四川省退耕还林工程林碳汇潜力研究

Carbon Sequestration Potential by Grain for Green Programs in Sichuan Province

为估算四川省退耕还林工程林的碳汇潜力,调查分析了四川省2000-2007年退耕还林工程逐年造林的树种、面积等数据资料,利用国家森林资源清查资料中四川省的人工林生长历史数据模拟人工林生长曲线,借助该曲线并结合经调研国内外文献所得林分树种的生物质密度、碳含量、生物量开展系数等生物物理参数,设计出林分碳储量变化计算模型。计算结果表明,四川省退耕还林工程林的稳定碳积累量在2010、2020、2030、2040及2050年,分别为(14.276～14.740)×1012、(33.463～41.059)×1012、(43.796～57.915)×1012、(50.254～70.124)×1012和(54.024～77.655)×1012g C。退耕还林工程林具有显著碳汇功能。

Analysis was made on affforestated area and tree species planted from 2000 to 2007 in Sichuan province to estimate carbon sequestration potential by Grain for Green Programs （GGP）. Growth curves for different tree species were derived based on data from National Forestry Inventory. With these curves represent the average growth rate of plantations under various climates and site conditions calculation models used for estimating carbon stocks in the GGP stands in combination of wood density （WD）, biomass expansion factors （BEF） and carbon fraction （CF）. Results showed that the carbon stocks in the GGP stands in Sichuan province will reach 26.538-27.368, 53.065-65.116, 58.825-87.533, 68.889-103.712 and 77.718-113.078 Tg C（T=1012） by the year of 2010, 2020, 2030, 2040 and 2050, indicating remarkable carbon sequestration potential in the GGPstands in Sichuan province.