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城市绿化是把被破坏的自然通过人工再创造的“第二自然”,也是一个与城市化进程同时产生的逆向过程,是城市人工生态系统中极为重要的组成部分.城市绿化具有美化、装饰等并将其生态效益化的功能,是城市可持续发展的要求.一、构建城乡一体化的生态绿网为缓解城市的大气污染和热岛效应,发挥城乡绿化的整体性和系统性的功能,大城市(尤其是特大城市)的绿化建设应以绿色廊道(简称“绿廊”)建设为主体.绿廊指的是从农村开始,经过城市的中心区穿越热岛再进入农村,沿途将“园”(块状绿地)、“楔”(楔形绿地)、“环”(环状绿带)、“廊”(绿
Urban afforestation is the “second nature” that recreates the destroyed nature through artificially rebuilding, and it is also an inverse process that is brought about simultaneously with the process of urbanization, which is an extremely important part of the urban artificial ecosystem. Urban afforestation has beautification, decoration, etc. And its ecological benefits of the function is the sustainable development of the city’s requirements.First, the construction of urban and rural ecological green network to ease the city’s air pollution and heat island effect, play the overall urban and rural green and systematic functions, large The greening of cities (especially megacities) should be based on the construction of green corridors (Green Corridor), which refer to the rural areas and the central area of the city through the heat island before entering the rural areas. “(Green blocks),” wedges “(green wedges),” rings “(green belts),” green "