龙须草蓄水保土机理及效益研究  

Mechanism of Soil and Water Consevation and Its Benefit of Eulaliopsis binata

作　　者：邹冬生[1] 余铁桥[1] 周青[2] 阳树英 

机构地区：[1]湖南农业大学植物科技学院,湖南长沙410128 [2]湖南农业大学环境资源学院,湖南长沙410128

出　　处：《农业现代化研究》2000年第4期210-213,共4页Research of Agricultural Modernization

基　　金：湖南省"星火西进工程"重点项目

摘　　要：本研究结果指出 ,龙须草具有较好的蓄水作用 (包括草层截雨、土壤贮水 )和保土作用 (包括根系固土、防治水土流失 )。其中截雨作用效果大小 ,在草层覆盖率为 92 %以上的情况下主要取决于草层厚度 ,草层厚度越大 ,截雨作用效果越大 ;土壤贮水作用效果大小 ,主要取决于草层覆盖率和根系生长量 ,草层覆盖率和根系生长量越大 ,土壤贮水作用效果越大 ;根系固土作用效果大小 ,主要取决于根系生长量 ,根系生长量越大、根系固土作用效果越大 ;而防治水土流失作用效果大小 ,主要取决于草层覆盖率和降雨量 ,在草层覆盖率大于 84% ,而且日降雨量小于或等于 79.3mm的情况下 。The present experiment was conducted to clarify the mechanism of soil & water conservation and its benefit of Eulaliopsis binata in the west part hillland of Hunan province. The results were as follows:① Eulaliopsis binata conservated soil & water by intercepting rain fall with leaf canopy, increasing soilwater deposit and fixed soil capacity and preventing soil erosion. ② The capability of intercepting rainfall of the leaf canopy was effected mainly by the leaf canopy thickness. The capabilities of increasing soilwater deposit, and fixed soil capacity was effected mainly by the leaf canopy thickness and the growing stock of the root system. The capability of preventing soil erosion was effected mainly by the leaf canopy thickness and precipitation.

关 键 词：龙须草 蓄水保土 效益 水土流失 保土植物 

分 类 号：S157.433[农业科学—土壤学]