红壤地区降水对林地养分输入与土壤侵蚀的作用  

Effects of preciptation on nutrient inputs and erosion of forestland in red soil areas:

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,浙江杭州310021 [2]浙江省林业科学院,浙江杭州310023

出　　处：《浙江农业学报》2001年第1期19-23,共5页Acta Agriculturae Zhejiangensis

基　　金：国家"九五"红壤科技攻关专题! (96 0 0 40 30 5 )

摘　　要：定位观测研究表明 ,降雨是林地形成土壤肥力的重要因素 ,特别是通过林冠层的穿透水和树干的径流水 ,其养分含量平均要比林外雨高 80 %左右。但在不同的气候条件下和不同的森林类型里 ,降雨输入土壤的养分差异悬殊。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 observation study on forest soil indicated that the precipitation was an important way in aspect of nutrient inputs to forest soil,especially the rain volume fluxed by canopy through fall and along the stem flow,in which the mean nutrient contents was about 80% higher than that on uncovered land.Whereas,the inputs of nutrient from rainfall was quite different among different climatic conditions and forest types.The precipitation caused soil erosion on the barren slopes land,resulting in nutrient exhaustion.

关 键 词：降雨 林内雨 土壤肥力 侵蚀模数 林地 红壤 

分 类 号：S715.3[农业科学—林学] S714.7