干旱期间森林土壤的水源涵养作用  

Water conservation of forest soil during the seasonal drought

作　　者：罗扬 吴鹏 丁访军 潘明亮[2] 潘忠松[2] 

机构地区：[1]贵州省林业科学研究院,贵阳550005 [2]贵州大学

出　　处：《林业科技开发》2010年第5期38-41,共4页China Forestry Science and Technology

基　　金：贵州省公益林可持续经营技术研究创新能力建设(编号:黔科合院所创能[2009]4002)

摘　　要：针对西南旱情比较严重的贵州省册亨县,选取了5种不同土地利用类型,对它们的土壤物理特性及其水源涵养功能进行了研究。结果表明:不同土地利用类型的土壤容重均随土层深度的增加而增加,土壤总孔隙度与毛管孔隙度都是随土层深度的增加而减小。有林地(落叶阔叶林地、灌木林地和杉木林地)的土壤物理性状要好于荒山和耕地。有林地在土壤持蓄水能力和蓄渗水能力这两方面均要远远好于荒山和耕地。森林的水源涵养功能要远高于耕地和荒山,具体排序为落叶阔叶林地(726.67 t/hm2)>杉木林地(706.80 t/hm2)>灌木林地(704.03t/hm2)>耕地(553.17 t/hm2)>荒山(444.25 t/hm2)。Five different land use types were selected to study their soil physical characteristics and water conservation functions in Ceheng County,Guizhou Province,in which the drought was serious.The results showed that with the increase of soil depth,the soil bulk density was increased in each of five land uses,while the soil total porosity and capillary porosity was decreased.The soil physical properties in the forest lands（mixed deciduous broadleaved forest land,shrubs and Cunninghamia lanceolata forests land） were better than those in the barren hills and farmland.The soil water holding capacity and water infiltration capacity in forest lands were much greater than those in the barren hills and farmlands.The water conservation function in five land use types was in the order of deciduous broad-leaved forest（726.67 t/hm2）Cunninghamia lanceolata forests land（706.80 t/hm2）shrubs（704.03 t/hm2）farmland（553.17 t/hm2）barren hills（444.25 t/hm2）.

关 键 词：森林土壤 水源涵养 干旱 

分 类 号：S714.2[农业科学—林学]