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提起花卉,人们马上会想到它的美化环境、净化空气的作用。其实,花卉的功能远远不止这些。由于许多花卉对一些特定的有害气体十分敏感,它还可以用作大气污染的监测器呢。二氧化硫是大气中的首要污染物。对二氧化硫敏感的花卉有紫苜蓿、牵牛花、百日草、紫菀、美人蕉、矢车菊、彩叶草、非洲菊、三色堇、天竺葵、散沫花、万寿菊、秋海棠、木槿等。这些花卉的急性伤害浓度为
When we talk about flowers, people immediately think of its role in beautifying the environment and purifying the air. In fact, the function of flowers is far more than these. Because many flowers are very sensitive to certain harmful gases, it can also be used as a monitor of atmospheric pollution. Sulfur dioxide is the primary pollutant in the atmosphere. Flowers susceptible to sulfur dioxide include purpurea, morning glory, zinnia, aster, canna, cornflower, clover, gerbera, pansy, geranium, henna, marigold, begonia, and hibiscus. The acute damage concentration of these flowers is