为探讨微肥的精准施用,采用地统计和GIS技术相结合的方法,研究了植烟土壤有效态微量元素(有效铁、锰、铜、锌)的空间变异规律.结果表明,土壤有效态微量元素变异幅度在22.0%-48.4%之间,表现出中等强度的空间变异性.4种微量元素的空间结构模型均符合球状模型,利用克里格法生成4种元素的空间分布图显示,研究区域有效铜和有效锰整体为中等偏高水平,有效铁和有效锌含量缺乏的区域分别占78%和43%.%Spatial distribution of soil available micro-elements in tobacco planting fields was studied to provide theoretical basis for precision application of micro-fertilizers using geostatistics and GIS technique on small scale. Results showed that soil available microelements (Fe, Mn, Cu, and Zn) had medium variability with coefficient of variation from 22.0％ to 48.4％. The semivariograms of available microelements could be fitted well with the spherical models. Kriging method was used to generate spatial distribution maps of soil available microelements, which indicated the content of soil available Cu and Mn had medium to high levels, while the 78％ and 43％ area of the whole study region were lack of soil available Fe and Zn, respectively.
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