This paper researched the design of roof greening,explained that the roof greening was the effective method to use city roof space,pointed out its key design was how to reduce the roof load,plants plant select etc..In the design should follow the design principles.Point out the design elements used in land greening could also be used in roof greening,the roof greening design elements had no restrictions.%对屋顶绿化的设计进行了研究,说明屋顶绿化是利用城市屋面空间的有效方法,指出其设计关键在于如何减轻屋顶荷载,植物种植选择等,在设计时要遵循设计原则,提出地面绿化中可以使用的设计要素也可以用于屋顶绿化,屋顶绿化设计要素种类没有限制。
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