河南黄淮海平原农田防护林空气负离子变化规律

Variation Regularity of Air Anion in Agroforestry Ecosystem in Huang-Huai-Hai Plain in Henan Province

选择河南境内黄淮海平原主体区域的商丘市民权林场的农田防护林,测定其生态系统1年内各月份的空气负离子的日进程,分析了空气负离子的变化规律及其与空气温度、相对湿度的相关关系。结果表明:空气负离子浓度在6-8月份较高,冬季较低,秋季居中,春季变化较大;日进程的变化曲线基本上近似"U"型,但在细微变化上更接近多峰型式。空气负离子浓度在不同植被类型间存在显著性差异,但冬、秋季不显著,在防护林带内各点差别也较小;描述瞬间变化较大的空气负离子浓度,若采用平均值很有可能高于实际数值,应采用更多统计特征值会更适宜些。空气负离子浓度与气象因素间的相关性随季节而不同,在秋季与冬季相关性较小,在夏季与春季相关性较大;在分析其相关性时,分要素分析比综合的效果要好些。

The Minquan state forest farm in Shangqiu is the main part of Huang-Huai-Hai Plain in Henan Province.Several agroforestry ecosystems were selected to measure the daily variation patterns of air anion in different month in a year.Based on the data observed,the daily and monthly changes of air anion were analyzed,and the relationships were also analyzed among air anion and air temperature,and air humidity. The results showed that the concentrations of air anion were higher in summer（July to Augus）,lower in winter and changed much in spring and autumn.The daily process of air anions basically showed a＂U＂ shape pattern,but multi-peak pattern as for minute variations.There existed significant difference in different agroforestry ecosystems,but little difference in winter and autumn and in different site in the same ecosystem.To describe the instantaneous changes of air anions,more values featured with statistic significance were needed instead of the valued averaged.The correlations between air anions and air humidity or air temperature were significant in spring and summer,but not in winter and in one system.To analyze the relationship,it was better to use the single factor than to use many factors comprehensively.