摘要
重庆市南郊的南山是一个风景区,有林地约二万七千余亩,主要是马尾松林(Pinusmassoniana Lamb.),自八十年代起明显出现衰亡现象,目前约有85％马尾松植株受到不同程度的伤害,死亡率达35％左右.马尾松出现的症状是针尖坏死,针叶提早脱落,针长变短,树冠稀疏,枝条枯死,径向生长变弱等.
The forest, mainly masson pines (Pinus massoniana Lamb) in Nanshan, Chongqing has exhibited decline since the beginning of the 1980's.According to the results of the diagnosis of injury symptoms, the determination of sulfur and fluorine contents of leaves and the monitoring of the atmospheric S02 and fluoride in the area, it may be concluded that the air pollution by SO2 and fluoride is the major cause of the decline of the forest. The contributions by acid rain, acid fog and pests to the decline were discussed as well.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1990年第3期378-383,共6页
Acta Scientiae Circumstantiae
关键词
马尾松
大气污染
二氧化硫
重庆
masson pine
forest decline
air pollution
SO_2
fluoride.
