均匀式沙蒿防风阻沙效益模拟试验研究  

Simulation Test on Sand-Arresting Effect of Evenly Distributed Artemisia desertorum

作　　者：王翔宇[1,2] 丁国栋[1,2] 吴斌[1,2] 张宇清[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,北京100083 [2]北京林业大学宁夏盐池荒漠生态系统定位研究站,宁夏盐池751500

出　　处：《中国水土保持》2010年第2期42-44,共3页Soil and Water Conservation in China

基　　金："十一五"国家科技支撑计划课题(2006BAD26B0301)资助

摘　　要：沙蒿广泛分布在半固定沙地、固定沙地,是固沙造林的理想植物,研究沙蒿的防风阻沙效益对沙区人工植被建设和土壤风蚀防控具有十分重要的理论指导意义。利用HOBO多剖面自计式遥测风速廓线仪和组合式多通道通风集沙仪,对盖度分别为20%、30%、40%、50%、60%、70%的人工模拟均匀式沙蒿林内风速、粗糙度、近地表输沙率等进行了观测。结果表明,盖度50%是均匀式沙蒿的一个临界点,当植被盖度不大于50%时,随着植被盖度的增大,林内近地表风速逐渐降低,粗糙度逐渐增大,近地表输沙率逐渐减小;当植被盖度大于50%时,随着盖度增加,林内的近地表风速、粗糙度、近地表输沙率并无明显变化。Artemisia desertorum is an ideal plant for sand-fixing afforestation which widely distributed in fixed and semi-fixed sandy ground. It is of great importance for theoretical guidance to study the sand-arresting effect of Artemisia desertorum to artificial vegetation and wind erosion protection and control in sandy areas. It observes wind speed,roughness,sediment transport rate near-surface in simulated evenly distributed Artemisia desertorum with the coverage degrees of 20%,30%,40%,50%,60% and 70% respectively by using HOBO multiple-sensor automatic anemoscope and combined type multi-channel sand collector. The outcomes show that the coverage of 50% is a critical point,when coverage degree is increased and less than 50%,wind speed near-surface will be decreased,roughness increased and sediment transport rate near-surface decreased gradually; when the coverage degree is greater than 50%,the wind speed,roughness,sediment transport rate near-surface within the forest have no obvious difference along with the increase of coverage.

关 键 词：沙蒿林 模拟试验 防风效能 输沙率 粗糙度 

分 类 号：S157.2[农业科学—土壤学] P941.73[农业科学—农业基础科学]