生态科学2018，Vol.37Issue(6)：191-198,8.DOI:10.14108/j.cnki.1008-8873.2018.06.025
九龙山林缘地区空气负离子浓度变化特征及与气象因素关系
Characteristics of air anion change and its relationship with meteorological factors in forest margin area of Jiulong Mountain
摘要
Abstract
In this paper, the characteristics of changes in negative air ion concentration were investigated at forest edge of Jiulong mountain.We monitored the diurnal dynamic of negative air ion concentration and its variations along with the altitudinal gradient at forest edge and in the forest interior in September and October, 2017.Meantime, the mean, maximum, and minimum values of air temperature, air humidity, wind speed, saturated vapor pressure, net radiation, and effective radiation of photosynthesis were concurrently measured, and a path analysis was applied to quantitatively explore the relationships between meteorological factors and negative air ion concentration.The results showed that: (1) The average concentration of negative air ions in October was 80％higher than that in September.The diurnal variation of negative air ions concentration presented a trendency of decrease in September.The diurnal change showed a single peak curve in the early October, but it presented a curve of power function and had a downward trend in the mid and late October. (2) The concentration of negative air ions was 4％higher at forest edge than that in the forest interior.The concentration of negative air ions showed a wave shape along with the altitudinal gradient at forest edge;in contrast, it presented a clear single peak type along with the elevation gradient in the forest interior. (3) By using stepwise regression analysis, the minimum air humidity, saturated vapor pressure, and air temperature were extracted from all the meteorological factors to conduct the path analysis.The direct path coefficients of these three selected meteorological factors were 1.064, -0.817, and 0.468, respectively.Therefore, the lowest air humidity was the dominantly direct factor that affected the concentration of negative air ions.The minimum air temperature was the main indirect factor via influencing the minimum air humidity and saturated vapor pressure.We highlight the importance of forest edge area in forest health planning by contrasting the concentration of negative air ions at forest edge and in the forest interior.关键词
林缘/空气负离子/通径分析/相关性Key words
forest edge/negative air ions/path analysis/correlation and dependence分类
农业科技引用本文复制引用
余海,辛学兵,裴顺祥,吴迪,吴莎,法蕾,马淑敏,郭慧..九龙山林缘地区空气负离子浓度变化特征及与气象因素关系[J].生态科学,2018,37(6):191-198,8.基金项目
中国林科院基本科研业务费专项资金(CAFYBB2014MA017) （CAFYBB2014MA017）
