Comprehensive Evaluation Research On The Main Color-trees In Rizhao

With the rapid development of Urbanization,plants as soft landscape materials in the building, in the plant landscape, plays an increasingly important role in the construction of ecological environment.Previous studies on plant landscape evaluation have yielded fruitful results.But in the light of colorful plants landscape evaluation, there is no specific reports in China.The landscape designer has no theory in the application of color trees, no data is available.In this sense, evaluation of the effect of plant landscape color imminent,This is very important for optimizing the design scheme of landscape plants, and improving the ecological and ornamental value of landscape.Under the guidance of the "people-oriented", with the application of colored leaf trees and landscape and ornamental demand as the starting point,taking into account both the garden plant of the actual landscape function, also from the perspective of the viewer’s analysis of the landscape of emotional experience.Choosing Rizhao City as the research area,Field survey and laboratory test were carried out on 13 common tree species used in Rizhao City including species, structure characteristics,ornamental characters, green biomass, phenology, growth status, solid carbon release oxygen capacity, cooling capacity, and reducing noise.On the basis of colored leaf trees in Rizhao city ecology were quantified, and the establishment of colored leaf trees landscape evaluation system by using AHP(analytic hierarchy process).And the problems existing in the actual configuration put forward reasonable suggestions, hope to provide guidance for future application of Rizhao City of colored leaf trees, for the landscape change and the scientific and reasonable construction to provide certain theoretical basis.To provide some theoretical reference for the improvement of landscape architecture and scientific and reasonable construction.The main results are as follows( 1) The measured leaf area of 13 kinds of colored leaf trees is as follows:Acer platanoictes>Acer rubrum>Prunus virginiana>Prunus cerasifera>Acer palmatum Atropurpureum>Cotinus obovatus>Cotinus coggygria>Triadica sebifera>Acer pictum Thunb>Acer buergerianum >Acer palmatum Thunb>Prunus blireana cv. Meiren>Prunus ×cistena,The leaf area is proportional to the size of the leaf area index, and its size is influenced by the diameter of the tree crown diameter and the richness of the canopy structure.( 2) 13 kinds of colored leaf trees in the green quantity of the sort order Acer buergerianum >Acer palmatum Thunb>Acer pictum Thunb>Acer rubrum>Triadica sebifera>Cotinus coggygria>Prunus cerasifera>Acer palmatum Atropurpureum>Prunus blireana cv.Meiren >Prunus virginiana>Cotinus obovatus>Prunus × cistena>Acer platanoictes,Green quantity was affected by total leaf area, leaf area index, canopy volume and leaf volume index.(3)The result showed 13 kinds of species with different noise reduction effect.The ability of relative A level noise reduction was in the range of 0.25dB/m~1.17dB/m.The noise reduction rate was between 8.61%~29.26%.The noise reduction effect of Cotinus coggygria was the best,the worst was Acer platanoictes.The relative noise reduction and crown characteristics of trees had significantly positive correlation.The relative reduction of noise was affected by the thickness of leaf and the height of branch.(4)The size of the increase in the amount of moisture on the land area of the plant unit Acer buergerianum>Acer rubrum>Triadica sebifera>Prunus cerasifera>Acer palmatum Thunb>Cotinus obovatus>Cotinus coggygria>Acer platanoictes>Prunus virginiana>Acer pictum Thunb>Prunus blireana cv. Meiren >Prunus × cistena>Acer palmatum Atropurpureum。The amount of cooling in the unit land area is in turn Prunus cerasifera>Acer rubrum>Acer buergerianum>Triadica sebifera>Acer palmatum Atropurpureum>Prunus virginiana>Acer platanoictes>Cotinus coggygria>Acer rubrum>Acer pictum Thunb>Prunus blireana cv. Meiren>Acer palmatum Thunb>Prunus × cistena,cooling range is 1.65℃to 12.24℃。Leaf area index can reflect the per unit of land plant fixing carbon and releasing oxygen capacity size, solid carbon larger with Acer buergerianum、Acer rubrum, the minimum is Prunus × cistena。The capacity of carbon fixation and oxygen release in plants is related to the size of plants.The net photosynthesis rate of Prunus × cistena is larger, but less carbon per unit land area.Fixing carbon and releasing oxygen capacity on leaf color of colored leaf trees to be higher than ever colored leaf color leaf trees, per unit leaf area of fixing carbon and releasing oxygen ability of tree species, per unit land area of fixing carbon and releasing oxygen ability is not necessarily strong, this and average crown, leaf density on unit land area larger, leaf area larger, release oxygen ability stronger.The carbon fixation and oxygen release per unit leaf area, leaf color than the color leaf tree species of color leaf trees.(5)Comprehensive carbon fixation and oxygen release, cooling and humidification of the ecological and economic benefits of value and unit of land area growth during the period of the economic value of size followed by Acer buergerianum,Acer rubrum,Triadica sebifera,Prunus cerasifera,Cotinus obovatus,Cotinus coggygria,Acer palmatum Thunb,Prunus virginiana,Acer pictum Thunb,Acer platanoictes,Prunus blireana cv. Meiren,,Acer palmatum Atropurpureum,Prunus ×cistena.There were differences in the magnitude of the economic benefit of each tree species, among which the color changing leaf was superior to the common one.(6)People’s attention to the ability of the plant to release oxygen, temperature andhumidity increasing, the ability of reducing noise and noise reduction is higher, people pay more attention to the ecological benefits of plants.13 kinds of tree species in comprehensive evaluation, A level has two species, Acer buergerianum and Acer rubrum respectively.B level has4 species, Prunus cerasifera,Triadica sebifera,Cotinus obovatus and Acer platanoictes respectively.C level has 5 species, Prunus blireana cv. Meiren,Acer palmatum Thunb,Cotinus coggygria,Prunus ×cistena and Prunus virginiana respectively.D level has two species, Acer palmatum Atropurpureum and Acer pictum Thunb respectively.13 kinds of color leafed varieties in ornamental value,ecological value, economic value and has advantages, can have the choice of rational development and utilization of, secondary species remains to be further study and explore.