三峡库区坡耕地利用与水土保持种植制

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间作及农作物与木本植物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 蚀之目的。

UTILIZATION OF SLOPE CULTIVATED LAND AND THE FARMING SYSTEMS FOR ITS WATER AND SOIL CONSERVATION IN THREE GORGE RESERVOIR AREA

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.