调查酸沉降和大气污染对华南典型森林生态系统植物生物量的影响。结果发现,环境污染对树木的生长以及森林生物量影响较大。采用树干解析方法研究发现,不管是尾叶桉还是马尾松其树高、胸径和材积连年生长量基本趋势是污染地区样地比清洁区样地低。尾叶桉和马尾松林分中的生物量也是污染区样地比清洁区样地低。污染区样地中尾叶桉和马尾松林分总生物量分别为66.89t·hm-2和77.56t·hm-2,仅分别为清洁区的78.89%和94.49%。环境污染均促进这两个树种根系的生长,而抑制其干材的生长。尾叶桉和马尾松根系生物量占林木层生物量比例:污染区样地分别为65.16%和15.08%;清洁区分别为40.50%和14.48%。此两个树种干材生物量占林木层生物量比例:污染区样地分别为19.87%和57.71%;清洁区分别为38.15%和70.33%。本研究结果将为华南地区森林生态系统的保护提供科学依据。 To investigate the effects of acid deposition and air pollution on plant biomass of typical forest ecosystems in South China. The results showed that environmental pollution has a great impact on the growth of trees and forest biomass. The trunk analysis method was used to find that the basic trend of annual growth of DBH and volumetric DBH of either Eucalyptus urophylla or Pinus massoniana was that the sampling area in the contaminated area was lower than that in the clean area. Biomass in Eucalyptus urophylla and Pinus massoniana forest was also lower in the contaminated area than in the clean area. The total biomass of Eucalyptus urophylla and Pinus massoniana forest in the contaminated area plots were 66.89t · hm-2 and 77.56t · hm-2, respectively, only 78.89% and 94.49% of that in the clean area respectively. Environmental pollution promotes the growth of the roots of both tree species and inhibits the growth of their dry materials. Biomass of biomass of Pinus elliottii and Pinus massoniana forest layer accounted for 65.16% and 15.08% of the total biomass in the contaminated area respectively. The clean area was 40.50% and 14.48% respectively. The biomass of biomass of the two tree species accounted for 19.25% and 57.71% of the biomass in the forest layer, respectively; the clean area was 38.15% and 70.33% respectively. The results of this study will provide a scientific basis for the protection of forest ecosystems in southern China.