珠江三角洲森林生态系统碳密度分配及其储量动态特征.PDF

中国环境科学 2011,31(Suppl.) ：69~77 China Environmental Science 珠江三角洲森林生态系统碳密度分配及其储量动态特征 * 张修玉,许振成 , 曾凡棠,胡习邦,韩秋萍 (环境保护部华南环境科学研究所,广东 广州 510655) 摘要：在测定植被的含碳率与土壤有机碳含量的基础上,研究了南亚热带珠江三角洲地区森林生态系统碳密度分配及其储量动态.结果表 明:植被平均含碳率为 35.81%~51.60%,按照生物量加权的含碳率为 46.57%~52.45%;土壤有机碳含量及其差异程度为表层最高,随土壤深度 增加,有机碳含量及其差异逐渐减小;相同龄级的植被含碳率与土壤含碳量均表现为阔叶林针阔混交林针叶林,不同龄级的森林均表现为 成龄林 中龄林幼龄林.植被碳密度与土壤碳密度范围分别为 23.58~139.18,55.54~151.16t/hm2,而且土壤分配比例均大于植被分配比例,但 土壤分配比例随着龄级的增长呈下降趋势.1989~2003 年间,珠江三角洲森林生态系统总体碳储量及其碳密度均呈上升趋势,这说明在改革 开放高速发展时期珠江三角洲森林生态系统由于生物量的增加,起到了重要的碳汇功能,而且其碳汇功能正逐步提高. 关键词：森林生态系统；碳分配；碳储量 中图分类号：X171.1 文献标识码：A 文章编号：1000-6923(2011)S0-0069-09 Carbon density distribution and storage dynamics of forest ecosystem in Pearl River Delta of low subtropical * China. ZHANG Xiu-yu, XU Zhen-cheng , ZENG Fan-tang, HU Xi-bang, HAN Qiu-ping (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China). China Environmental Science, 2011,31(Suppl.)：69~77 Abstract ：Based on the vegetation carbon content rate and soil organic carbon (SOC) content that determined, we studied the carbon density and storage dynamics of forest ecosystem in the Pearl River Delta of low subtropical China. The results showed that the average vegetation content rate was ranging from 35.81% to 51.60%, and the average carbon content rate weighted by biomass was ranging from 46.57% to 52.45%. SOC content and its significance were all at the highest level in soil surface layer, and they all faded away with the deepening of soil profile. Moreover, vegetation content rate and soil organic carbon (SOC) content were all in order of broad-leaved forest mixed conifer and deciduous forest conifer forest in the sa