| With the rapid development of China’s economy and accelerating urbanization, industrialization, natural resources and ecological environment is facing unprecedented pressure, a serious deterioration in the quality of the urban environment. Composed of reinforced concrete and the city, which is extremely fragile ecosystem. Air and water pollution and lack of green space in the urban environment has become a prominent issue. Urban forest to improve the quality of urban ecological environment has a significant effect. In recent years, many ecologists that "the forest into the city, so the city is located in the forest," city parks, roads, trees, residential areas is an important part of the urban forest, for solving the problems of modern urban ecological environment of great significanceIn this paper, as a backdrop, the domestic tree species in a variety of basic theories and methods and a thorough understanding of the profound grasp of the foundation, to the main city of Putian City Licheng Road within the academy road, the warring Road, Liyuan Road,31main roads Life Extension Road, East Road, literature Road, Yingbin Road, Fuzhou-Xiamen Road and other East rocky Park, Phoenix Mountains Park, Jade Lake Park Life Extension Park, Repulse Bay Park, lychee Park, Nanhu Park, ribbon Creek Park8park, Golden Mile, Washington, Liyuan district, Zhengding soho, Europe’s leaders, Hung Yen city, Xishan district, lush healthy city, three letters home eight residential area of tree species for the object. For roads, parks, green residential area species composition analysis and research structure, vertical structure of tree species, horizontal structure, diversity data, and on this basis, the main city of Putian City, roads, parks, residential area of tree species optimize the structure and make recommendations for improvement. By studying the Lord has made the following key findings:1, City of Putian, road greening tree species,52genera,33families totaling64species of trees which accounted for14families and28genera,37species representing22families and25shrubs of27species. Number of Branch trees and shrubs, is a number of species than were0.63:1,1.12:1,1.37:1. Putian road green trees evergreen trees in the number of quantity exceeds deciduous trees, the ratio of2.71:1, and all kinds of roads evergreen tree species in73%of the total number of trees, and deciduous species only27%of the total number of trees. The vertical structure of tree species, trees, shrubs story combines three-dimensional structure has23types of streets, roads accounted for62.1% of the survey, there are14single trees, accounting for37.8%. Putian City, the vertical structure of tree species twelve more, and three hundred forty-five rarely, a strong sense of hierarchy of vertical space, spatial variation is more abundant. Putian SDI tree species diversity index reached0.858more evenness index was0.622, the results showed that the overall good, rich species, biodiversity is better, but specific to a single road, their diversity exhibited severe imbalance, which Liyuan Road tree species diversity performance best, SDI value0.862, while Phoenix Road, District Rd, Old Town Road, East Road, the road four tree species diversity in the worst performance, only one species, relatively simple, SDI is0. Life Extension Road, evenness index up to0.647, while the Phoenix Road, District Rd, Old Town Road, East Road, the road four tree species evenness index the minimum is0.2, City of Putian Park Green tree species,79genera and46families totaling108kinds, including29families,58genera of trees accounted for72kinds of shrubs representing21families,31genera and36species of trees and shrubs than the number of families, genera, species ratios were1.38:1,1.87:1,2:1. Putian road green trees evergreen trees in the number of quantity exceeds deciduous trees, the ratio of1.76:1, and all kinds of roads evergreen tree species in the total number of trees of63.81%, while the deciduous species only36.19%of the total number of trees. Putian City Park tree species than native species and exotic species is2.67:1, city park tree species native species accounted for68.09%the proportion of exotic species accounted for31.01%. Structure in the form of tree species in the park are Joe, three-dimensional structure of a combination of the type of irrigation floor. Park one, two green tree species are more high-end number of trees, five at least. Park Overall, SDI has reached more than0.97113,0.92728evenness index, the results show overall good species rich biodiversity better. Better overall tree species diversity, but the diversity of different parks which exhibit severe imbalance, where the diversity of tree species in the park litchi worst performance, SDI value of0.765, while the turkey the best Creek Park tree species diversity, its SDI value of0.958. Evenness index was0.897maximum life extension parks, and evenness index minimum of0.703Lychee Park3, City of Putian, eight residential community greening tree species,57genera and39families a total of70species, which accounted for23families,29genera of trees,36species of shrubs representing26families,33genera and34species of trees and shrubs than the number of families, genera, species than0.88:1,0.84:1,1.05:1respectively. Putian City residential area in evergreen tree species quantity exceeds the number of species of deciduous trees in the ratio of6.14:1, green residential area surveyed86%of the total number of plant species in the evergreen trees, and deciduous trees of the total number of trees only14%. Putian City residential area tree species than native species and exotic species is1.14:1, exotic species more abundant species, but not much. The proportion of native species living quarters tree species accounted for53.2%,46.8%exotic species. Joe, filling the second floor of the three-dimensional structure of a combination of the type of street has seven, accounting for87.5%of the road survey, there are a single tree accounting for12.5%. Putian residential area two tree species, three tree species tree more high-end number of trees, two of821, two of406, of which at least five of the18. So it ’s a strong sense of hierarchy of vertical space, abundant space changes. Residential area of tree species diversity index calculations, SDI has reached0.912more evenness index was0.752, the results showed that the overall good, rich species, biodiversity is better, but the diversity of different cell which exhibits severe imbalance, which Liyuan residential road performance of most tree species diversity good, SDI value0.823, while the diversity of tree species in Xishan district worst performance, relatively simple, SDI is small. Europe’s leaders evenness index up to0.665, while the Xishan district smallest tree species evenness index was0.172.4, according to the structural analysis of tree species in Putian City, respective for roads, parks, residential areas of tree species composition of the cell structure, vertical structure, horizontal structure, diversity optimization. Putian street tree species in optimizing the structure of the process should be possible to raise the top edge of the trees such as mango tree, Ficus, Ficus, Ficus, Ficus willow trees in proportion. Meanwhile, also on the park, residential area of tree species proposed structure optimization program. |
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