干旱地区农业研究2016，Vol.34Issue(4)：55-61,7.DOI:10.7606/j.issn.1000-7601.2016.04.09
压砂地土壤导水特性空间格局及影响因子
Spatial variability of soil saturated hydraulic conductivity and its influencing factors in the gravel mulched field of Ningxia
摘要
Abstract
Spatial variability of soil saturated hydraulic conductivity and its influencing factors could lay the scientif-ic basis for soil water and soil desiccation management in mulched field .The classical and geological statistics were com-bined to identify the spatial variability of soil saturated hydraulic conductivity and its influencing factors at 0~10 cm and 10~20 cm depths with 10 m × 10 m grids .The classical statistics indicated that at the 0~10 cm and 10~20 cm depths the soil bulk density ,total porosity and capillary porosity showed light variation ,saturation moisture content ,soil organic matter showed moderate variation ,while soil saturated hydraulic conductivity had moderate and wide variation at the 0~10 cm and 10~20 cm depths ,respectively .The capillary porosity was the key factors influencing saturated hydraulic conductivity by Pearson correlation analysis ,followed by bulk density ,total porosity ,saturation moisture content and soil organic matter content .The geological statistics indicated that saturated hydraulic conductivity at the 0~10 cm depths was basically affected by random factors with pure nugget variograms ,while at the 10~20 cm depths primarily affected by structural factors .At the 0~10 cm and 10~20 cm depths ,the spatial variability of soil bulk density was mainly af-fected by random factors .According to the spatial distribution patterns ,saturated hydraulic conductivity was highly nega-tive correlated with bulk density ,while was high positively related to saturation moisture content ,total porosity and capil-lary porosity .关键词
压砂地/土壤饱和导水率/地统计/克里格插值Key words
gravel mulched field/soil saturated hydraulic conductivity/geostatistical statistics/kriging interpolation分类
农业科技引用本文复制引用
白一茹,王幼奇,王菲,王建宇..压砂地土壤导水特性空间格局及影响因子[J].干旱地区农业研究,2016,34(4):55-61,7.基金项目
宁夏高校科学研究项目（NGY2013031，NGY2013028）；宁夏大学人才引进科研启动基金（BQD2012012）；国家自然科学基金 （）
