林业与生态科学2025，Vol.40Issue(2)：182-188,219,8.DOI:10.13320/j.cnki.hjfor.2025.0021
黄土高原沟壑区土壤理化性质对不同植被结构的响应
Responses of soil physicochemical properties to different vegetation structures in the gully region of the Loess Plateau
摘要
Abstract
To explore the disparities in soil physical and chemical properties and their influen-cing mechanisms among different vegetation structures during the process of vegetation res-toration,shrub+grassland(GC),tree+grassland(QC),tree+shrub+grassland(QGC)in Yangjiagou and naturally restored grassland(C)in Dongzhuanggou were selected as research subjects.Comparative analyses were conducted on the variation characteristics of soil hydrological properties and physical and chemical properties under different vegetation structures.The results indicated that:(1)Compared with grassland,GC,QC,and QGC have better effects on increasing soil clay and silt particles and reducing soil sand particles,presenting an order of QGC＞QC＞GC＞C.(2)Compared with grassland,the contents of organic carbon and total nitrogen,as well as porosity,of the other three vegetation struc-tures increased,while the bulk density decreased.QGC had higher saturated hydraulic con-ductivity(24.6％-53.9％),saturated water content(25.1％-32.6％),and field water holding capacity(6.7％-44.2％).Moreover,it was discovered that with the increase in soil depth,saturated hydraulic conductivity,saturated water content,field water holding ca-pacity,contents of organic carbon and total nitrogen,and soil porosity all decreased,while the bulk density increased.(3)The results of the structural equation model reveal that soil bulk density,saturated water content,and field water holding capacity can directly affect Ks(saturated hydraulic conductivity),with path coefficients of-0.199,0.296,and 0.480,re-spectively;soil organic carbon,bulk density,and total nitrogen can indirectly affect Ks by influencing total porosity,field water holding capacity,and saturated water content.This study provides a scientific theoretical basis for the vegetation restoration path and soil hydro-logical effect process on the Loess Plateau.关键词
黄土高原/植被结构/土壤理化性质/饱和导水率(Ks)Key words
Loess Plateau/vegetation structure/soil physicochemical properties/saturated hy-draulic conductivity分类
农业科技引用本文复制引用
周琳,杜敏,杨晓楠,张爱军,荣国华,李博文..黄土高原沟壑区土壤理化性质对不同植被结构的响应[J].林业与生态科学,2025,40(2):182-188,219,8.基金项目
国家自然科学基金项目(42107346) （42107346）
河北农业大学引进人才专项项目(YJ2020009). （YJ2020009）
