为提高城市隔离片林生态效益及景观面貌，片林结构除简单的乔木层外，还应具有一定面积的复层混交种植结构。
Besides the simple arbor layer, the multilayer plantation structure should be adopted in order to enhance the ecological benefits and scene values of isolating greenbelts in Beijing.
本次评价建立的新农村绿地植物景观评价模型，包括美学效益、生态效益和社会效益3个准则层、12个评价因子。
This evaluation established new rural green space plant landscape evaluation model, including aesthetic, eco-efficiency, social benefit as criteria layers and 12 evaluation factors.
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