摘要
川中防护林林分类型不同，承受降雨过程产生的地表径流和土壤侵蚀产沙量也不同，钙质紫色土上其减水减沙贡献最大的是落叶灌木林，其次是桤柏混交林，主要是枯枝落叶层的作用，马尾松疏林土壤侵蚀量是马尾松柏木林的２．７倍。随着降雨量增大和雨强增强，冰碛黄土上松柏混交林减水减沙效益最大，是一种川中地区典型的水土保持林类型。针叶林的削减水沙的作用是有限的。松柏混交林产沙率变化与该林分下洪峰流量变化相一致。马尾松疏林产沙率过程线随流量增大变得陡峻。
Various kinds of protection forest of the changjiang River in middle Sichuan will bring about different surface runoff and erosion sand yield during a rainfall process.As far as calcic purple soil is concerned,deciduous forest and shrubbery have a very great effect in the reduction of water and sand,and mired alder and cypvess forest second.This paper alss report other researches concerned.
出处
《四川林业科技》
北大核心
1996年第3期16-22,共7页
Journal of Sichuan Forestry Science and Technology
关键词
防护林
紫色土
减沙
土壤侵蚀
Proteetion forest of the changjiang River in middle Sichuan purple soil Sand reduction
