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For the construction of ecological garden in Hefei, the correct treatment and use of ginkgo trees, improve the quality of Hefei city greening and green benefits. This paper studies Hefei different conditions ginkgo green photosynthetic physiological ecology and soil properties, garden pests and leaf leaves plant chemicals in relationships, and ginkgo trees species in the landscape value of performance. Research results are as follows: 1. Use in Hefei Li-6400 produced within greenbelts, parks, protection green land, attached green four kinds of green diurnal variation of photosynthesis under ginkgo and green under the same annual variation was measured. (A) comparison of these four types of Ginkgo in green net photosynthetic rate, transpiration rate and water use efficiency and other physiological and ecological indices. Four kinds of green diurnal variation of photosynthesis under ginkgo results showed that: parkland net photosynthetic rate under ginkgo mean maximum 4.265μmol CO2m-2 s-1; followed by a subsidiary of the green 2.6907μmol CO2m-2 s-1 and production of green 2.6507μmol CO2m - 2 s-1; protective green ginkgo net photosynthetic rate under the average minimum 1.9317μmol CO2m-2 s-1; various types of green water use efficiency under ginkgo size the size of its net photosynthetic rate of the same trend. Through the net photosynthetic rate and various physiological and ecological factors correlation analysis, parks and green space protection under the regression equations were y = 0.8642x22 (R2 = 0.9994) and y = 0.8011 x22 (R2 = 0.9970), where x2 of stomatal conductance. Description In both green stomatal conductance under the limiting factor for the photosynthesis, producing green and attached green is no clear limiting factor. Perspective derived from photosynthesis, ginkgo green growth conditions in the park for the best, followed by production of green parkland and subsidiaries under the protection green next worst. (2) under the same green ginkgo diurnal trends in different seasons the same, but the size and appearance of each factor at different times. In the initial stage of growth, the strongest net photosynthetic rate, later as time goes on, there is a gradual downward trend. Chlorophyll a and chlorophyll b accumulation and net photosynthetic rate and average value of the same seasonal trends are highest in spring, summer and autumn are similar and significantly lower than in spring. (2) The experiment ginkgo, rose, hibiscus and other 9 kinds of Hefei common garden plant pests investigation, statistics and analysis, and thus the ability of plant resistance to pests and leaf content of total flavonoids and polyphenols mathematical model. The results showed that: Ligustrum and ginkgo leaf pest damage suffered minimally, the other participants LEAF suffered varying degrees of damage pests. The statistical analysis was, tested polyphenol content of plant leaves and leaf resistance to pests and diseases, can form y? = 195.35-247.74x 79.69x2 binary regression relationship, that explain the higher polyphenol content in leaves, resistance to pests the stronger. 3 green through different physical properties of the soil under the ginkgo, nutrient and leaf nutrient element content analysis. The results showed that: the green ginkgo under relatively low soil nutrient content, nitrogen content of a serious lack of phosphorus content is higher near the city, the performance of urban poor soil nitrogen phosphorus-rich phenomenon. Fresh leaves with soil nutrient content changes in the nutrient content of different and leaf nutrient enrichment has a strong role. Parkland soil physical properties and nutrient elements in good condition, Ginkgo grow best; protective green ginkgo under relatively poor physical properties of the soil, leaf scorch growth performance varying degrees of atrophy, especially near the bottom of the old leaves branches. 4 By now widely used in Hefei city road ginkgo, privet, camphor trees and other six kinds of qualitative and quantitative analysis and evaluation, the results showed that: trees leaf area index value of its great influence on ecological landscape, Hefei trees leaf area index ranged between 1.4-5.0, generally not high. This six kinds of trees, the trees which meet the ecological landscape values in the order of magnolia gt; ginkgo gt; Sophora gt; camphor gt; privet gt; sycamore.
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