新余市森林游憩区空气负离子与PM_(2.5)动态变化规律及影响因子特征研究  

Dynamic Changes and Influencing Factors of Negative Air Ions and PM_(2.5) in Forest Recreation Areas of Xinyu City

作　　者：邹璐[1] 丁颖 冯慧[2] ZOU Lu;DING Ying;FENG Hui(Experimental Center of Subtropical Forestry,Chinese Academy of Forestry,Fenyi Jiangxi 336600,P.R.China;School of Public Health,Xinyu University,Xinyu Jiangxi 338004,P.R.China)

机构地区：[1]中国林业科学研究院亚热带林业实验中心,江西分宜336600 [2]新余学院公共卫生与健康学院,江西新余338004

出　　处：《西部林业科学》2024年第1期156-162,共7页Journal of West China Forestry Science

基　　金：新余市指导性科技计划项目(20203090941);国家科技基础资源调查项目(20210709v3)。

摘　　要：为揭示江西省新余市森林游憩区空气负离子与PM_(2.5)时空分布特征、交互效应及其影响因素,对其森林环境中空气负离子和PM_(2.5)浓度时空分布特征及其与气象因子关系进行测定分析。结果显示:(1)新余市森林游憩区与城市绿地空气负离子年变化趋势总体保持一致,全年中各月份森林空气负离子浓度均显著高于城市绿地;1月、3月和4月城市绿地PM_(2.5)浓度显著高于森林,其他月份差异不明显;夏季6—8月空气负离子和PM_(2.5)浓度分别达到其全年最高值和最低值。(2)森林环境空气负离子浓度随海拔升高呈逐渐上升的趋势,PM_(2.5)含量呈先上升再下降的趋势;随距地面垂直高度的增加,林分中空气负离子浓度先下降再上升后保持不变,PM_(2.5)含量逐渐降低,距地面高10 m处林冠中层具有较高的空气负离子和较低的PM_(2.5)含量。(3)不同季节森林空气负离子与PM_(2.5)浓度均呈显著负相关,与空气气压、温度、相对湿度、风速和风向相关性各不相同。结果表明:新余市森林游憩区夏季、1000 m海拔山地、林冠层中部空气质量最优,是建设森林空气保健、疗养活动的理想场所。To reveal the spatiotemporal distribution patterns,interactive effects,and influencing factors of negative air ions and PM_(2.5) in the forest recreation area of Xinyu City,Jiangxi Province,the spatiotemporal distribution characteristics of air negative ions and PM_(2.5) concentrations in its forest environment and their relationship with meteorological factors were measured and analyzed.The results showed that the annual trend of negative air ions in the Xinyu city forest recreation area and urban green spaces was generally consistent.The negative air ions concentration in the forest was significantly higher than that in the urban green spaces in each month of the year,and the PM_(2.5) concentration in the urban green spaces was significantly higher than that in January,March,and April,with no significant difference between other months.The concentrations of negative air ions and PM_(2.5) in the air from June to August in summer reached their highest and lowest values throughout the year,respectively.The concentration of negative ions in forest air gradually increased with altitude,while the content of PM_(2.5) first increased and then decreased,as the vertical height from the ground increased,the concentration of air negative ions in the forest first decreased,then increased and remain unchanged.The PM_(2.5) content gradually decreased,and the middle layer of the forest canopy at a height of 10 meters from the ground had higher negative air ions and lower PM_(2.5) content.There was a significant negative correlation between forest negative air ions and PM_(2.5) concentration,and the correlation with meteorological factors was not consistent,but the correlation with air pressure,temperature,relative humidity,wind speed,and direction was not consistent in different seasons.The forest recreation area in Xinyu city has the best air quality in summer,with an 1000 m altitude of mountainous areas,and in the middle of the forest canopy,making it an ideal place for building forest air health and recuperation activities.

关 键 词：空气负离子 PM_(2.5) 空气质量 新余市 森林游憩区 

分 类 号：S718.5[农业科学—林学] S788.2