中文摘要：

将景观生态学中的空间点格局分析方法应用于土壤优先路径的水平空间分布研究,采用Ripley’s K（x）函数单种点格局分析及多元点格局分析方法,对重庆四面山针叶林地、阔叶林地及针阔混交林地10-20cm土壤深度上不同影响半径范围优先路径的空间位置及其与土壤生物活动的关系进行分析,经Monte-Carlo方法检验,发现优先路径在0-15cm土壤水平剖面半径尺度上呈聚集分布,〉15cm尺度向均匀分布发展;在不同尺度上与生物活动呈显著正相关关系;较小影响半径范围优先路径的空间分布数量随较大影响半径范围优先路径的空间分布数量的增加而减小。结果表明,空间点格局分析能较好地反映优先路径在土壤水平空间分布的状态,并能从数学空间形态分析角度解释土壤优先路径水平空间分布与生物活动的关系,以及不同影响半径范围优先路径间的分布关系,适用于量化分析土壤优先路径水平空间分布特征。

英文摘要：

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.