灌木林优化配置格局对土壤风蚀的影响  

Influence of shrub optimal configuration pattern on soil wind erosion

作　　者：冯泽深[1] 高甲荣[1] 崔强[1] 贺康宁[1] 

机构地区：[1]北京林业大学教育部水土保持与荒漠化防治重点实验室,北京100083

出　　处：《干旱区资源与环境》2010年第1期179-183,共5页Journal of Arid Land Resources and Environment

基　　金：国际科技合作项目(2008DFA32270);国家自然科学基金项目(40771128)资助

摘　　要：低覆盖度时,灌木林的水平配置格局成为制约土壤风蚀的重要因素。以宁夏盐池县风沙区人工灌木林基地为试验区,研究了不同下垫面类型和不同配置格局的灌木沙障对风速、近地表输沙率和地表粗糙度的影响。结果表明:灌木林的防治土壤风蚀能力与灌木林的种类、高度和配置格局有直接关系:行带式配置能显著提高灌木林的防风效果,其中以沙柳林效果最佳;三行一带、平均高1.5m、行距1.5m、插深0.5m配置规格的沙柳沙障对地表土壤风蚀的控制效果最好,但防护范围限15倍带高以内;在行数一定的情况下,沙障高度越低,控制土壤风蚀能力越强。When vegetation cover is low, the horizontal distribution pattern of shrubs is become the important restrictive factor of soil wind erosion. The research measured the influence of different underlying surface and configuration pattern of shrubs on wind velocity, rate of sand transporting and ground roughness length in Yanehi town sandy areas. The result shows ： The capacity of control soil wind erosion of shrubs is direct connection with deserts barrier species, height and configuration pattern, belt scheme plantation can improve windbreak effects. Salix psammophils with three rows one belt, average height 1.5m, row spacing 1.5m, inserting depth 0. 5m configuration pattern has the best control effect on soil wind erosion, but the effect is with in the distance of 15 times height of shrub. When rows of sand barriers are fixed, the lower height of sand barriers, the sand fixation ability is more obvious.

关 键 词：灌木林 配置格局 土壤风蚀 输沙率 

分 类 号：S157.2[农业科学—土壤学]