Research On The Selection And Application Of Evergreen Landscapeplant In Tianjin City

In North China, the public would feel like boring and longly when they saw that most of the trees in the picture of bare and brown trunk and branchs as they entered the dormant period due to the low temperature and short sunshine in winter. So it was very important to chose and plant the evergreen landscape plants for riching the landscape. Tianjin, as an important port city and the economic zone in Bohai Area, should be made more efforts to improve the urban enviroment and pay more attention to build nice landscape in the whole year.To rich the winter landscape plants in Tianjin, some scholars have researched the choice of plant species and frequency of evergreen garden planting and so on. However, it was short of the systematic studies on the evergreen garden plant selection, application, landscape evaluation, growth, maintanence and management. In this paper, it was studied on the choice of evergreen plant, application and landscape evaluation based on the existing researches in order to make vivily landscape in winter. The results showed as follows.1. There were 59 species of evergreen landscape plants in Tianjin area though field survey and account investigation, including of 10 common cultivars species, 11 less common cultivated species and 38 rare cultivars species. And it was estimated that there were more than 70 species of evergreen plants combined with the results of further studied.2. For the rational design of garden plants, the study show that the ratio of evergreen trees to deciduous trees was 1:2.4, the ratio of evergreen shrubs to deciduous shrub was 1:3, and the ratio of trees to shrubs was not less than 1:3.3. For the evaluation on the evergreen plants landscape in wintetr and summer by the SBE method, the study show that the main factors affecting the summer landscape were the number of plant colors, the contrast in colors, the shapes of evergreen tree, the ratio of evergreen to deciduous plants and the shape of main tree etc..And the main factor affected the winter landscape were the ratio of evergreen to deciduous plant, the artificial facilities, the shape of evergreen tree and the growth conditions. Based on the ensure of plant growth heathly, the landscape with the evergreen plants could be nice enough to attract the public by increasing plants color species, highlighting landscape color contrasts, enriching tree sharp features, reducing the ratio of evergreen to deciduous plants , and decorating the artificial facilities such as landscape stones, roads and so on.4. Plant species such as Euonymus japonicus, Buxus sinica, Sabina chinensis, Euonymus japonicas var. littleleaf could be cut in ball, fence or mold patterns to making up for short of the evergreen plant species and rich the scenes in urban green space.5. It should pay much attention to the daily maintanence of evergreen landscape plants, included the scientific arrangement of watering, pruning, preventing from cold and so on, which ensured the evergreen plants in good conditions to purify the air and beautify the scene.