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风沙土开垦中的风蚀研究
引用本文:董治宝,陈渭南,李振山,杨佐涛.风沙土开垦中的风蚀研究[J].土壤学报,1997,34(1):74-80.
作者姓名:董治宝  陈渭南  李振山  杨佐涛
作者单位:中国科学院兰州沙漠研究所
基金项目:*国家“八·五”重点科技攻关项目(85-910-03)资助
摘    要:针对以往对土壤风蚀与土地开垦的关系缺乏定量研究,本文以野外实地采集的风沙土样为实验材料,对土地开垦过程中影响风蚀的两个主要因素-地表破坏与植被破坏分别进行风洞实验,结果表明,土壤风蚀率随地表破坏率的增大呈二次幂函数增加;随植被盖度的减少呈指数增加。综合地表破坏及植被盖度对土壤风蚀的影响,最后得出,土壤风蚀率随土地开垦率的增大呈指数增大。在此基础上提出了风沙土开垦中,有效地防止土壤风蚀需要掌握的临界

关 键 词:风沙土  风蚀率  地表破坏率  植被盖度  土地开垦率
收稿时间:1994/9/10 0:00:00
修稿时间:1/8/1996 12:00:00 AM

STUDY ON WIND EROSION OF AEOLIAN SAND SOIL UNDER RECLAMATION
Dong Zhibao,Chen Weinan,Li Zhenshan and Yang Zuotao.STUDY ON WIND EROSION OF AEOLIAN SAND SOIL UNDER RECLAMATION[J].Acta Pedologica Sinica,1997,34(1):74-80.
Authors:Dong Zhibao  Chen Weinan  Li Zhenshan and Yang Zuotao
Institution:Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000;Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000;Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000;Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000
Abstract:By a wind tunnel experiment with an aeolian sand soil sample collected from a field, a study was carried out to ascertain the wind erosion characteristics of the soil under reclamation. Two factors influencing soil wind erosion, surface destruction and vegetation coverage were studied. After a seies of laboratory work, the quantitative relationships between wind erosion rate and surface destruction rate and between wind erosion rate and vegetation coverage percentage were established. It was found that the former relationship complied approximately with a second power function, while the latter could be expressed by an exponential function.By means of computerized simulation the correlation between wind erosion rate and land reclamation rate was found to follow an exponential function. Furthurmore, some surface destruction, vegetation coverage and land reclamation thresholds are suggested to prevent aeolian sand soils from wind erosion, and some required soil conditions and measures of aeolian sand soils to be reclaimed for wind erosion control are pointed out in the present article.
Keywords:Aeolian sand soil  Wind erosion rate  Land surface destruction  Vegetation coverage  Land reclamation
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