摘要
为定量评价阴山北麓干旱半干旱区不同地表土壤的抗风蚀效果,采用野外风洞原位测试方法进行试验研究。结果表明:风速一定时,退化草地、传统耕作农田的风蚀模数明显高于相应的无退化草地和保护性耕作农田;无退化草地和保护性耕作农田的风蚀模数曲线随风速变化平缓且不存在转变临界点。风速为18 m/s时,无退化草地、保护性耕作农田的抗风蚀效率分别可达85.1%和90.8%,对8级大风具有较好的抗风蚀效果。
The test was carried out on the real surfaces by means of the movable wind tunnel in order to evaluate quantatively the anti-erosion effect of different surfaces＇ soil in arid and semi-arid regions in north areas of Yinshan Mountain. The result shows that the erosion modules of degenerated grassland and traditional tillage farmland are much more than those of non-degenerated grassland and conservation tillage farmland when wind velocity is constant. Their wind erosion modules vary gently with wind velocity changing and there is not critical point of wind erosion modules. The anti-erosion efficiencies of non-degenerated grassland and conservation tillage farmland can reach 85. 1 percent and 90. 8 percent when the wind speed reaches 8 m/s . They have obvious anti-wind erosion capabilities to 8 level wind or so.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2007年第12期1-5,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
高等学校博士学科点专项基金项目(20050129007)
教育部研究生教育创新计划项目-中国农业大学西部地区高校博士研究生访学项目(编号R-0604)资助
关键词
干旱半干旱区
土地荒漠化
风蚀模数
抗风蚀效率
风蚀量计算
arid and semi-arid regions, soil wilderness
wind erosion module, anti-erosion efficiency
calculationof the wind-blown mass
