广东省森林碳汇潜力分析

Forest carbon sink potential in Guangdong province

森林碳汇作为解决气候变化问题的途径之一已得到国际社会的承认。以广东省第七次森林资源连续清查资料为基础,利用CO2FIX V3.2软件,研究无林地最优固碳经营方案,模拟广东省2008—2057年的森林碳汇总量以及年增碳汇量的变化情况、新造林和现有有林地森林所固定的碳汇量等。结果表明,当无林地造林全采用商品林时,碳汇效应最大。在所有优势树种中,桉树的固碳能力最突出。广东省森林碳汇的潜力巨大,森林碳汇总量由2008年的172.9 Mt C增加至2057年的692.1 Mt C,累积森林碳汇量为519.2 Mt C,年均增加10.38 Mt C。2008—2057年,广东省新造林累积的碳汇量为176.6 Mt C,现有有林地的碳汇量为342.8 Mt C。

Forest carbon sink has been admitted worldwide as one of the solution to global climate change. Based on the 7^th continuous forest inventory data of Guangdong province, we analyzed the best management strategy in non-forest land. We also simulated the changes of total forest carbon sink and annual growth of forest carbon sink, the forest carbon sink of the new forests and the original forests by CO2 FIX V3.2 software. The results showed that, new forests got most carbon by considering merchant wood. In all dominant tree species, the strongest capacity of carbon sequestration was Eucalyptus. Forest carbon sink in Guangdong Province has great potential. The total amount of forest carbon sink will reach 692.1 Mt C in 2057 from 172.9 Mt C in 2008, accumulating 519.2 Mt C, with the increase of 10.38 Mt C per year. To 2057, the new forests will accumulate carbon sink about 176.6 Mt C, and the original forests will accumulate forest carbon sink about 342.8 Mt C.