三峡库区坡耕地退耕与粮食安全的空间分异  

A Study of Spatial Disparity of Slope Farmland De-farming and Food Safety in Reservoir Area of the Three Gorges

作　　者：冯仁国[1] 王黎明[2] 杨燕风[2] 欧阳宏斌[3] 

机构地区：[1]中国科学院资源环境科学与技术局,北京100864 [2]中国科学院地理科学与资源研究所,北京100101 [3]国家基础地理信息中心,北京100044

出　　处：《山地学报》2001年第4期306-311,共6页Mountain Research

基　　金：中国科学院地理科学与资源研究所知识创新项目 (CXIOG -B0 0 -0 4);中国科学院知识创新项目 (KZCX2 -3 0 7-5 )资助

摘　　要：坡耕地退耕还林还草作为生态环境建设的一项重要措施 ,已在全国逐步开展。坡耕地退耕使耕地数量减少 ,并影响到退耕地区粮食产量减少 ,尤其在坡耕地分布集中、交通不便地区的尤为突出。本文利用GIS技术对三峡库区坡耕地的空间分布进行了分析 ,探讨了三峡库区坡耕地退耕后粮食安全隐患产生的原因 ,初步揭示了粮食供需矛盾的空间差异 ,并结合交通便利状况 ,划分了粮食安全区、警戒区。As an important measure of eco environmental construction, the process of de farming in slope farmland is being undertaken gradually in the whole country. Meanwhile, the problem of reducing in food yield in de farming areas can not be neglected any more. It is especially the case in areas with concentrated slope farmland and inconvenient transportation. In this paper, we analyze the causes of hidden troubles in food safety in reservoir area of the Three Gorges, and the spatial relationship between farmland and slope farmland in the reservoir area, unveil the spatial disparity of contradictions between food supply and demand. Finally, combining accessibility of areas, three different spatial types of food safety food safe area, food alert area, food crisis area are divided.

关 键 词：坡耕地 退耕 粮食安全 空间差异 三峡库区 生存环境建设 

分 类 号：S28[农业科学—农业水土工程] F301.24[农业科学—农业工程]