Research On Temperature And Humidity Of Urban Green Space Plant Communities In Summer

As the biological filter of the city, the comprehensive benefits of the urban green space is becoming increasingly evident, including improving urban structure and image, improving the quality of residents and so on. Recently,people pay more attention to the on urban green space and put emphasis on improving the green space construction biodiversity and ecosystem environment. The design of the green space demandes not only the external form aesthetic,but the internal and the overall structure should be comply touched with the ecology principle and biological characteristics of urban green space. The green space plays an important role in the city landscape structure and functionThe green space changes the surface radiation status and the near-by ground surface radiation, making the green space thermal properties change, producing the difference between the green space and the ground, forming microclimate circulation. Choosing the basic components of urban green plant community as the research object, every kind of plant communitys play different thermal effect and its ecology effect is different. Different plant community benefit humid, and reveals the eco-microclimatical effects from the difference, will help the city botanical garden space planning and management, and help to improve the urban ecological environment.Based on chongqing city of plant communities of the temperature and humidity of the test experiments, the candidate try to analyze the characteristics of the temperature and humidity of the plant community in the 2010 summer and 2011 summer. The paper through to chongqing city common plant community that the following conclusions:(1). Pure forests and mixed forests are different on the effect of temperature and humidity.lt is better that the mixed forests than the pure forests in the community characteristic similar conditions in contrast. (2). Canopy density plays an important role in the effect of temperature and humidity.The coefficient is respectively 0.88 and 0.81 which is the relation between the canopy density and the temperature and humidity.The greater the canopy density the lower the temperature will be, and the greater the humidity; The smaller the crown density of plant communities. Canopy density of plant communities to humidity The effect of the canopy densityis limited to the temperature and humidity.(3). Crown density is positive to the effect of temperature and humidity.correlation, but its influence coefficient is not significant, the temperature and humidity effect coefficient of 0.11 and 0.12, respectively.(4). The tree’s diameter at breast height is one of the factors which effect the temperature and humidity.It is not play a decisive role, its influence coefficient in 0.1 or so, which can not reach the standard of the significant influence.(5). The tree’s height under the branch is a foctor which the effect is limited. The lower of the height under the branch,the higher benefit of the plant communities. the less of the benefits of the rule. The correlation coefficient is small which is not the key factors to affect the temperature and humidity.(6).Illumination intensity is one of the key factors to the effect of plant communities temperature and humidity.The temperature inside the plant communities which has significant positive correlation, the greater the illumination intensity, the higher of the temperature. The temperature inside the community is small when the illumination intensity is low.The illumination intensity is significant negative correlation to the humidity(7). The temperature and humidity of the internal plant community is not evenly distributed, and as the underlying surface of plant communities in a horizontal direction, a plaque distribution within the community microclimate characters have differences, which can lead to internal plant community in a horizontal distribution of temperature and humidity has not regular distribution.(8). In vertical orientation,the distribution of the temperature and humidity is regularly.when the underlaying surface is the brick, away from the underlying surface more close, and the temperature community is higher, the smaller the humidity; From the underlying surface position more far, plant communities of internal temperature will be lower, and the greater the humidity. When the plant community underlaying surface for plants, plant community among the temperature inside the present high, low on both ends. Humidity performance as the middle low, the condition of high ends. The distribution of temperature and humidity depends on plant transpiration loss function, and photosynthesis of high and low.