Negative Air Ions Characteristics and Microclimate Effects of Forest Stands at Different Elevations in Tropical Wet Season
In order to study the changing pattern of negative air ion concentration at different stands in wet season and its influencing factors,4 types of forest at the same altitude as well as evergreen broad-leaved forest and Areca catechu forest at different altitudes are selected in Nandao Forest-based Health Base,and the data about negative air ion are monitored from July to September using negative air ion detector and aerograph and analyzed with one-way ANOVA,multiple comparisons and correlation analysis.The results show that:1)The diurnal variations of negative air ion concentration in the types of forest stand present a bimodal pattern,and there are extremely significant differences among different stands.The mean values are ranked from high to low as rubber plantation>evergreen broad-leaved forest>A.catechu forest>Homalium hainanense forest.The more complex the community structure and the higher the canopy density,the smaller the negative air ion variability;2)Affected by the physiological characteristics and community structure of plants,the concentrations of negative air ions in different stands have different linear correlations with microclimate;and 3)The negative air ion concentrations in the evergreen broad-leaved forest and A.catechu forest are significantly negatively correlated with the altitude,and the variation coefficient of negative air ion concentration in A.catechu forest is positively correlated with the altitude.It can be seen that among the 4 types of forest stands,the rubber forest has the best effect in forest-based health and wellness,followed by the evergreen broad-leaved forest.Therefore,the two types of forests can be preferred for recreation activities to achieve forest-based health.
forest therapynegative air ionmicroclimateplant communityvegetation type
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万方数据
