宁夏引黄灌区土壤饱和导水率空间分异特征

发布时间：2018-11-07 09:59

【摘要】：以宁夏引黄灌区农田土壤为例,采用10m×10m网格布点的方式,运用经典统计学和地统计学对土壤饱和导水率及相关因素的空间变异特征进行研究分析。结果表明:饱和导水率属于强烈变异;毛管孔隙度、饱和含水量和有机质属于中等变异性;容重和总孔隙度属于弱变异性。地统计结果表明,饱和导水率、饱和含水量和毛管孔隙度是随机性因素和结构性因素共同作用的结果;容重、总孔隙度和有机质主要受结构性因素影响。由其空间变异克里格插值图可知,饱和导水率有较明显的分布规律,但在局部区域呈现出高异质性;其余土壤性质均具有明显的分布规律。Pearson相关性分析可知,影响土壤饱和导水率的主要因素是总孔隙度和容重,依次为饱和含水量、毛管孔隙度和有机质含量。通过分析土壤饱和导水率及其相关因素的空间变异特征可为该地区土壤水分有效利用和农田管理等提供一定的参考依据。
[Abstract]:Taking farmland soil in Ningxia Yellow River Irrigation area as an example, the spatial variation characteristics of soil saturated water conductivity and related factors were studied and analyzed by using classical statistics and geostatistics. The results show that saturated water conductivity is a strong variation, capillary porosity, saturated water content and organic matter belong to medium variability, bulk density and total porosity belong to weak variability. The results of geostatistics show that saturated water conductivity, saturated water content and capillary porosity are the result of both random and structural factors, and bulk density, total porosity and organic matter are mainly affected by structural factors. From its spatial variation Kriging interpolation, it can be seen that saturated water conductivity has obvious distribution law, but it shows high heterogeneity in local area. Pearson correlation analysis showed that the main factors affecting soil saturated water conductivity were total porosity and bulk density, followed by saturated water content, capillary porosity and organic matter content. The spatial variation characteristics of soil saturated water conductivity and related factors can provide some references for the effective use of soil water and farmland management in this area.
【作者单位】：宁夏大学资源环境学院;
【基金】：国家自然科学基金资助项目(41461104) 宁夏自然科学基金资助项目(NZ14028)
【分类号】：S152.7

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