抚顺市环城林整体环境效益分析

Research on integrated environmental efficiency from urban circulating forest in Fushun City

在抚顺市环城林带３个不同功能区，进行连续５天每天３次采样，对环城林净化、滞尘、杀菌和减噪的整体环境效应进行了系统的监测分析。结果表明，林带区内与林区外大气均值浓度相比，ＳＯ２、ＮＯｘ、ＴＳＰ分别降低了１３３％、１６０％和４２７％。不同地区刺槐（ＲｏｂｉｎｉａｐｓｅｕｄｏａｃａｃｉａＬ．）叶片吸硫量排序为：市区＞林区外＞林区内；空气中主要污染菌种为细菌，占８８４％；环城林对１～４ｋＨｚ频段噪声的减噪效果最大，减噪效应取决于声源距离和树种。树种减噪效应排序为：油松（ＰｉｎｕｓｔａｂｕｌａｅｆｏｒｍｉｓＣａｒｒ．）＞落叶松〔Ｌａｒｉｘｇｍｅｌｉｎｉ（Ｒｕｐｒ．）Ｒｕｐｒ．〕＞刺槐。

The integrated environmental efficiencies of purification, stagnant dust, kill airborne microbe and reducing noise exerted by urban circulating forest were systematically monitored and analysed by installing monitoring spots and continually sampling for 5 days (3 times a day) in 3 function districts in Fushun City. The results showed that the average concentrations of SO 2 , NO x , TSP inside forest belt were reduced 13.3%, 16.0% and 43.2% respectively in comparison with that outside forest belt. The sulphur content in Robinia pseudoacacia L. leaves at different districts was in following order: urban>forest outside>forest inside. The bacteria in air was main one in polluted microbe variety with a composing of 88.4%. There was a substantial effect of killing airborne microbe in urban circulating forest. The most noise reduction effect from urban circulating forest was within 1～4 kHz frequencies, varying on distance from forest belt, also on tree species, that is, Pinus tabulaeformis Carr.> Larix gmelinii (Rupr.) Rupr.> Robinia pseudoacacia L.