Application of "Green Quantity" Concept in Expressway Afforestation and Realizing Ways

The expressway afforestation is a critical part to improve the ecological environment in expressway area,and the development of its ecological benefits is determined by choice and configuration of plants.In China,the present expressway afforestation has a tendency of attaching importance to landscapes but despising ecological functions,so it is hard to develop the natural production capacity of green plants to most extent.Therefore,exploitation of new green indices to measure the ecological benefits of expressway afforestation and to evaluate the afforestation achievements of enterprises has positive meaning for guiding the expressway afforestation construction.This paper introduces the concept into the expressway afforestation construction and elaborates the meaning and calculating methods of the Green Quantity in detail,and then proposes the realizing ways.