Effects of plant roots on soil preferential pathways and soil matrix in forest ecosystems

作     者：Yinghu Zhang Jianzhi Niu Weili Zhu Xiaoqing Du Jiao Li 

作者机构：Key Laboratory Soil and Water Conservation and Desertification CombatingMinistry of EducationCollege of Soil and Water ConservationBeijing Forestry University 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2015年第26卷第2期

页      面：397-404页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 09[农学] 0829[工学-林业工程] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：supported by a grant from the Natural Science Foundation of China(41271044) 

主　　题：Preferential flow Preferential pathways Soil matrix Root length density Root biomass 

摘      要：To characterize effects of plant roots on preferential flow（PF）,we measured root length density（RLD）and root biomass（RB） in Jiufeng National Forest Park,Beijing,China.Comparisons were made for RLD and RB between soil preferential pathways and soil matrices.RLD and RB declined with the increasing soil depth（0–10,10–20,20–30,30–40,40–50,50–60 cm） in all experimental plots.RLD was greater in soil preferential pathways than in the surrounding soil matrix and was 69.5,75.0 and72.2 % for plant roots of diameter（d） ／1,1 ／ d ／ 3 and3 ／ d ／ 5 mm,respectively.Fine root systems had the most pivotal influence on soil preferential flow in this forest ecosystem.In all experimental plots,RB content was the sum of RB from soil preferential pathways and the soil matrix in each soil depth.With respect to 6 soil depth gradient（0–10,10–20,20–30,30–40,40–50,50–60 cm） in each plot,the number of soil depth gradient that RB content was greater in soil preferential pathways than in the soil matrix was characterized,and the proportion was68.2 % in all plots.