基于地统计学的土壤氮素与pH的空间变异性研究  

Spatial Variability of Soil Nitrogen and pH Assessed by the Method of Geostatistics

作　　者：朱红霞[1,2] 陈效民[1] 杜臻杰[1] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095 [2]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《土壤通报》2010年第5期1086-1090,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金项目"硝态氮在含有大孔隙的农田土壤中运移机理及数学模拟"(40371055)资助

摘　　要：以太湖流域典型水稻土(白土)为例,运用地统计学方法分析了田间尺度不同土层土壤全氮、硝态氮和铵态氮以及pH的空间变异规律。结果表明,全氮、硝态氮和铵态氮的含量随深度的增加而减少;硝态氮、铵态氮的变异程度较大。土壤pH与硝态氮的空间分布格局极为相似,说明它们之间空间相关性较强。对研究区的土壤氮素和pH进行了克里格插值与绘图,并分析了各种氮素和pH的空间分布格局。研究土壤氮素和pH的空间变异,对研究区合理施肥与农田生态环境保护具有重要的指导意义。The spatial variabilities of total nitrogen,NO3-1-N,NH4＋1 and pH at different soil depths of a typical paddy soil in Taihu Lake watershed were studied using a Geostatistical method.The results showed that the concentrations of total nitrogen,NO3-1-N and NH4＋1-N decreased with the increase of the soil depth.The variabilities of NO3-1-N and NH4＋1-N were relatively high.The spatial distribution pattern of soil pH was similar to NO3-1-N,indicating a strong spatial correlation between them.The spatial distribution of soil total nitrogen and pH were analyzed by the method of Kriging interpolation.This study would have some significance in reasonable fertilization and protection of the ecological environment in the paddy field.

关 键 词：土壤氮素 PH值 空间变异 半方差分析 克里格插值 

分 类 号：S158[农业科学—土壤学]