摘要
本文对雄县试区试验田的土壤特性空间变异性进行经典统计分析，并利用地质统计学半方差分析法定量描述土壤特性的空间相关结构，然后使用Ｋｒｉｇｉｎｇ最优内插估值法得到了田间土壤特性参数的空间分布等值图。分析结果表明，该试验田０～１００ｃｍ土壤范围内的平均含水量不仅在整个空间分布上而且在纵横曲型剖面上都呈现出弱变异性，空间相关结构显著，相关距离约６０～８０ｍ。采用上述结论和等值图不但能减少样本采样的数量和密度，还能根据田间含水量的空间分布特征合理布点采样，实施土壤墒情的科学监测。
The purpose of this paper is to:(1)analyze the spatial variability of soil properties in the plot area of Xiongxian demonstration pilot district by classical statistic method;(2)describe the spatial structure of soil properties by geostatistical techniques; (3)use the kriging interpolation technique to estimate their spatial distribution over the entire plot area. The results indicate that the average soil water content in a range of 0-100cm depth tends to show a lower variability due to low Cv values, and the data show clearly spatial correlation with a range of dependence of 60～80 m. Based on the analysis mentioned above, a scientific plan for soil water content monitoring in the plot area will be carried out in the future through the design of efficient sampling schemes.
出处
《灌溉排水》
CSCD
1996年第4期16-20,共5页
Irrigation and Drainage
关键词
土壤特性
空间相关结构
变异性
内插估值
Soil properties
Spatial structure
Variability
Interpolation technique
