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本文于2003年9月到10月在哈尔滨市主要街道采集和分析主要绿化树种的树叶,研究测定了东北主要的24种乔木树种和6种灌木树种对大气重金属污染物铅、镉、铬、汞的吸收能力。结果表明:绿化树种对铅、镉、铬、汞具有一定的吸收能力,并依污染物和树种的不同而有明显差异;根据不同树种对不同大气重金属污染物吸收量的差异将其各分为三级,其中吸铅量高的树种有白桦、垂枝榆和京桃等;吸镉量高的树种有小黑杨、钻天杨、银中杨和旱柳等;吸铬量高的树种有黄菠萝、紫丁香、旱柳、黑皮油松、红皮云杉、京桃、榆叶梅和糖槭等;吸汞量高的树种有榆叶梅、蒙古栎、旱柳、接骨木、野梨和华北绣线菊等。本研究为在不同大气重金属污染条件下选择不同绿化树种提供了科学依据。表4参11。
This paper collected and analyzed the main greening tree leaves in main streets of Harbin from September to October in 2003 and studied the effects of the main 24 tree species and 6 shrub species in the northeast on the effects of heavy metal pollutants such as lead, cadmium, chromium and mercury Absorptive capacity. The results showed that: the afforestation tree had certain absorption capacity for lead, cadmium, chromium and mercury, and had obvious difference according to the difference of pollutant and tree species. According to the differences of absorption amount of heavy metal pollutants of different tree species, Three levels, of which the highest absorption of the birch tree species, weeping willow and Peach Blossom; cadmium cadmium trees have Populus, Drilling, poplar and Salix, etc .; high chromium content of the tree yellow Pineapple, Lilac, Salix, Coprinus comaturn, Picea koraiensis, Peach Blossom, Ulmus pumila and Sugar Maple, etc. The species with high mercury uptake are Ulmus pumila, Quercus mongolica, Pear and North China Spiraea and so on. This study provides a scientific basis for choosing different greening tree species under different atmospheric heavy metal pollution conditions. Table 4 Senate 11.