【摘要】 通过对九峰国家森林公园几种主要森林类型中环境因素进行实地测定，构建夏季森林环境效应综合评价体系，为森林康养产业发展提供科学参考。选择园内5处有代表性的森林类型及对照点（CK）,监测空气温湿度、大气颗粒物浓度及空气负离子浓度等多项因子，研究各因子日变化规律，分析比较不同森林类型之间的差异，采用主成分分析法对不同森林类型进行环境效应综合评价。结果表明：（1）各森林类型空气温度呈单峰型变化，湿度呈单谷型变化，比对照点平均降温2.63℃、增湿10.38%;人体舒适度呈早晚更舒适的日变化特征。（2）各森林类型大气颗粒物浓度均呈逐渐降低日变化特征，TSP、PM_1.0、PM_2.5和PM₁₀日均净化率分别达64.13%、35.26%、44.49%和56.75%。（3）各森林类型空气负离子浓度日变化基本呈现双峰型，日均值为899.21个·cm^-3,为对照点的2.65倍。（4）空气负离子浓度与湿度、PM_2.5浓度、PM₁₀浓度、DIFN均呈负相关，与LAI呈正相关；PM_2.5浓度与PM₁₀浓度、湿度、DIFN呈正相关，与温度、LAI呈负相关。九峰国家森林公园典型森林类型夏季环境效应综合评价结果由高到低排序为：针叶和常绿阔叶混交林>常绿阔叶林>落叶阔叶林>针叶和落叶阔叶混交林>常绿落叶阔叶混交林；其中，综合环境效应最高的森林类型是以苦槠和湿地松为主的针叶和常绿阔叶混交林。对于不同森林类型来说，由于森林类型的树种组成、密度、年龄结构及树木个体在林地分布不同，森林对环境产生的效应就出现差异。更多还原

【Abstract】 By conducting on-site measurements of environmental factors in several major forest types in Jiufeng National Forest Park, a comprehensive evaluation system for summer forest environmental effects was constructed to provide scientific reference for the development of forest health industry.Multiple ecological factors of five representative forest types and control points（CK） in the park were selected to monitor, including air temperature and humidity, atmospheric particle concentration and negative air ion concentration. The diurnal variation of each factor was analyzed and the differences among different forest types were compared. The environmental effects in different forest types were comprehensively evaluated by principal component analysis. The results showed that（1）the daily air temperature of each forest type showed a single peak type curve, and the relative air humidity showed a single valley type curve, with the temperature decreasing 2.63 ℃ and relative humidity increasing 10.38% on average compared to the control point, and the characteristic of human comfort index showed relatively more comfortable in the morning and evening.（2）the daily variation of the atmospheric particle concentration was gradually decreasing, with the daily average purification rate of TSP,PM_1.0, PM_2.5 and PM₁₀ reaching 64.13%,35.26%,44.49% and 57.69% respectively.（3）the daily variation of negative air ion concentration showed a double-peak change, and the daily average value was 899.21 ion per square centimeter, 2.65 times of the control point.（4）the concentration of negative air ions was negatively correlated with air humidity, PM_2.5,PM₁₀ and DIFN,while positively correlated with LAI. The PM_2.5 mass concentration was positively correlated with PM₁₀ mass concentration, humidity, and DIFN,while negatively correlated with temperature and LAI. The ranking of the comprehensive evaluation results of environmental effects was coniferous and evergreen broad-leaved mixed forest>evergreen broad-leaved forest>deciduous broad-leaved forest>coniferous and deciduous broad-leaved mixed forest>evergreen deciduous broad-leaved mixed forest. The comprehensive environmental effect of coniferous and evergreen broad-leaved mixed forest was the highest, mainly composed of Pinus elliottii and Castanopsis sclerophylla. For different forest types, due to the different tree species composition, density, age structure and individual tree distribution in forest land, the effects of forest on the environment are different.更多还原