水土保持学报2024，Vol.38Issue(4)：300-311,12.DOI:10.13870/j.cnki.stbcxb.2024.04.028
喀斯特马尾松林下路径区域的土壤特性差异与水分空间变异性
Differences in Soil Properties and Spatial Variability of Water in the Understory Path of Karst Masson's Pine
摘要
Abstract
[Objective]To investigate the spatial variability of trail soils under the influence of anthropogenic trampling in the understory social activities in karst areas.[Methods]To investigate the spatial and temporal variability of soil properties in the 0-20 cm soil layer under drought and precipitation conditions,we took the karst forest trail area as the research object,regularly sampled the soil at a fixed piont on a monthly scale.Geostatistical analyses were performed to assess the spatial and temporal variability of soil properties and their distribution patterns under both drought and precipitation conditions.[Results]Anthropogenic trampling can alter the structure of the soil surface(0-15 cm)and subsurface by increasing soil consolidation and the aggregation capacity of soil particles.The spatial distribution of soil water content in karst forests trails showed moderate variability,with higher values observed in the center of the trails(32.68％)compared to the trail edges(28.46％)and the forest interior(26.99％).Soil compactness and shear strength followed a similar pattern,being highest at the center of the trail,followed by the trail edge,and lowest in the forest interior.Vegetation cover was weakened by anthropogenic trampling,resulting in an increased response time of soil water content to rainfall events.Stochastic factors had a relatively greater influence on soil surface water content but overall showed strong spatial autocorrelation(＜25％).Under changing meteorological conditions,both nugget and sill values for soil moisture in the surface layer of forest trails were negatively correlated with mean soil moisture content.The spatial distribution of soil moisture was modeled using range R under drought and precipitation conditions as 30.89 and 39.49 m respectively,with Gaussian model showing optimal fit(R2＞0.97).Kriging contour plots revealed patchy distribution patterns for soil moisture along forest trails,which exhibited better spatial continuity under precipitation conditions.[Conclusion]Substantial guidance for the implementation of woodland ecological restoration strategies and the development of more accurate soil sampling density programmers in karst areas.关键词
喀斯特山地/土壤含水量/时空变异/森林土壤/人为踩踏Key words
Karst mountains/soil water content/spatial and temporal variability/forest soil/anthropogenic trampling分类
农业科技引用本文复制引用
李雨涵,陈浩,冯娜,李瑶,刘冬冬..喀斯特马尾松林下路径区域的土壤特性差异与水分空间变异性[J].水土保持学报,2024,38(4):300-311,12.基金项目
国家自然科学基金项目(42067004) （42067004）
贵州省科技基金项目(YQK[2023]005) （YQK[2023]005）
