基于GIS的农田土壤、作物特征空间变异性及其相互关系

编号 zgly0000357190

文献类型 期刊论文

文献题名 基于GIS的农田土壤、作物特征空间变异性及其相互关系

学科分类 220.1040;森林土壤学

作者 陈蓉蓉  周治国  曹卫星  戴廷波 

作者单位 南京农业大学  江苏省信息农业高技术研究重点实验室 

母体文献 应用生态学报 

年卷期 2004,15(9)

页码 1678-1680

年份 2004 

分类号 S154.4  P28 

关键词 农田土壤  作物  空间变异性  GIS  精确农作  产量 

文摘内容 The objective of this research was to investigate the variability and the quantitative relationships among soil nutrients and crop growth status and yield. All data were analyzed by both classical statistics and geostatistics based on GIS. Soil properties included soil pH, total N, organic matter, available P and available K, while crop growth status was indicated by SPAD, LAI and SPAD × LAI. All parameters except soll pH exhibited spatial correlation.Soil total N and organic matter, SPAD, LAI and SPAD × LAI were all correlated to rice yield. Kriged interpolation maps provided good indication of the spatial variability in crop yield and growth status. Spatial interpolation and correlation analysis proved that SPAD × LAI was more indicative of crop growth status than individual variables, and useful for implementing growth season and topdressing as needed。