柠条林防风阻沙效益模拟研究初报  

Simulating efficiency of wind-speed reduction and sand-break of Caragana korshinskii coppice

作　　者：高函[1] 张宇清[1,2] 吴斌[1,2] 丁国栋[1,2] 

机构地区：[1]北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室 [2]宁夏盐池荒漠生态系统定位研究站

出　　处：《北京林业大学学报》2010年第4期175-180,共6页Journal of Beijing Forestry University

基　　金："十一五"国家科技支撑计划项目(2006BAD26B03)

摘　　要：采用人工插植的方法,模拟了3种不同配置的柠条灌木矮林,对其剖面风场以及输沙率进行了观测。结果表明:1行配置防风效能较低,2行和3行配置防风效能较高;且随着风速的增大,3种配置的防风效能存在不同趋势,1行矮林维持在10%以下,2行矮林呈现先增大后减小的单峰趋势,3行矮林稳定在较高水平。从输沙率来看,2行和3行配置也优于1行;1行矮林在其背风面7h(h为树高)内都能减少风蚀,而2行和3行矮林在其背风面10h处都能有效减少输沙率,防控风蚀。灌木矮林能有效增加粗糙度,在林带后的粗糙度呈递减趋势。Using a method of insert planting,we investigated the wind fields and sand discharge rates of three arrangements of belt scheme Caragana korshinskii coppice.The results show that the efficiency of windspeed reduction of a single belt scheme is low,while that of double and triple belts is high.With an increase in wind speed,the arrangement of three belt schemes had different effects on wind-speed reduction.The efficiency of wind-speed reduction by a single belt remained below 10% ;the efficiency of double belts increased at first,and then decreased,while that of the triple belts remained a high level.The sand discharge rate of a single belt was higher than that of double and triple belts.A single belt could decrease the sand discharge rate at a distance of 7h to leeward,while double and triple belts at a distance of 10h.C.korshinskii coppice increased the roughness,which declined behind the belts with an increase in the distance to leeward.

关 键 词：柠条林 模拟试验 防风效能 输沙率 粗糙度 

分 类 号：S793.3[农业科学—林木遗传育种]