降雨对林地养分输入与土壤侵蚀的作用  

Effects of Precipitation on Nutrient Inputs and Erosion of Forest land

作　　者：水建国[1] 柴锡周[2] 卢庭高[2] 

机构地区：[1]浙江省农业科学院土壤肥料研究所,杭州310021 [2]浙江省林业科学院,杭州310023

出　　处：《土壤与环境》1999年第4期258-261,共4页Soil and Environmental Sciences

基　　金：国家"九五"科技攻关项目!96-004-03-05

摘　　要：用定位观测研究表明，降雨是林地形成土壤肥力的重要机制；特别是通过林冠层的穿透水和树干的径流水，其养分通量平均要比林外雨高80％左右，但在不向的气候条件下和在不同的森林类型里，降雨输入土壤的养分存在着较大的差异，在无植被覆盖的坡地上，降雨会造成土壤侵蚀，使土壤养分入不敷出。Results of a long-term experiment on fbrest soil indicated that the precipitation was an important way　of nutrient input to forest soil, especially, the mean nutrient fluxes of canopy throughfall and stemflow were about 1.8 times as much as that of rainwater on uncovered land. Whereas, the inputs of nutrients from rainfall were quite different among different climatic conditions and forest types. The precipitation caused soil erosion on the barren slope land, resulting in exhaustion of soil nutrients.

关 键 词：降雨 林内雨 林地 土壤肥力 土壤侵蚀模数 

分 类 号：S715[农业科学—林学] S714.7