2004-2013年山东省森林碳储量及其碳汇经济价值

森林作为陆地生态系统的主体，其林分碳储量及其碳汇经济价值的估算是全球碳循环研究的热点和重要内容。基于2004-2008年和2009-2013年山东省森林资源清查数据以及实测样地数据改进的生物量蓄积量转换参数，利用生物量转换因子连续函数法，估算2004-2013年山东省森林碳储量及其碳汇经济价值动态。研究结果表明，2004-2013年山东省森林面积、碳储量和碳密度分别从2004-2008年的156.12×10⁴hm²、34.75Tg C和22.26Mg C/hm²增加到2009-2013年161.44×10⁴hm²、43.98Tg C和27.24Mg C/hm²。人工林是森林面积、碳储量和碳密度增加的主要贡献者，人工林和天然林对森林生物量碳汇的贡献分别为97.3%和2.7%。两次森林清查期间，杨树和硬阔软阔类森林的碳储量之和分别占全省总量的70.2%和69.6%，杨树的碳储量和碳密度增加最为显著。各龄组森林碳储量由大到小依次为：幼龄林 > 中龄林 > 成熟林 > 近熟林 > 过熟林。森林碳汇经济价值从2004-2008年的243.37亿元增长到2009-2013年的253.42亿元，年均增长2.01亿元，杨树的碳汇经济价值占全省所有森林类型的60%，赤松单位面积碳汇经济价值最强为2.08万元/ha。

Biomass carbon stocks and economic value dynamics of forests in Shandong Province from 2004 to 2013

Forests play an important role in global carbon sequestration and climate change mitigation strategies because they are the main component of a terrestrial ecosystem. The dynamic biomass carbon stocks and carbon sink economic value assessment of forests are important ways of assessing the global carbon cycle. Based on the forest inventory data between 2004-2008 and 2009-2013 in Shandong Province, and the updated biomass-volume relationship retrieved from field measurements, the dynamic changes of biomass carbon stocks and the economic value for Shandong''s forests from 2004 to 2013 were estimated using the continuous biomass expansion factor method. The results showed that forest areas, biomass carbon stocks, and carbon density increased significantly from 156.12×10⁴hm², 34.75Tg C and 22.26Mg C/hm² between 2004 and 2008 to 161.44×10⁴hm², 43.98Tg C and 27.24Mg C/hm² between 2009 and 2013 in Shandong, respectively. Planted forests dominantly contributed to the increases in forest areas, biomass carbon stocks, and carbon density. About 97.3% and 2.7% of the biomass carbon sink were contributed by planted and natural forests, respectively. The biomass carbon stocks of Populus and hard broadleaf and soft broadleaf forests accounted for 70.2% of the provincial total during the period 2004-2008 and 69.6% during the period 2009-2013. Populus forests held the highest increase in biomass carbon stocks and carbon density during the study period. The magnitude of biomass carbon stocks followed the sequence young forests > middle-aged forests > mature forests > premature forests > overmature forests. The total economic value of the biomass carbon sink for Shandong''s forests increased from RMB 24.337 billion yuan for the period of 2004-2008 to RMB 25.342 billion yuan for the period of 2009-2013, with the increment of RMB 0.201 billion yuan per year. The economic value of Populus forests amounted to 60% of the total for all forest types in Shandong. Pinus densiflora forests had the greatest carbon sink economic value per unit area of 2.08×10⁴yuan/hm².