通过对COM-3200PRO空气离子检测仪数据接收方式的改造,使得数据监测与接收空间分离,实现了野外试验24 h不间断的监测.主要监测了杨树林、白蜡林、核桃林、侧柏林4种河南省常见林分类型的空气负离子浓度日变化规律,结果表明,4种林分类型均表现出了相同的日变化规律,即最低值出现在日出前,最高值出现在14:00左右,4种林分类型空气负离子浓度日均值差异明显,其大小排序为杨树林＞白蜡林＞侧柏林＞核桃林.%Through transformation of data reception method for COM-320OPRO air ion detector, separation of data monitoring and reception space were made and 24-hour monitoring in field experiment was achieved. In this paper, the concentration of air ions diurnal variation was monitored in four common forest types in Henan province, including Populus tomentosa, Fraxinus chinensis, Juglans regia, and Plutycladut orientalis (Linn.) Franco. The experimental results showed that: four forest types had the same diurnal variation. The lowest value occured in early mornings before sunrise, and the highest value in the afternoons around 14 points. The day average concentration of air negative ions in four forest types had significant difference. The values were in an order from hig to small as the following: P. tomentosa > F. chinensis > J. regia > P. orientali.
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