【摘要】 为了分析南昌城郊森林空气负氧离子浓度变化特征及其环境影响因子，以南昌市城郊森林为研究对象，基于森林空气质量自动监测站，记录测定其林内负氧离子浓度和温度、相对湿度、PM 2.5浓度、风速等环境因子。结果显示：（1）南昌城郊森林负氧离子浓度年平均值为1 787个·cm^-3,达到Ⅱ级清新标准，对人体健康有益；（2）负氧离子浓度日变化表现为“双峰单谷”趋势，清晨和傍晚时分的负氧离子浓度较高；（3）各季节负氧离子浓度依次为秋季>夏季>冬季>春季，不同季节负氧离子浓度日变化也存在一定差异；（4）负氧离子浓度受各环境因子影响不同，与PM2.5含量和相对湿度呈极显著负相关，与平均风速正相关，但与温度的相关性不明显。南昌城郊森林空气负氧离子浓度存在明显的变化特征，在夏秋季的清晨或傍晚时分，最适合开展森林游憩和户外运动。更多还原

【Abstract】 To analyze the change characteristics of negative oxygen ion concentration in forest air and its environmental impact factors in suburban Nanchang, the forest on the outskirts of Nanchang city was taken as the research object, and the concentration of negative oxygen ions, temperature, relative humidity, PM 2.5 concentration, wind speed and other environmental factors were recorded and measured based on the forest air quality automatic monitoring station. The results indicated:（1） The annual average concentration of negative oxygen ions in suburban forests of Nanchang was 1 787 ·cm^-3,which reached the level II fresh standard and was beneficial to human health;（2） The diurnal variation of the concentration of negative oxygen ions showed a trend of “double peaks and single valleys”,and the concentration of negative oxygen ions was higher in the early morning and evening.（3） The concentration of negative oxygen ions in each season was in the order of autumn>summer>winter>spring, and the diurnal variation of negative oxygen ion concentration in different seasons also had certain differences;（4） The concentration of negative oxygen ions is affected by different environmental factors, and is significantly negatively correlated with PM2.5 content and relative humidity, positively correlated with average wind speed, but not significantly correlated with temperature.The concentration of negative oxygen ions in forest air in suburban Nanchang city has obvious change characteristics, and it is most suitable for forest recreation and outdoor sports in early morning or evening in summer and autumn.更多还原