南京林业大学学报（自然科学版）2024，Vol.48Issue(3)：108-116,9.DOI:10.12302/j.issn.1000-2006.202205039
毛竹林下植被演替过程中土壤颗粒组成与水分入渗特征
Soil particle distribution and water infiltration characteristics during vegetation succession in Phyllostachys edulis stands
摘要
Abstract
[Objective]The particle size composition,distribution,and water infiltration capability of soil in different soil layers of Phyllostachys edulis stands were measured.The response of soil particle size distribution and water infiltration capability to understory vegetation succession was revealed,which provides guidance for soil ecological management and vegetation renewal of P.edulis stands.[Method]The understory vegetation successional ages of 21,9 and 0 years in P.edulis stands were chosen for research.Soil particle size composition and fractal dimension of soil particle volume in different soil layers,as[0,10)cm,[10,20)cm,[20,30)cm of stands land were measured.Soil water infiltration capability was simulated by using Kostiakov,Philip and Horton models.The relationships among soil fractal characteristics,particle composition,and water infiltration capability were analyzed.[Result]For P.edulis forests with the same understory successional years,soil clay content,silt content,fractal dimension,and water infiltration capability decreased with the increase of soil depth,while sand content increased gradually.With the extension of vegetation succession years,the content of clay and silt as well as fractal dimension decreased gradually in the[0,10)cm soil layer,while the sand content increased gradually.The clay and silt contents and fractal dimension in[10,20)cm and[20,30)cm soil layers increased first and then decreased,but the sand content changed in the opposite direction.The initial infiltration rate and stable infiltration rate of all soil layers showed an increasing trend with the extension of successional age.Soil fractal dimension was positively correlated with clay particle content,initial infiltration rate,and stable infiltration rate(P＜0.05),but negatively correlated with sand particle content(P＜0.05).The Kostiakov and Horton models are more suitable for the simulation of soil water infiltration process in experimental P.edulis stands.[Conclusion]Vegetation succession under P.edulis stands can significantly improve soil water particle structure and enhance soil water infiltration capability,and the succession time effect is obvious.Soil water infiltration capability of P.edulis in the older 21-year successional understory age was better than that of the younger 9-year and pure bamboo stands.关键词
毛竹/植被演替/土壤粒径/分形特征/土壤水分入渗性能Key words
Phyllostachys edulis/vegetation succession/soil particle size/fractal characteristic/soil water infiltration capability分类
农业科技引用本文复制引用
谢燕燕,郭子武,林树燕,左珂怡,杨丽婷,徐森,谷瑞,陈双林..毛竹林下植被演替过程中土壤颗粒组成与水分入渗特征[J].南京林业大学学报（自然科学版）,2024,48(3):108-116,9.基金项目
浙江省重点研发项目(2020C02008). （2020C02008）
