叶片理化指标与绿化植物净化大气能力的相关性分析  

A Correlation Analysis of Plants for Afforestation between Physico-Chemical Indicators of Leaves and Their Air Cleaning Capacities

作　　者：蔡静萍 陈丽萍 申哲民[2] 殷杉 邹晓东 王文华 

机构地区：[1]上海市浦东新区环境保护和市容卫生管理局,上海200135 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《上海环境科学》2008年第2期77-81,共5页Shanghai Environmental Sciences

摘　　要：植物叶片背面有大量的微小气孔，植物通过这些气孔进行呼吸，因此可以净化大气中的污染物。通过对浦东新区种植的香樟、广玉兰，夹竹桃、石楠等4种常见的绿化植物叶片采样，测定其理化指标、含硫量和含氮量。分析后得出以下结论：（1）在4种研究的绿化植物中，叶片含硫量和含氮量较高的是广玉兰和香樟；香樟吸收SO2、NOx的能力最强；广玉兰抗酸性气体侵害的能力最强。（2）植物叶片细胞液的pH值、对酸的缓冲能力与叶片中硫和氮的含量有着显著的相关性，是植物吸收、净化大气中含硫化合物和含氮化合物的主要控制因素。植物叶片中pH值越高、酸缓冲能力越强，越有利于吸收大气中的酸性气体（如SO2、NOx等）。On the backside of plant leaves there are many tiny air vents, through which the plants absorb air pollutants whilst taking respiration. Through analysing the physico-chemical indicators, sulphur and nitrogen contents in the leaves of camphor tree （Cinnamomum camphora）, bull bay （Magnolia grandiflora L.）, oleander （Nerium oleander L.）, Chinese photinia （Photinia serrulata Lindl.）, and etc., the local prevailing vegetations, the effects of absorbing sulphur and nitrogen compounds in the air were studied. It has primarily been revealed that there were marked correlations among pH values of the leaves＇ cell sap, buffering capacity, and sulphur and nitrogen contents in the leaves. It showed that （1） higher pH value and stronger acidic buffering capacity of the leaves both helped absorbing acidic gases such as SO2, NOx and etc. in the air, （2） camphor tree was the most capable of absorbing the acidic gases and bull bay had the highest capacity to resist the acidic gases.

关 键 词：绿化植物 气孔呼吸 大气净化 酸性气体 PH值 缓冲能力 

分 类 号：X517[环境科学与工程—环境工程] Q945.11[生物学—植物学]