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Study on Benefits of Soil and Water Conservation of Forest and Its Mechanism in Loess Hilly Region
Authors
侯喜禄
曹清玉
白岗栓
Publication date
1 January 1996
Publisher
Abstract
刺槐、柠条、沙棘、沙棘×油松、沙棘×小叶杨幼林到郁闭成林的蓄水保土效益变化分3个阶段。1~3年生为低下阶段,有侵蚀性降雨就会发生水土流失;4年生为由低到高的过渡阶段,蓄水保土效益迅速增加,5年生以上为效益显著阶段。一般在无大暴雨情况下基本不发生水土流失,且60%的林分覆盖度对减少土壤侵蚀量的作用显著。各郁闭成林的枯落物蓄积量和容水量以沙棘及其混交林最多,刺槐林中等,柠条林最少。并且枯落物的厚度是增强土壤抗冲性效应的重要指标。同时森林改善了土壤物理性质,使土壤容重变小,入渗和抗冲性增强
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018