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Forest and Grassland Resources Research >

2022 , Vol. 0 >Issue 5: 84 - 90

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2022.05.011

Scientific Research

Concentration of Negative Oxygen Ion and Its Influencing Factors in Coniferous and Broad-Leaved Mixed Forest in the Suburbs of Nanchang City

  • Haofan TANG ,
  • Qiaohua WU ,
  • Liyan WANG ,
  • Chen ZHOU ,
  • Hua WANG ,
  • Lan DI ,
  • Kunshui LUO
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  • Nanchang Urban Ecosystem National Orientation Observation and Research Station,Jiangxi Academy of Forestry,Nanchang 330013,China

Received date: 2022-08-09

  Revised date: 2022-10-24

  Online published: 2022-12-23

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Abstract

Concentration of air negative oxygen ions(NOI) plays an important role in evaluating forest health effects and promoting human physical and mental health.In order to explore the level of negative oxygen ions in the air of urban forest environment,this study took coniferous and broad-leaved mixed forest in the suburbs of Nanchang city as the research object,and conducted long-term on-site monitoring of NOI concentration,air PM2.5 content,temperature and relative humidity within 24 hours from January 2021 to December 2021.The negative oxygen ion concentration and its influencing factors in coniferous and broad-leaved mixed forest were analyzed to explore the temporal dynamic mode of NOI.The results showed as follows:1)The average annual concentration of NOI in the forest was 1786 ind/cm3,which reached the level ⅱ fresh standard and was beneficial to human body;2)The diurnal variation of NOI concentration in the forest showed a "double-peak and single valley" trend,that was,the concentration of NOI was the highest at 05:00,the second highest at 17:00,and the lowest at 12:00,and the concentration in the period without sunshine was higher than that in the period with sunshine;3)Due to the seasonal changes,the NOI concentration was characterized as autumn>winter>summer>spring;4)Correlation analysis results showed that NOI concentration was negatively correlated with air PM2.5 content and positively correlated with relative humidity,but temperature had no obvious effect.These results can provide references for assessing the ecological benefits of urban forestry and for citizens to arrange outdoor sports and forest conservation activities.

Key words： negative oxygen ion; change of concentration; influencing factor; coniferous and broad-leaved mixed forest; Nanchang City

Cite this article

Haofan TANG , Qiaohua WU , Liyan WANG , Chen ZHOU , Hua WANG , Lan DI , Kunshui LUO . Concentration of Negative Oxygen Ion and Its Influencing Factors in Coniferous and Broad-Leaved Mixed Forest in the Suburbs of Nanchang City[J]. Forest and Grassland Resources Research, 2022 , 0(5) : 84 -90 . DOI: 10.13466/j.cnki.lyzygl.2022.05.011

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