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中文摘要：
从城市空间布局的观点分析，大城市边缘地区的社会经济发展用地布局是最为复杂的。过去与现代，大城市的边缘区域都是城市空间扩展的主要方向。特别是当代城市化迅速发展时期，城市边缘就是不断郊区城市化的过程。本文以长三角为例，探讨经济发达地区郊区城市化、郊区都市农业基地创建、重点小城镇发展策略以及高新技术园区建设等大城市边缘地区发展的关键性的、涉及到合理利用土地资源的根本问题，论文提出“精明增长”及其城市化蔓延带来的用地时空所引起的各项社会成本、环境成本日益增加的趋势。研究这些问题，为保护我国有限的土地资源提供科学决策。
英文摘要：
The land use and cover change （LUCC） of metropolitan fringe areas is one of the most important issues of International Geosphere-Biosphere Program （IGBP） and the UN global change study （Lambinetal, 1995）. In the past 10 years, China has always attached great importance to metropolitan fringe area named suburban urbanization of land use and farmland protection problems, Shanghai, Beijing, Shenzhen, Guangzhou, Nanjing, Hangzhou urban planning departments with scientific research units have done a lot of research, accumulated a lot of valuable experience. This paper takes the Yangtze River delta for an example, and discusses the suburban urbanization of developed economic regions, as well as creates urban agriculture base of suburbs, development strategies of key small towns and construction of high-tech parks and other key issues which involve the basic problems of the rational utilization of land resources. This paper proposes ＂smart growth＂ and various social costs, environmental cost increasing trend caused by urbanization spread from land space-time change. Finally, the authors put forward the reasonable development of rural and urban areas, and the reasonable utilization orientation of suburban land, to perfect the integration of urban and rural areas, and to balance urban and rural development. Considering the situation of China, the authors point out that the agricultural land and important areas in high-yield agriculture land should be protected, the land utilization should be use efficiently.
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