罗布泊地区土壤多样性研究

Studies on Soil Dodiversity in Lop Nor Lake Area

【目的】利用土壤多样性理论方法分析罗布泊地区的土壤多样性。【方法】利用ArcGIS对空间数据进行矢量化,获得空间数据的属性值。多样性指标的计算和成图则在Excel中完成。【结果】罗布泊地区土壤类型单一。在地形地貌上,石膏质盐壳上发育的土壤亚类,其丰富度指数、多样性指数和均匀度值都很高;在地质构造单元新生代盆地上发育的土壤亚类,其丰富度指数和多样性值数是最高的,但是均匀度却是最低的。面积与丰富度指数、多样性指数与均匀度指数之间均符合二次多项式函数关系。【结论】土壤多样性受到土壤分类精度、地块单元面积以及所包含各亚类面积等综合因素的影响。

【Objective】To analyze the soil diversity of Lop Nor by soil diversity theory and measure method.【Method】To obtain the spatial properties by vectorization way based on ArcGIS and diversity index and statistical data based on Excel software.【Result】 There is few soil group in Lop Nor.On the different terrain unit,richness,diversity and uniform indices with the soil subgroup distribution of gypseous salt crust are very high;On the different geologic unit,richness and diversity indices with the soil subgroup distribution of cainozoic basin are the highest,but,the uniform indices are the lowest.Totally,correlation between unit area and richness,diversity and uniform fit quadratic equation.【Conclusion】Soil diversity is affected by comprehensive factors including soil classification,unit area,soil subgroup area and so on.