【摘要】 随着城镇化快速推进,我国山地区域粮食生产与社会经济发展的矛盾日益突出,将部分城镇、工业项目向适宜建设开发的低丘缓坡区域拓展,成为我国山地省份和地区城镇化、工业化过程中不得已的选择。如何权衡耕地保护及粮食安全与低丘缓坡建设开发出现的生态安全问题,是低丘缓坡开发建设必须系统研究的重要问题。以云南省重点城镇化区域暨低丘缓坡开发试点重点地区——大理市为例,对此问题做初步探索。结果表明:(1)城镇化及城镇扩张无论建设占坝子优质耕地还是占低丘缓坡山地的林地,都将导致土地利用综合效应下降。必须在城镇化占用这两类农用地的土地利用综合效应进行权衡,两害从轻。(2)相比较而言,城市(镇)建设占用耕地尤其是坝子优质耕地对山地区域来说,比开发低丘缓坡山地占用林地,其土地利用综合效应损失要大很多。(3)通过加强低丘缓坡山地开发的生态修复和绿化以及在坝子耕地上发展有机农业和生态农业以增强坝子耕地的生态服务功能,可以一定程度上弥补低丘缓坡山地开发导致的区域生态损失。更多还原

【Abstract】 With the rapid progress of urbanization, the contradiction between grain production and social and economic development in mountainous regions in China has become increasingly prominent, and some towns and industrial projects have been expanded to low hills and gentle slopes suitable for construction and development, becoming the process of urbanization and industrialization in mountainous provinces and regions in China. The last resort. How to balance the protection of cultivated land and food security with the ecological security issues arising from the construction and development of low hills and gentle slopes is an important issue that must be systematically studied in the development and construction of low hills and gentle slopes. This article takes Dali City, a key urbanization area in Yunnan Province and a pilot area for the development of low hills and gentle slopes as an example, to make a preliminary exploration of this issue. The results showed that:(1) Urbanization and urban expansion will result in a decline in the comprehensive effect of land use regardless of the construction of high-quality cultivated land in dams or forest land occupying low hills and gentle slopes. We must weigh the comprehensive effect of land use on the two types of agricultural land occupied by urbanization, and the two harms are taken lightly.(2) In comparison, the cultivated land occupied by urban(town) construction, especially high-quality cultivated land in dams, is much larger for mountainous areas than the development of low hills and gentle slopes.(3) By strengthening the ecological restoration and greening of the development of low hills and gentle slopes and the development of organic agriculture and ecological agriculture on the arable land of the dam to enhance the ecological service function of the arable land of the dam, it can compensate for the regional ecological losses caused by the development of the gentle hills.更多还原