摘要
三峡库区耕地资源十分有限，且坡耕地占有相当大的比重，陡坡地多，在不良的耕作方式下肥力低下，水土流失十分严重。在分析三峡库区自然条件与坡耕地资源特点的基础上，讨论了坡耕地种植制度与土壤侵蚀的关系，提出通过合理搭配作物种类进行多熟制间套作，一年生农作物与多年生经饲作物（如黄花菜、饲料牧草）间作及农作物与木本植物（活篱笆）等高间作等手段来建立坡耕地水土保持种植制，从而达到减轻土壤侵蚀之目的。认为在目前的社会经济条件下，建立保护性种制度是减轻坡耕地水土流失最为经济有效的途径。
In Three Gorge Reservoir Area,cultivated land resource is very limited,of which a rather high proportion is slope farmland ,including a large area of steep cultivated land.Due to poor cultivation and management,soil and water loss is very serious.Based on analyses of natural condition and the characteristics of slope cultivated land in Three Gorge Reservoir Area,the authors probed into the farming systems of slope cultivated land in relation to soil and water conservation,and came to the conclusion that soil erosion in slope cultivated land can be effectively alleviated by adopting such protective farming systems as rational multiple cropping plantation,intercropping of annual crops with perennial crops or xylophyta.It was also pointed out that,under current social and economic condition,establishing protective farming system is an economical way to control water and soil loss in slope cultivated land.
出处
《长江流域资源与环境》
CAS
CSCD
1998年第3期255-259,共5页
Resources and Environment in the Yangtze Basin
基金
中国科学院院长基金
关键词
三峡库区
坡耕地
水土保持
种植制度
耕地利用
Three Gorge Reservoir Area,slope cultivated land,water and soil conservation,farming system
