山杨枯枝落叶的水文水保作用研究

HYDROLOGICAL AND WATER CONSERVATIVE FUNCTION OF LITTERFALL IN THE STANDS OF POPULUS DAVIDIANA

山杨枯枝落叶的水文水保作用研究赵鸿雁，吴钦孝，刘向东（中国科学院西北水土保持研究所，水利部西北水土保持研究所杨陵７１２１００）关键词山杨，枯枝落叶，水文，水土保持自１８６８年巴乌尔研究森林枯枝落叶的持水性以来到目前，国内外关于枯枝落叶的研究已发表了许...

A study was carried out in the natural stands of Populus davidiana in the area of Loess plateau,northwestern China,to observe the hydrological and soil conservative function of litterfall.It was found that the amount of litterfall was the highest in October and the interception rate of litter reached 18.9%.Evaporation of soil water, which was restrained by litter and affected by soil moisture content,was reduced with the increment of the thickness of litter layer in the stands. The occurrence of streamflow varied directly with the thickness of litter layer and negatively with the degree of slope and the streamflow depth.The study also showed that soil loss damping was improved to 83.2% by 1cm thick layer of litter on the ground.the streamflow and sedimentation were increased by 1.66 and 8.15 times,respectively,as the litter was removed from the ground.