5种阔叶树种群落空气负离子特征研究

以闽北5个阔叶树种闽粤栲、酸枣、木荷、米老排和桤木群落为研究对象，采用DLY-3 F型森林大气离子测量仪测定全天不同时段空气负离子含量，并对不同树种纯林空气离子水平进行比较。结果表明，不同树种纯林空气负离子水平在0.9×103～1.5×103 ions/cm3范围内，其空气质量均属于A级，2个引进树种纯林的空气质量CI值优于3个乡土树种纯林；5个树种纯林空气负离子含量在8：00-10：00能够达到峰值，但各树种到达峰值的时刻则不相同；5个树种纯林日间空气负离子水平存在显著差异，2个引进树种纯林日间空气负离子水平没有显著差异，3个乡土树种纯林日间空气负离子水平没有显著差异，但其间相关程度并不高。

Research on Air Anion Characteristics of Five Broad-Leaved Trees

Taking five broad-leaved trees of Castanopsis fissa,Ziziphus jujube,Schia superba,Ytilaria laosen-sis,Alnus creastogyne as research object,the forest atmospheric ion meter of DLY-3F was used to measure the con-tent of air anion concentration at different time throughout the day,and then compared the air ion levels on five for-ests. The results showed that,the air anion levels in five pure forest was ranged in 0.9 ×103 -1.5 ×103 ions/cm3 , and the air quality reached to grade A.The air quality CI value of two introduced species was better than that of other three native species.Moreover,the negative air ions concentration of five pure forests could reach the peak at 8：00-10：00,but the detailed time was varied.Air anion levels of five pure forest existed significant differences in the day.However,there was no significant difference between two introduced species during the day,similar re-sults were seen among the three native species,but there was no high correlation.