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利用植物监测大气污染早已为人们所发现,但目前多从植物(如紫花苜蓿、向日葵,地衣等)叶片出现的伤害症状来估测大气受污染的程度。植物能吸收大气中的污染物质,使叶片含污染物质的量增加。并且污染物质在植物体内的含量有一定的稳定性,能比较准确地反映大气的污染程度。利用分析叶片污染物质含量来估测大气的污染状况是切实可行的。 几年来我们研究了植物对大气污染的净化能力,对桂林市内和市郊十多种主要绿化植物叶片污染物质含量进行了分析。并为了利用分析叶片污染物质含量来监测环境。对桂花树叶片含硫量分析监测大气的SO_2污染作了一些工作,现将结果进行整理如下,供参考。
The use of plants to monitor atmospheric pollution has long been found, but now more from the plant (such as alfalfa, sunflowers, lichens, etc.) the appearance of injury symptoms to assess the degree of atmospheric pollution. Plants absorb atmospheric pollutants, increasing the amount of contaminants in the leaves. And the content of pollutants in the plant has a certain stability, can more accurately reflect the degree of atmospheric pollution. It is practicable to estimate the atmospheric pollution by analyzing the content of pollutants in leaves. Over the past few years we have studied the ability of plants to purify air pollution and analyzed the pollutant content of leaves in more than ten major afforestation plants in and out of Guilin. And to monitor the environment in order to analyze the content of contaminants in the leaves. Sulfur content of osmanthus tree leaves to monitor the atmospheric pollution of SO 2 made some work, the results are summarized below, for reference.