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The Evaluation Study of Aero-anion of Palm Plant Communities in Xiamen

Author: LiYongLi
Tutor: PanHui
School: Fujian Agriculture and Forestry University
Course: Forest Management
Keywords: Aeroanion Palm plant communities Concentration Air Quality Evaluate
CLC: X831
Type: Master's thesis
Year: 2008
Downloads: 46
Quote: 3
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Abstract

The air anion known as \Operating factors, negative air ion concentration as an important forest tourism resources and urban forest health has become an important indicator of evaluation Clean and environmental advantages and disadvantages of urban air. In this study, to Xiamen palm plant communities from July 2007 to March 2008 as the research object, positive and negative ions concentration observations by air within the study area, the use of observational data list, mapping and analysis of variance, correlation analysis and other multivariate statistical methods qualitative and quantitative analysis of the annual variation of the air negative ions, diurnal variation, with arbor, shrub and grass structures and different structural configuration of plant community of air anion concentration, and still and meteorological factors (air temperature, relative air humidity, wind) of aeroanion to, the following negative air ion concentration variation and conclusions: (1) Variation in the negative air ion concentration in the palm plant communities, studies have shown that: negative air ion concentration from July to March first decreased and then increased in the process; highest value of negative air ion concentration in July, reaching 1046lons · cm ^{-3 , the lowest value in December, the highest value is 2.3 times the minimum value; air concentration of negative ions highest in summer and autumn than in spring, winter minimum; unipolar coefficient (q) and the air quality evaluation index (CI) annual curve showing a symmetrical relationship q The smaller the value, the greater the CI value, the highest CI The value appears in September, the best air quality. (2) different seasons air anion concentration diurnal variation there are some differences, but in general there will be peaks alternating Valley, with volatility; 2 to 3 negative air ion concentration peak, at 8:00 in the morning to 10:00, 18:00 to 20:00 and from 2:00 am to 4:00 pm, winter crest may occur at 12:00 noon, the highest peak value usually appears at 2:00 in the morning; 1 trough ~ 2, occurred mainly in 14:00 and 22:00, the trough minimum value usually appears in the 14:00 pm; variation of the negative air ion concentration increases in 22:00. (3) with Joe grass structure of plant communities in the air negative ions concentration reached 5% of the significant differences in further analysis, get spring just reached significant difference in summer no significant differences, significant differences in the autumn, winter no significant difference statistically significant from the Four Seasons The difference can be seen that the autumn air concentration of negative ions on the significant difference between the largest contribution. (4) arbor, shrub and grass type, Joe grass, bushes and trees and control to four different type of configuration palm plant communities within the negative air ion concentration reaches a significant level of 1%; Joe grass and bushes and trees that community between the two groups does not reach a significant level; air negative ions concentration in the the city palm plant communities of each type of configuration and air cleanliness level in order of: arbor, shrub and grass type community> Joe grass community> bushes and trees that community control (the bare land) Description arbor, shrub and grass plant community the best air quality. (5) the palm plant communities within the air ion concentration and air cleanliness levels were higher than the edge of the community, negative air ion concentration is nearly 2 times the edge of the community, the air cleanliness level is higher than the edge of the community, grades 1-2. (6) from the hydrostatic 5m at negative air ion concentration and the cleanliness of the air spring, summer, autumn and winter seasons, in varying degrees are greater than from the hydrostatic 1m, may be this distance not only by the diffusion of the the air anion formed by the water 5m, but also by the proliferation of negative air ions formed within 5m outside plant communities. (7) negative air ion concentration and air temperature, wind speed there is no significant relationship; air anion concentration and relative humidity of air there was a significant positive correlation between the relative humidity within the effective range increases with the increase of relative humidity.}

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