铲运机复垦重构土壤容重值的时空变异特性

Time-Space Variation of Bulk Density of Reconstructing Soil Reclaimed by Scraper

基于复垦重构土壤物理性状的重要性,采用网格取样法对三块不同时间的铲运机复垦重构土壤以及一块普通农田进行了取样化验,求得容重值,然后应用地质统计学理论的克立格方法,研究了铲运机复垦重构土壤容重属性的时空变异性.结果表明:实验田1和实验田2为正态分布,实验田3为对数正态分布.三块实验田的半变差函数模型以纯块金效应模型占多数.铲运机复垦重构土壤的容重值比普通农田偏大.

Based on the importance of understanding the physical characteristics of reconstructing soil reclaimed by scraper, the soil bulk density was obtained by girding sampling method in three reclaimed plots with different reclaiming times and a normal farmland plot. The time-space variation of soil bulk density was studied by Geostatistics and Kriging. The results show that soil bulk density was a normal distribution in both plot 1 and plot 2, but logarithm normal distribution in plot 3, and most of the half-variation models were the pure nugget model. The bulk density of reconstructing soil reclaimed by scraper was larger than that of normal farmland.