【摘要】 延安地区 70 %以上的耕地为山坡旱地 ,我国每年进入黄河的泥沙约 81 %来源于坡耕地。严重的水土流失是坡耕地作物低产的主要原因。但由于坡耕地面积大 ,存在着巨大的粮食生产潜力 ,只要合理开发 ,就有可能为该地区社会经济的可持续发展提供最基本的粮食安全保障。在分析和总结国内外半干旱地区农业成功经验与关键措施的基础上提出了延安生态农业建设中粮食潜力开发的若干关键措施与新技术更多还原

【Abstract】 The sloping land in Yan’an region occupied more than 70% of arable land, every year about 81% of sandyments amount in the Yellow River comes from sloping land, severe water loss and soil erosion is major cause to the low production in that land. Because of sloping land in large area, great food productive potential subsists in this area, as long as the potential is exploited rationally to furnish food security and social economic sustainable development is possible. Successful experiences and major management measures of dryland agriculture in China and oversea has been summarized, considering the true situation in the region,some key measurements and new techniques to exploit grain productive potential in the eco agricultural constructions of Yan’an have been suggested here.更多还原