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OALib Journal期刊
ISSN: 2333-9721
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小流域土壤有机质和全磷空间变异分析――以安徽省舒城县龙潭小流域为例
DOI: 10.3724/SP.J.1145.2011.00169, PP. 169-173
Keywords: 土壤有机质,土壤全磷,空间变异,地统计学,各向同性,各向异性,克立格插值
Abstract:
为了解土壤的地域差异性，基于地统计学半方差函数理论和gis空间克立格插值定量分析了安徽省舒城县龙潭小流域有机质、全磷的各向同性、各向异性变异特征及分布格局.结果表明，有机质、全磷的半方差拟合模型均为指数模型，两者的分布都显示了强烈的空间自相关，自相关距离分别为642m、435m.有机质、全磷变异的各向异性都比较显著，有机质在0°、50°方向上变异程度明显大于90°、145°方向；全磷则在0°、145°方向的变异程度更加突出.有机质、全磷的分布呈明显的块状和带状，其中有机质中部含量高，南部、西部含量低；全磷则是南部、西北含量高，西部、东北含量低.图6表3参18
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