不同污染环境下滞尘对典型树种生理特性的影响

Effects of Dust Retention on Physiological Characteristics of Typical Tree Species in Different Pollution Environments

研究了贵州省不同污染环境下不同树种(香樟、长叶女贞、桂花、光皮桦、雪松、马尾松)的滞尘效应及生理特性的变化特征。结果表明:随着研究地实际颗粒物污染程度的加重,植物的滞尘量也增加,如小寨坝、福泉可达到清洁对照区的3～4倍,不同树种滞尘效应大小表现为雪松>桂花>马尾松>光皮桦>香樟>长叶女贞。不同树种叶片叶绿素含量、可溶性糖、可溶性蛋白在不同的污染环境胁迫下均有不同程度的降低,而丙二醛会出现不同程度的增加,其中雪松变化程度小,表明其抗性强,而香樟、长叶女贞变化程度较大,表明其抗性较弱,对污染环境较敏感。

The dust retention effects and physiological characteristics of different tree species ( Cinnamomum camphora,Ligustrum compactum,Osmanthus fragrans,Betula luminifera,Cedrus deodara,Pinus massoniana) under different pollution conditions in Guizhou Province were studied.The results showed that with the increase of particulate pollution,the amount of plant dust retention increased.Xiaozhaiba and Fuquan could reach 3~4 times of the clean control area.The dust retention effect of different tree species was shown as follows Cedrus deodara > Osmanthus fragrans>Pinus massoniana> Betula luminifera>Cinnamomum camphora> Ligustrum compactum.The content of chlorophyll,soluble sugar and soluble protein in leaves of different tree species decreased in different pollution environments,but MDA increased in different degrees.The change degree of Cedrus deodara was small,indicating that its resistance was strong,while that of Cinnamomum camphora,Ligustrum compactum changed greatly,indicating that its resistance to pollution was weak and more sensitive to the pollution of environment.