陈蓉蓉 周治国 曹卫星 戴廷波" /> 基于GIS的农田土壤、作物特征空间变异性及其相互关系
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基于GIS的农田土壤、作物特征空间变异性及其相互关系

陈蓉蓉 周治国 曹卫星 戴廷波   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-09-18

  • Received:1900-01-01 Revised:1900-01-01 Online:2004-09-18

摘要: 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.

关键词: 南海中西部海域, 碳氮稳定同位素, 营养生态位, 鸢乌贼

Key words: trophic niche, Sthenoteuthis oualaniensis, central and western South China Sea, carbon and nitrogen stable isotopes