甲醛和苯复合污染下悬垂植物叶绿素含量变化

Changes of chlorophyll content of overhanging plants under compound pollution of formaldehyde and benzene

利用植物治理甲醛和苯等室内化学污染目前已成为室内化学污染生态修复技术的前沿和热点。植物体内叶绿素(Chl)含量的变化是判断植物受室内空气化学污染胁迫下抗性大小的重要依据。文章采用人工熏气模拟实验,通过方差分析和多重比较,分析了8种常见的室内悬垂植物在3种不同浓度甲醛和苯胁迫下的Chl含量变化,并运用隶属函数值法对室内悬垂植物的抗性能力与强弱进行综合评价。结果表明:复合污染物浓度对植物体内Chl含量变化的影响差异达极显著水平;在3种甲醛和苯复合污染的浓度梯度下,常春藤体内Chl变化率最小,抗性能力最强;综合评定3种甲醛和苯复合污染浓度胁迫下,抗性能力最强的是常春藤,金心吊兰次之,最弱的是吊竹梅。

The use of plants to control indoor chemical pollution such as formaldehyde and benzene has now become the frontier and hotspot of indoor chemical pollution ecological restoration technology.The change of Chl content in plants is an important basis for judging the resistance of plants under indoor air chemical pollution stress.This article uses artificial smoke simulation experiments,through analysis of variance and multiple comparison to analyze the Chl content changes of 8 common indoor overhanging plants under three different concentrations of formaldehyde and benzene stress,and uses the membership function value method for indoor comprehensive evaluation of the resistance and strength of overhanging plants.The results showed that:the effect of compound pollutant concentration on the change of Chl content in plants reached a very significant level;under the concentration gradient of three kinds of formaldehyde and benzene compound pollution,the change rate of Chl in Hedera nepalensis was the smallest and the resistance ability was the strongest;comprehensive assessment under the stress of the combined pollution concentration of three kinds of formaldehyde and benzene,the strongest resistance is the Hedera nepalensis,followed by Chlorophytum comosum var.mediopictum,and the weakest is the Tradescantia zebrina.