Abstract:

Based on the summarization of the former aeronion assessment models, the article put forward the concept of aeroanion coefficient, established the assessment models of aeroanion coefficient(p) and forest aeroion(FCI). Besides, after analyzing the data of aeroanion concentration observed in 10 forestry recreational areas through the method of standard normal logarithm transformation, the article set up the standard grades of forest aeroion(SGFA) and evaluating index standard grades of forest aeroion(EISGFA). The values of SGFA(with the unit of entries·cm^-3), p and EISGFA were divided into six grades, respectively, >3 000,2 000～3 000,1 500～2 000,1 000～1 500, 400～1 000, <400; >0.8,0.7～0.8,0.6～0.7,0.5～0.6,0.4～0.5,<0.4 and >2.4,1.4～2.4,0.9～1.4,0.5～0.9,0.16～0.5,<0.16 respectively。According to the biological effect of aeroanion to the body of human being, this article divided the value spectrum of SGFA into three sections, respectively, critical section (<400), allowable section (400～1 000) and hygienical section (>1 000). With the using of the standards and the indexes, the aeroanion status of the main sightseeing areas of Zhangjiajie Forestry Park was successfully evaluated.

Key words: Forest recreational areas, Aeroanion, Evaluation