摘要
为探讨珠江三角洲马尾松年轮S含量作为生物指标追踪区域大气污染历史变迁的意义,该文通过树木年轮化学分析方法,研究了肇庆鼎湖山和南海西樵山马尾松木质部S含量的时间变化规律。结果表明,两地马尾松木质部S平均含量随时间的增长呈明显上升趋势,在最晚形成的木质部中S含量最高;在20世纪80年代以前,两地相同时期的马尾松木质部S含量差异不显著,80年代后,西樵山马尾松木质部S含量显著高于同期鼎湖山马尾松木质部S含量;从两地马尾松木质部S最终年表发现,木质部S含量存在着1970年前、1971—1985年和1986—2002年3个明显区别的时段;基于两地马尾松木质部中S含量时间变化规律,结合珠江三角洲20世纪80年代以后的某些特定经济指标分析,恢复了研究地大气污染历史:1941—1970年为大气相对清洁期;1971—1985年为大气污染开始出现并持续增强期;1986—2002年为大气污染最严重期。
In order to identify the potential of sulphur （S） content in the rings of Masson pine in the Pearl River Delta as a bio-indicator to regional history of atmospheric pollution, used to determine the temporal distribution of S content in the xylem of Masson pine from （ Pinus massoniana ） dendrochemistry was Zhaoqing Dinghushan Mountain and Nanhai Xiqiaoshan Mountain, Guangdong Province, southern China. The results indicated that the content of xylem S increased temporally and peaked in the rings formed in the latest years at the both sites. In the rings formed at the same periods before the 1980s, S content was not significantly different between the two sites, while in the rings formed at the same periods after the 1980s, S content at Xiqiaoshan Mountain was significantly higher than that at Dinghushan Mountain. The chrono-sequences of S index at the both sites could be easily marked as three periods： before 1970,1971-1985 and 1986-2002. Based on the temporal changes of the xylem S content and certain social-economic index after the 1980s in the delta, the history of atmospheric pollution at the studied sites could be reconstructed as the followings： 1 ） before 1970, a period in which the air was relatively clear; 2） 1971-1985 ,a period in which the air was gradually polluted; 3） 1986-2002,a period in which the air was most severely polluted in the delta.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2008年第2期1-7,共7页
Journal of Beijing Forestry University
基金
国家自然科学基金项目(30570349)
中国科学院研究生科学与社会实践资助专项
中国科学院华南植物园博士启动项目
中国科学院知识创新工程重要方向项目(KSCX2-SW-120)
关键词
珠江三角洲
马尾松
年轮化学
硫元素
环境指示
Pearl River Delta
Pinus massoniana
dendrochemistry
sulphur
enviromental bioindication
