绿化树种对大气SO_2的净化作用

该文研究了北京市房山区 3 2种主要绿化树种对大气SO2 的吸收、累积特点及其指示与净化作用 .结果表明 :树木对SO2 有吸收累积的作用 ,但不同树种之间差异较大 ,其中绦柳净化SO2 的能力最强 ,刺槐、国槐、构树、连翘、栾树、柿树、紫穗槐等树种也是优良的净化SO2 污染的树种 .从总体上看 ,树木吸收、积累SO2 的能力表现为落叶乔木 >灌木 >常绿针叶树

Effect of purifying SO2 in atmosphere by greening tree species

The characteristics of absorbing and accumulating SO2 in atmosphere,the role as indicators and the effect of purifying SO 2 pollution by 32 greening tree species were studied in the Fangshan District,Beijing. The results show that greening trees are of ability of absorbing and accumulating SO 2 in atmosphere, but there are great differences among varied species, in which Salix matsudana Koidz.f. pendula Schneid. has the greatest ability of purifying SO 2 in atmosphere. Other species, such as Robinia pseudoacacia, Sophora japonica,Broussonetia papyrifera, Forsythia suspensa Vahl., Diospyros kaki, Koelreuteria paniculata and Amorpha fruticosa also have this kind of effect. Generally speaking, flowers and brushes have greater ability of absorbing and accumulating SO 2 than evergreen trees but smaller than deciduous trees.