鹫峰国家森林公园不同林分下土壤优先流现象研究  

Soil Preferential Flow under Different Forest Stands in Jiufeng National Forestry Park

作　　者：肖自幸[1] 朱蔚利[1] 牛健植[1] 邵文伟[1] 张由松[1] 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院,北京100083

出　　处：《湖南农业科学》2011年第9期118-121,共4页Hunan Agricultural Sciences

基　　金：国家青年自然科学基金(30800888)

摘　　要：优先流是土壤中普遍存在的一种水分和溶质运移现象,为初步了解土石山区植被下的土壤水分运动,用亮蓝野外染色示踪试验研究了位于北京西北部的鹫峰国家森林公园不同林分下土壤中的优先流。从染色结果来看:在3种不同林分下的土壤中均存在较明显的优先流现象,且不同林分下土壤优先流的表现形式不同。染色面积的百分比显示了示踪剂在剖面上的分布,反映出部分水分通过优先流直接进入到土壤下层。优先流的存在对土石山区降雨条件下的水文过程产生重要影响。Preferential flow is a common phenomenon of water and solute transport in soil. In order to understand the water movement under vegetation in rocky mountain area, the soil preferential flow under different forest stands in Jiufeng National Forestry Park in northwest Beijing was researched hy using brilliant blue dye tracer method. The results showed that the preferential flow exists in the three different forest stands and the expression forms were different under different forest stands. The percentage of dyed area showed the tracer distribution in the profile, and it reflected some water reaeh the bottom of soil through the preferential flow channels. The presence of preferential flow has an important impact on the hydrological processes under rainfall conditions in earth-rocky mountainous area.

关 键 词：不同林分 土壤 优先流 染色示踪 

分 类 号：S718.54[农业科学—林学]