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With the accelerating process of urbanization in China, the city's ecological environment deteriorating, in order to improve the city's ecological environment, there is a growing emphasis on the amount of green space green. In this paper, plant communities for the study, analysis of the relationship of the measurement factors in green biomass, expert scoring and data collection to determine landscape evaluation index system, and typical plant communities in landscape evaluation. The application CITYgreen model ecological benefit evaluation of the typical park, to establish the relationship between the Green and Ecological benefits. Provide a theoretical basis for future urban green space green biomass of plant communities study, and to provide a scientific basis for the Shanghai Urban Plant Communities configuration. The results are as follows: (1) a more accurate description of the green biomass and green biomass index concept, crown surface area in the range of index system of green biomass, crown surface area more vividly green money manifestation in the human field of vision, for further plant The basis for the study of green biomass. (2) to study the relationship between the amount of measurement factors in Green green space of four different types of plant communities found green parks with attached green, green small artificial pruning reasons. Protective greenbelts functional requirements due to its isolation, protection, greater density, so the green than the larger. In all investigations of plant communities, stratified broadleaf community accounted for the largest proportion of single-layer coniferous communities minimum proportion. (3) the impact of green biomass interaction factor analysis, found that the presence of the following characteristics: the impact of human factors on the amount of community green small diameter at breast height and tree height, the human impact is obvious, strong control on the amount of community green. Age gradually increases with the species, certain species of high growth to increase tree height increasing contribution to the community green biomass. In the case of the same canopy density, crown diameter and density relationship also exists obvious rule, when the density is small, the crown diameter larger, and relatively large fluctuations, with increasing density, among plants, light, heat, water competition getting stronger, stronger neighborhood effect interference, crown diameter is relatively small, and the fluctuations are also getting smaller and smaller. (4) in a common garden plant green biomass, green biomass gradually increased with the increase in diameter at breast height of tree height with increasing tree height, privet green biomass increased considerably, indicating privet grow faster . Ginkgo reduce green biomass increased with the increase in tree, Ginkgo off late in the growth of leaves, gradually decreases Green grow older. (5) in the study of green biomass and Landscape effective, is not greater green biomass, the greater the landscape effect, the two are not proportional to the landscape effect and plants with color, health, structural changes, and other factors closely related. And the author proposes a new landscape evaluation indicators and evaluation methods, fuzzy analytic hierarchy process more accurate reaction plant community landscape. (6) in the research community Green and Ecological benefits relationship with citygreen model assessment of ecological benefits, come to the Green and Ecological benefits were positively correlated. Total green amount of Yangpu Park 1.09 × 106m3, 833t of carbon storage, carbon sequestration, 19t, remove atmospheric pollutants 1086.37kg, reduce stormwater runoff 2040.81m3. Gongqing Forest Park green biomass 1.13 × 107m3, carbon storage 7077t, carbon absorption 159t, remove atmospheric pollutants 9237.11kg, reduce stormwater runoff 14090.69m3.
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