| 沈阳城市土壤pH和养分的空间变异性研究 |
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| 引用本文： | 张宏伟,魏忠义,王秋兵.沈阳城市土壤pH和养分的空间变异性研究[J].江西农业学报,2008,20(5):102-105. |
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| 作者姓名： | 张宏伟 魏忠义 王秋兵 |
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| 作者单位： | 沈阳农业大学,土地与环境学院,辽宁,沈阳,110161 |
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| 摘 要： | 采用地统计学和地理信息系统（G IS）相结合的方法研究了沈阳城市土壤pH、全磷和速效钾的空间变异特征。结果表明：pH、全磷、速效钾的最佳拟合模型为指数模型。全磷、速效钾的C0/（C0＋C）分别为10.62%、9.94%,说明沈阳城市土壤全磷和速效钾的空间相关性较强,其空间变异主要是结构性因素引起的;pH的C0/（C0＋C）为44.25%,说明土壤pH具有中度的空间相关性,其空间变异是由随机性因素和结构性因素共同引起的。最后通过克里格插值分析沈阳城市土壤pH、全磷和速效钾的空间分布特征。
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| 关 键 词： | 地统计学 城市土壤 pH 土壤养分 空间变异 |
Spatial Variability of Soil pH-value and Nutrient in Shenyang City |
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| ZHANG Hong-wei,WEI Zhong-yi,WANG Qiu-bing.Spatial Variability of Soil pH-value and Nutrient in Shenyang City[J].Acta Agriculturae Jiangxi,2008,20(5):102-105. |
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| Authors: | ZHANG Hong-wei WEI Zhong-yi WANG Qiu-bing |
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| Institution: | ZHANG Hong - wei, WEI Zhong - yi ,WANG Qiu - bing ( College of Land and Environment, Shenyang Agricultural University, Shenyang 110161, China) |
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| Abstract: | Geo-statistics combined with Geographical Information System(GIS)was applied to analyze the spatial variability of soil pH-value and soil nutrients including total P,available K in Shenyang city.The results showed that theoretical semivariogram models of pH-value,total P and available K were all best described by exponential model.The ratios of nugget to sill C0/(C0 C) of total P and available K were 10.62% and 9.94% respectively,which indicated that the spatial correlation of soil total P,available K was strong,their spatial variability was mainly caused by structural factors.The ratio of nugget to sill C0/(C0 C) of pH-value was 44.25%,which indicated that the spatial correlation of pH was moderate,its spatial variability was caused by random factors and structural factors.And the spatial distributions of pH,total P and available K in Shenyang city were analyzed by Kriging interpolation method. |
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| Keywords: | Geo-statistics Urban soil pH-value Soil nutrients Spatial variability |
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