成都平原土壤pH 的时空分布特征及影响因素研究 - 四川农业大学学报.PDFVIP

DOI :10.16036/j.issn.1000 -2650.2006.03.016 24 　3 Vol.24 No.3 2006 9 　　　　　　　　 　Journal of Sichuan Agricultural University 　　　　　　　　 　 Sep.2006 Temporal-spatial Distribution Characteristics and Influence Factors of Soil pH in the Chengdu Plain L I T i ng, ZHA NG S hi-r ong , Gan Wen-zhi (College of Resource and Environment, Sichuan Agricultural University, Yaan 625014, Sichuan, China) Abstract: he temporal-spatial variability of soil pH in the Chengdu basin is expressed by the spatial analytic approaches such as ordinary kriging (OK)on the basis of the software ArcGIS Desktop 9.0. he average content of soil pH, which changes from 6.95±0.90 in 1982 to 6.70±0.78 in 2002 with a decrease of 3.60%, has shown a decreasing tendency during 20 years.Although there is just a little decrease in the average content of soil pH, soil pH of 46.29%area in the basin decreases and that of 53.71%increases. he area distribution of soil pH is different, soil pH increases in the northeast part such as from Dujiangyan to Pengzhou, the boundary between Qionglai and Pujiang, the place where Chengdu marches with Longquanyi and Shuangliu;it changes slowly in the central part;but soil pH in some places such as Jingtang and Pujiang decreases sharply. he change of soil pH is remarkably influ- enced by soil parent material, land use types, fertilization measure and industry development. Key words:soil pH;temporal-spatial variability;influence factors;Chengdu Plain pH 李　婷, 张世熔 , 干文芝 (四川农业大学 资源环境学院, 四川雅安　625014) :在ArcGIS 9.0 软件系统平台