2004年第3期261-263,共3页Chinese Journal of Soil Science

基　　金：四川省教育厅(0lLA02)项目资助

摘　　要：在ArcGlS8.1软件系统平台上,通过分析四川郫县土壤耕层1981年93个样点和2002年46个样点的有机质含量,研究了该县有机质的时空变化特征。结果表明,郫县耕层土壤有机质平均含量从1981年的26.4gkg-1增加到2002年的28.2gkg-1。其区域变化差异为:东部略微下降,中部与西部增加。近21年来水稻土有机质平均含量仅少量增加,而黄壤则增幅明显。距成都市区的远近和推广秸秆还田程度是引起耕层土壤有机质含量时空变异的主要原因。The temporal and spatial Variability of soil Organic matter( SOM)contents were studied by the ArcGIS 8.1 software platform in 1981 with 93 sampling points and in 2002 with 46 sampling points in Pixian county (Sihuan Province,china)-a typical region in the West Plain of Sichuan.The results indicated that the average SOM content in the arable layer increased to 28.2g kg^(-1) in 2002 from 26.4g kg^(-1) in 1981.In the county,the average SOM content in the East decreased slightly,but those in the Central and the West increased during the past 21 years. The SOM in paddy increased slghtly.

关 键 词：郫县 土壤耕层 有机质 时空变异特征 秸秆还田程度 土壤肥力 

分 类 号：S153.621[农业科学—土壤学] S158[农业科学—农业基础科学]