基于GIS和地统计学的黔西北农业园区土壤养分空间变异特征研究

以黔西县水西观光农业示范园区(乌骡坝社区)为研究区域,采用地统计学方法,研究了黔西北山区土壤pH值、有机质、碱解氮、有效磷、速效钾、全氮、全磷、全钾的土壤养分状况及空间变异规律。结果表明：(1)土壤pH值表现为弱变异性,其余各项指标变异均属于中等程度变异；(2)土壤pH、有机质、碱解氮、有效磷、速效钾和全氮均是中部分布较低,全磷是中部分布较高,有机质是北部和南部分布较高；速效钾是东部分布较高,全氮和全钾北部分布最高；(3)土壤有机质C0 /(C0 +C)=31.935%,表现为中等空间相关性,其余各土壤养分指标均表现为强烈的空间相关性。

Spatial Variation Characteristics of Soil Total Nitrogen and Organic Matter in agricultural demonstration zone of Northwest in Guizhou Based on GIS and Geostatistics

Using geo-statistics methods,an invstigation was conducted on the spatial variability of soil pH, organic matter, t available N, P, K, and total N, P, K in Shuixi Sightseeing agriculture demonstration zone of Qianxi County (Wuluoba Communities). The results showed that pH was weak variability and the reaining indicators were medium variability, pH, organic matter, t available N, P, Kand total N were lower distributiton in the central region, organic matter were higher distribution in northern and southern regions, available K was high est distribution in eastern region, total N ,K were highest distribution in northern regions.The C0 /(C0 + C) was 31.935% of organic matter, showing a medium spatial correlation, and the reaining indicators indicating showing strong spatial correlations.