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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。
The Three Gorges reservoir area has very limited cultivated land resources, and the sloping cultivated land occupies a large proportion of steep slopes. Under unfavorable tillage, the fertility is low and soil erosion is very serious. Based on the analysis of the natural conditions and characteristics of sloping farmland resources in the Three Gorges Reservoir Area, the relationship between the cropping system and soil erosion was discussed. It is proposed that intercropping crops with perennial crops, Such as lily, feed forage) intercropping and intercropping of crops and woody plants (live fences) to establish the crop cultivation system of sloping cropland so as to reduce the soil erosion. It is considered that under the current social and economic conditions, the establishment of a conservation seed system is the most economical and effective way to reduce soil erosion on sloping farmland.