南方农业学报2024，Vol.55Issue(4)：1107-1117,11.DOI:10.3969/j.issn.2095-1191.2024.04.019
扬州城市森林负氧离子分布变化特征及其与气象因素的关系
Variation characteristics of negative oxygen ions distribution in Yangzhou urban forest and its relationship with meteorological factors
摘要
Abstract
[Objective]This study aimed to analyze the spatial and temporal variation of air negative oxygen ion con-centration in Yangzhou urban forests,and to provide a theoretical basis for the understanding of air negative oxygen ion resources in urban forests of Yangzhou.[Method]Relying on the Jiangsu Yangzhou Urban Forest Ecosystem National Monitoring and Research Station,the study focused on Songjiacheng Sports and Leisure Park(urban forest),Mastixia Bay Scenic Area(suburban forest),and Runyang Wetland Forest Park(distant urban forest).Data on negative air ion concentrations and forest meteorological factors were collected from these three regions from January to December 2020.The differences in negative air ion concentrations between different seasons were compared,the correlation between nega-tive air ion concentrations and meteorological factors was analyzed,and the contribution rates of various meteorological factors to air negative ion concentrations were analyzed using enhanced regression trees.Structural equation modeling was used to analyze the direct and indirect effects of various meteorological factors on negative oxygen ion.[Result]In the su-burban forest area of Yangzhou,the diurnal variation of negative oxygen ion concentration displayed a unimodal pattern.The monthly change trend of urban suburban forest matched consistently with the peak values occurring in April and June.The seasonal average negative oxygen ion concentration in suburban forest was spring>winter>summer>autumn,and the average negative oxygen ion concentration in suburban forest was summer>winter>spring>autumn.The annual average value of negative oxygen ion concentration(666.87 ions/cm3)and canopy density(0.80)were lower than those in urban forest and suburban forest,and the higher canopy density,the smaller the coefficient of variation of negative oxygen ion concentration.There was a significant(P<0.05,the same below)or extremely significantly(P<0.01,the same below)correlation between the concentration of air negative oxygen ions and wind speed,air pressure,air temperature,and PM2.5 in the urban forest area,whereas the concentration of negative oxygen ions in suburban forest and distant urban fo-rest had a significant or extremely significant correlation with barometric pressure,wind speed,air temperature,air hu-midity,PM2.5,illumination intensity,and other in-forest meteorological elements.The contribution of meteorological fac-tors to the concentration of negative oxygen ions in the air,as well as structural equation modeling,was selected for the urban distant suburban forest.The results showed that air humidity contributed the most to the concentration of negative oxygen ions in spring(38.51% )and autumn(47.58% ),while PM2.5 contributed the most to the negative oxygen ions in summer(27.87% )and winter(38.51% ).Air humidity had a direct positive effect on negative oxygen ion concentration,while illumination intensity had a direct negative effect on negative oxygen ion concentration,and wind direction had an indirect effect on negative oxygen ion concentration by changing PM2.5.[Conclusion]The pattern of change of negative oxygen ion concentration in forests in different regions of Yangzhou is different,and different seasons and times have ob-vious effects on the negative oxygen ion concentration.According to the difference of negative oxygen ions in different areas and the seasonal change rule of its performance,different park tour plans can be developed,it is recommended to go to the distant urban forest in the summer,and to the suburban forest in the spring tour.关键词
空气负氧离子浓度/城市森林/气象因素/扬州Key words
air negative oxygen ion concentration/suburban forest/meteorological factors/Yangzhou分类
农业科技引用本文复制引用
连经纬,邢玮,万欣,葛之葳,何冬梅..扬州城市森林负氧离子分布变化特征及其与气象因素的关系[J].南方农业学报,2024,55(4):1107-1117,11.基金项目
国家自然科学基金面上项目(32171856) （32171856）
江苏省林业科技创新与推广项目(LYKJ[2020]21) （LYKJ[2020]21）
江苏省农业科技自主创新资金项目[CX(19)1004] General Project of National Natural Science Foundation of China(32171856) （19）
Jiangsu Forestry Science and Technology Innovation and Promotion Project(LYKJ[2020]21) （LYKJ[2020]21）
Jiangsu Agricultural Science and Techno-logy Independent Innovation Project[CX(19)1004] （19）
