昆明市6种常见阔叶树叶表面形态与滞尘能力的关系研究

Relationship between Leaf Surface Morphology and Dust Detention Ability of 6 Common Broad-leaved Trees in Kunming City

研究昆明市6种常见阔叶树滞尘机理,为城市行道树选择提供理论依据。采用室内实验对比对照法,对叶片进行滞尘量测定以及同一倍数下叶表面微结构电镜观察,并从叶表面特征分析差异原因。结果表明:不同树种滞尘量差异显著;同一树种,在不同高度滞尘能力差异显著,低位叶片的滞尘能力比高位叶片的滞尘能力强;在电镜下观察叶表面微结构,叶表面气孔密度及开口对滞尘能力影响最大。因此,在进行城市绿化树种选择时,应考虑叶片表面形态对植物滞尘的影响。

Find out the principle of dust retention ability in 6 broadleaf trees in Kunming,which can provide the theoretical basis for the selection of urban street trees. Using the indoor control experiment, the amount of dust absorption and leaf surface morphology were observed by electron microscope.And in the meanwhile, the differences were analyzed from the feature ofleaf surface. The results showed that the amount of dust absorption of different kinds of trees were obviously different;There were significant differences of dust retention ability at different heights in the same tree species,and the ability of dust retention in the lower leaves was stronger than that of the high leaves.Under the electron microscope observation,the stomatal density and opening of leaf surface had the greatest influence on the dust retention. Therefore,the influence of leaf surface morphology on the dust of plants should be considered.