沂蒙山水土保持生态修复试点工程区空气负离子变化特征

Characteristic of negative air ions of ecological rehabilitation' pilot project in Yimeng mountainous area

为了科学评价沂蒙山水土保持生态修复试点工程区环境空气状况,采用日本生产的ITC201A型空气离子测量仪,对修复区不同生态修复类型空气负离子浓度变化情况进行了初步实测与研究,并综合运用CI法、FCI法和隶属度U法3种负离子评价模型对其空气质量进行了评价。结果表明,3种负离子评价模型的评价结果基本一致,即退耕台田苹果经济林地的空气质量最好,其次是麻栎×椴树阔叶混交林、黑松针叶纯林、退耕梯田和荒草地的,道路空气质量较差。有林地区空气负离子浓度明显高于无林地区,阔叶林地空气负离子浓度高于针叶林地。在生态修复措施上注重退耕梯田建设保证修复区粮食安全的基础上,应首先加强退耕台田经济林和生态林封禁措施的实施,田间道路两旁应栽植道路防护林,改善生态修复区内道路周围的空气质量。

With the air ions counter（ITC201A）made in Japan, the spatial changes of negative air concentrations were detected in ecological rehabilitation, air quality was assessed by using ion polarity ratio（FCI）, air ion assessment index（CI）and membership degree（U）. The results showed that results of three assessment models were in substantial agreement, economic forests made up of apple trees：〉bass and oak forested areas〉pine forested areas〉agricultural field〉roadway＇ areas; The negative air ion concentrations in forested areas were obviously higher than those in non--forested areas. The negative air ion in broad--leaved forested area were usually higher than those in coniferous forested area. We should put a high premium on retur ning farmland to forests and food security, on this basis Intensifying construction of ecological forest and road protection forest construction.