哈尔滨市黑土全量养分空间变异分析——以方正县德善村为例

Spatial Heterogeneity Analysis on Black Soil Total Nutrients in Harbin——A Case of Deshan Village in Fangzheng County

利用地统计学和GIS相结合的方法分析了哈尔滨市方正县德善村土壤养分有机质、全氮、全磷、全钾空间变异状况。采集土壤表层0-20 cm土样51个,面积约50 hm^2。经常规化验分析和空间分析结果表明：有机质变异系数〈0.1为弱变异,全氮、全磷、全钾在0.1-0.9为中等变异;土壤有机质、全氮的理论模型均为球状模型;全磷和全钾理论模型为指数模型;有机质和全氮的C0/（C0＋C）分别为8.3%、8.9%,说明这两种养分具有较强的空间相关性;全磷、全钾的C0/（C0＋C）分别为49.6%、49.9%,具有中等空间相关性。

To provide scientific suggestions on soil nutrient management and balanced fertilization in Harbin city, Geostatistics method and Geographic Information Systems were introduced to study soil spatial heterogeneity in Deshan village in Fangzheng county. 51 soil samples at the depth 0-20 cm were collected from a 50 hm^2 stubble field, and the soil properties that organic matter, total N, total P,total K were analyzed. After treated with routine chemical mothod and spatial analysis,the results indicated： soil organic matter （OM） showed weak variation,and the coefficient of variation （CV） was less than 0. 1;total N,total P and total K showed medium variation, with CV between 0.1 and 0.9;the theoretic semivariogram models of OM and total N were spheroid; that models of total P and total K were exponent;the ratios between Nugget and Sill of OM and total N were 8.3% and 8.9% ,respectively,which indicated the strong spatial correlation between these two nutrients;the ratios of total P and total K were 49.6 % and 49.9 %, respectively,so they show medium spatial correlation.