水土保持学报2012，Vol.26Issue(6)：68-74,7.
基于点格局分析的林地表层土壤优先路径水平分布特征
Horizontal Distribution Characteristics of the Preferential Flow Paths in Surface Soil of the Forest Land Based on the Spatial Point Pattern Analysis
摘要
Abstract
This paper attempts to investigate the horizontal spatial distribution with spatial point pattern analysis method.The Ripley's K(x) function of point pattern analysis and multivariate point pattern analysis were adopted to analysis the spatial position of the preferential flow paths and the relationship between the biological activity and the preferential flow paths of different radius of influence on the topmost 10-20 cm of the soil in coniferous forest,broadleaf forest,and mixed forest in Simian mountains of Chongqing province.The results showed that the distribution of preferential flow paths was significant accumulation with spatial scales in radius of 0-15 cm,while the spatial scale 〉15 cm,the preferential flow paths distribution trended to uniform.There was significant positive correlation between biological activity and most of the preferential flow paths on different scales.The amount of preferential flow paths with lower radius of influence decreased with the increase of the amount of preferential flow paths with higher radius of influence.These findings suggest that the horizontal spatial distribution of preferential flow paths could be well reflected by the point pattern analysis method.The relationship between biological activity and the preferential flow paths and the relationship between preferential flow paths with different radius of influence could be explained from the point of mathematical analysis of spatial pattern.The method is suitable to quantitatively analysis the characteristics of horizontal spatial distribution of the preferential flow paths.关键词
优先路径/点格局分析/空间分布/尺度/生物活动Key words
preferential flow paths/spatial point pattern analysis/spatial distribution/scales/biological activity分类
农业科技引用本文复制引用
吕文星,张洪江,吴煜禾,程金花,王伟..基于点格局分析的林地表层土壤优先路径水平分布特征[J].水土保持学报,2012,26(6):68-74,7.基金项目
国家自然科学基金项目 （）
林业公益性行业专项 （）
中央高校基本科研业务费专项 （）
