Acidity and conductivity of Pinus massoniana bark as indicators to atmospheric acid deposition in Guangdong, China

作     者：KUANG Yuan-wen ZHOU Guo-yi WEN Da-zhi LIU Shi-zhong 

作者机构：Institute of Ecology South China Botanical Garden＇ Chinese Academy of Sciences Guangzhou 510650 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2006年第18卷第5期

页      面：916-920页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：The National Natural Science Foundation of China (No. 30370283), the CAS Orientation Project (No. KSCX2-SW-120 KSCX2-SW-133) and the Natural Science Foundation of Guangdong Province (No. 04002306) 

主　　题：acidity conductivity inner bark outer bark Pinus massoniana 

摘      要：Barks of Pinus massoniana collected from two polluted sites, Qujiang and Xiqiaoshan, and from the relatively clean site Dinghushan were used to evaluate the pollution indication by the determination of their acidity and conductivity. The acidity of the inner and outer barks from the polluted sites was significantly higher than those from the clean site, suggesting that the acidity of the bark occurred in concurrent with the air pollution. The significant lower pH values of the outer bark than the inner bark collected from all sites indicated that the outer bark was more sensitive than the inner bark in response to acid pollution, implying that the outer bark is more preferable when used as indication of atmospheric acid pollution. The conductivities of the inner barks differed significantly among the three sites, with higher values at the clean site. However, the significant differences were not observed among these sites. Furthermore, the pH values for the inner and outer barks were not correlated with the conductivity, which did not coincide with some other studies.