Study On Ecological Construction Greenbelt Of Residential Area Of Fuzhou City

This paper uses plant community statistical methods, combination the theory of landscape ecology, urban ecology, investigation of the current green space within the residential district of Fuzhou plant species composition, vegetation green structure, green landscape features, ecological benefits of green space, green space systems and other aspects of management, analysis of Fuzhou residential green ecological problems existing in the construction and green ecological benefit. The results show that:1. In terms of greenbelt plant composition, residential plots surveyed a total of 141 plant species, belonging to 68 family,124belong.Of which 55 species of trees, accounted for 39.1% of plant species. Trees in residential green plants is in a dominant position; 42 species of shrubs, accounting for 29.8% of green plants;5 species of liana, accounting for 3.54% of plant species green; 39 species of herbs (including aquatic plants 1), herbaceous species accounted for 27.6% of the total number of plant species, herbaceous perennial herb which accounted for 87.17% of total. But The Fuzhou city bureau of parks report on "Biodiversity Conservation Planning of Fuzhou City" show, there will be no less than 2500 kinds of plants in 2010 in Fuzhou region, it will be seen from this, Fuzhou residential rich green plant species is not enough.2. In the greenbelt Structure, the residential area have similar pattern of vertical greening, most are trees + small shrubs + green lawn constitute a vertical structure, some of the roads only have green tree, or trees + lawn; level structure by the majority of residential pruning flowers and foliage plants, such structure is conducive to enhancing the level of the structure of green space in the beautifully. However, the study found, Fuzhou residential space structure of the vertical virescence basic no metope, too geometric pruning, while the beautification of the landscape, but does not play a beneficial ecological benefits of green.3. Comparison of plant diversity in green areas, from trees, shrubs, herbs look at three types of diversity, comprehensive comparison of 10 residential quarters draw, Southern Water Jiezuo tree layer Shannon-Wiener index and Simpson index values was 3.6989 and 0.9114, both index values are the highest value of 10 quarters, Shimao bund tree layer 2 index was 0.8050 and 2.7061, two indices of 10 residential quarters in the lowest diversity index of tree; Oriental century shrub species diversity index of Simpson's index is 0.7286, Shannon-Wiener index was 2.3418, in 10 of the lowest values of the residential district; Herb diversity in the East City District herbs Shannon-Wiener index 2.1247, In 10 of the lowest values of the residential district. From the perspective of different region of plant diversity, comparison of five region, Taijiang green residential district the minimum tree and shrub diversity, Jinan residential district while the lowest diversity of herbaceous plants. So, greening the residential area in the arbor, shrub, herb use is not balanced, in regional position also have very big difference, comments of Jinan residential greening needs to be improved, Taijiang new residential greenbelt and lack of plant species, relatively simple, on the ecological benefits of green space to play a good little significance.4. Ecological functions in the green, tests show that the green residential area of Fuzhou negative air ion concentration between the219/cm3~ 2782/cm3, test peaks at 9:30~11:30, other time basically stable. Different location of air negative oxygen ion concentration, most test points less air negative oxygen ion concentration 700/cm3, description Fuzhou residential air negative oxygen ion concentration is not high, the air quality is unsatisfactory. Tests showed that after 40 meters away from the grass green 0.3 meters test points noise reduction 22.1(dB)A, 1.0 m height of 40 meters from the noise tests reduce the 20.2 (dB) A. Trees, shrubs and other three-dimensional composite green from 0.3 meters to 40 meters high noise reduction 23.7 (dB) A, 1.0 m height of 40 meters away from noise reduction 25.7 (dB) A. The resulting complex space Green function for noise reduction is more obvious, more conducive to eco-efficiency residential district play. however, green residential area of composite structure in Fuzhou is not perfect, so noise reduction effect and can not achieve better results.5. In the greenbelt management aspects, the residential district is basically a property management company in Fuzhou, Southern water jiezuo, Oriental century, Gushan court, Shimao bund, Waterfront junshan have a special green space conservation management, however, limitations in daily maintenance of the level of care on the green, construction of the conservation system is not science, to reach the level of specialization of green maintenance management, other green space conservation district is not full-time staff. Overall, green residential area of Fuzhou low level of effective management, green space conservation is not obvious.The results obtained by the above, after several years of development,residential green building in Fuzhou has been gradually moving to a reasonable and scientific direction, but there are still many needs to be improved. Need to further increase the landscape plants in Fuzhou, better play to the advantage of native plant species, at the same time introduced plant species, the formation of distinctive residential greenbelt landscape. According to different configuration of seasonal plants a more scientific, constructing compound of green space framework, different types of residential conditions, the maximum green ecological benefit, creating characteristic of establishing and perfecting the greenbelt landscape management and maintenance system. Through this study tries to Fuzhou residential space, provide feasible suggestions of ecological construction, to promote the urban green ecological construction of further development, the construction of urban residential space system becomes ecological and harmonious, scientific urban green ecological system.