摘要
在烟台一果园内进行土壤含水量采样后,对土壤水分空间变异特征和土壤水分适宜采样间距进行了研究。结果表明土壤水分实验变异函数符合球状模型,土壤水分空间分布存在几何各向异性,各向异性比为1.01,方向容差为60°,0°方向的滞后距离最大为6.7 m,90°方向的滞后距离最小为4.4 m;对比了东西方向5.7 m、11.4 m、17.1m和南北方向3 m6、m等不同采样间隔的插值精度,结果表明本果园适宜的采样间隔东西方向为5.7 m,南北方向为3 m。
After sampling in an orchard of Yantai city, researching on soil water spatial variability and proper soil water sampling distance were conducted. Results showed that soil water experiment variance function display a spherical model, the spatial distribution of soil water content was geometrical heterogeneous,the ratio was 1.01, the tolerance was 60°,the longest lag distance was 6.7 m in 0°direction,and the shortest lag distance was 4.4 m in 90°;The interpolation precision of different sampling distance of 5.7 m, 11.4 m, 17. 1 m in west-east direction and 3 m, 6 m in north-south direction were compared, etc. Results showed that the proper sampling distance of this orchard were 5.7 m in west-east direction and 3 m in north-south direction.
出处
《水土保持研究》
CSCD
北大核心
2006年第6期311-313,318,共4页
Research of Soil and Water Conservation
基金
烟台师范学院重点基金项目(043201)
人才引进基金(000444)资助
鲁东大学大学生科技创新基金
关键词
半变异函数
土壤水分含量
插值
采样间距
果园
semi-variance function
soil water content
interpolation
sampling distance
orchard
