Application And Programming Of Ecological Landscape Greening Trees In Sheyang County

As an important life support system for urban ecological system, green land find its enormous role in green space protection and reappearance, urban ecological balance maintenance and urban ecological environment improvement. It is therefore a strategic direction for a modernizing city and a necessary tendency for a beneficially cycle city to enhance ecological function of urban green land and to establish an integrated urban green land of ecological landscape. Selection and arrangement of landscape trees is fundamental for the establishment of urban green land system. The aim of the research is to select the right trees to enrich urban landscape with local characteristics and to preserve biodiversity according to scientific principle of landscape trees layout based on investigation by taking advantage of theories of urban ecology, landscape ecology, ecological landscape, landscape aesthetics and city planning, and ultimately, to create a clean, comfortable, beautiful and civilized social surroundings and to lead to a balanced development of ecological benefit, social one and economic one. A sound and orderly development of green land cannot be guaranteed without the guidance of trees variety planning. Nursery production should focus on intended tress in blueprint so as to supplying complete, well-arranged and quality seedlings for a green Sheyang.We investigated overwinter arbor, frutex, liane and bamboo in the county and especially in the red-crowned crane conserving zone, forest park and shelter belt. The result is as follows:There are 331 kinds of trees, including 203 arbor(13 bamboo included), 110 frutex(2 bamboo included), 18 liane. The trees can be sorted into 122 evergreen ones and 209 hardwood. 123 local trees was found, accounting for 69% of all trees, including 94 arbor(28 evergreen and 66 hardwood, 5 bamboo included), 25 frutex(7 evergreen and 18 hardwood, 1 bamboo included) , 4 liane and 6 endogen grass. Most arbor and frutex enjoy a vigorous growth. Local trees can be sorted into 35 evergreen ones(28%) and 84 hardwood(68%). Of all landscape trees, 53 trees were familiar to us, including 25 arbor, 28 frutex and 2 liane, in another classification, 26 evergreen ones and 27 hardwood.Based on investigation, we analyzed environmental conditions for landscape plants and evaluated plant growth, trees aggregate and layout proportion of various trees.aArbor: frutex ratio in Sheyang was 1:0.54, and the ratio in local trees was 1:0.26, and 1:1.1 in familiar trees. Arbor was shown fewer in familiar trees, thus selection was narrow in arbor application. More arbor was called for to adjust the ratio and to enrich plant in Sheyang, consequently, to improve landscape green land and make urban sight more colorful.The proportion of evergreen to hardwood was 1:1.56, and the proportion was 1:2.6 in local trees, and 1:1.03 was found in familiar trees. Frutex and evergreen were relatively abundant compared with arbor and hardwood. More attention should be paid to local trees in plant arrangement.The following principle ratios were established on the basis of above analysis and current situations in Sheyang with the help of corresponding theories: evergreen: hardwood=l:2, arbor: frutex=2:l, woody plants: herbage plants=l:l, fast-growing: medium-growing: slow-growing=2:2:l.The following landscape trees were recommended:In general, trees should be selected from local ones and those imported with outstanding performance.The development orientation for landscape tress was concluded as follows from the investigation and urban development blueprint:1. Great efforts should be made to develop local trees so that local characteristics be demonstrated.2. Bamboo should be paid more attention to in order to promote ecological sightseeing.3. Colored-leaf trees and Magoliaceae Species were demanded properly to perfect urban landscape.4. Mixed forest need spreading to increase heterogeneity and minimize damage by diseases and pests.5. Strengthening shelter belt undertaking to promote a sound development for a harmonized society.6. Green space should be constantly expanded, more efforts were required to the job of domestication and spread of trees and to the job of selection and conservation of genetic resources.