香溪洞公园主要林分生长季负氧离子及PM2.5浓度日变化特征研究  

Variation of Negative Oxygen Ions and PM2.5 in the Main Forest Stands of Xiangxidong Park during the Growing Seasons

作　　者：赵宝鑫[1] 荣海 ZHAO Bao-xin1 ,RONG Hal2(1Ankang Forestry Technology Extension Center, Ankang , Shaanxi 725000; 2. Shaanxi Hualongshan National Nature Reserve Administration, Ankang, Shaanxi 72500)

机构地区：[1]安康市林业技术推广中心 [2]陕西化龙山国家级自然保护区管理局,陕西安康725000

出　　处：《陕西林业科技》2017年第6期7-10,共4页Shaanxi Forest Science and Technology

基　　金：安康市科技局项目(2015AK05-03)

摘　　要：本文选取针阔混交林、针叶林、阔叶林、竹林四种典型林分,研究了香溪洞公园主要林分生长季负氧离子和PM2.5浓度日变化规律,结果表明,负氧离子浓度由高到低依次是针阔混交林>阔叶林>竹林>针叶林,PM2.5浓度由低到高依次是阔叶林<针阔混交林<竹林<针叶林;四种林分整体均负氧离子浓度呈现"早晚高,中午低"的日变化趋势,PM2.5浓度日变化趋势相反;PM2.5与温度呈正相关,负氧离子与温度呈显著负相关,与相对湿度显著正相关,负氧离子和PM2.5呈现显著负相关。This research selected four typical forest types as objectives： coniferous and broad-leaved mixed forest, coniferous forest, broad-leaved forest and bamboo forest are studied in terms of the dai- ly change of their negative oxygen ions and PM2.5. The result showed that the average negative oxy- gen ion concentration from high to low follows the order： conifer and broad-leaved mixed forest〉 broadleaf forest〉 bamboo〉 coniferous forest, and the average PM2.5 concentration from low to high follows the order： broad-leaved forest 〉 coniferous broad-leaved mixed forest 〉 bamboo forest 〉 coniferous forest. The negative oxygen ion concentration of the four forest types showed the diurnal trend of being high in morning and evening and being low at noon. The diurnal variation trend of PM2.5 concentration was just the opposite. Concentration of PM2.5 was positively correlated with temperature while the negative oxygen ions negatively correlated with the temperature and positively correlated with relative humidity. Significant negative correlations exist between negative oxygen ions and PM2.5.

关 键 词：负氧离子 PM2.5 林分 

分 类 号：S794.9[农业科学—林木遗传育种]