基于森林资源二类调查的县域森林碳汇及其价值估算研究——以湖北省当阳市为例

Research on County Forest Carbon Sink and Its Value Estimation Based on the Second Class Investigation Survey of Forest Resources: A case of Dangyang of Hubei Province

基于当阳市第四次(2009年)和第五次(2019年)森林资源二类调查成果,运用生物量转换因子法,对森林生物量进行了估算;运用生物量-碳储量转换系数法,估算了森林碳储量;按照IPCC(2006年)提供的库-差别方法,对当阳市2009~2019年10 a期间森林碳汇量进行了估算,采用均值法(市场价值法和造林成本法平均值),评价了当阳市森林碳汇价值。结果表明:2009年和2019年当阳市森林碳储量分别为98.20×10^(4)tC和147.42×10^(4)tC;平均碳密度分别为14.27 tC·hm^(-2)和22.23 tC·hm^(-2)(含地上部分和地下部分,不包括枯死木、枯落物和土壤有机碳);2009~2019年10 a期间当阳市森林碳汇量为180.47×10^(4)tCO_(2)(49.22×10^(4)tC),单位面积年碳汇量为2.93 tCO_(2)·hm^(-2)·a^(-1)(0.8tC·hm^(-2)·a^(-1));2009至2019年10 a期间当阳市森林碳汇价值达1.0亿元,单位面积年碳汇价值为162.32元·hm^(-2)·a^(-1)。

Based on the results of the fourth(2009) and fifth(2019) forest resources survey results in DangYang, the biomass conversion factor method was used to estimate the forest biomass;Using the biomass-carbon storage conversion coefficient method(biomass carbon content rate),the forest carbon storage was estimated;according to the pool-difference method provided by IPCC(2006),the forest carbon sink during the 10-year period from 2009 to 2019 was estimated, using the mean value method(The average value of market value method and afforestation cost method),and evaluated the value of forest carbon sink.The results showed: that in 2009 and 2019,the forest carbon storage in DangYang was 98.20×10^(4)tC and 147.42×10^(4)tC respectively;the average carbon density was 14.27 tC·hm^(-2)and 22.23 tC·hm^(-2)(including the aboveground and excluding dead wood, litter and soil organic carbon).From 2009 to 2019,in 10 years the forest carbon sink in DangYang was 180.47×10^(4)tCO_(2)(49.22×10^(4)tC),and the annual carbon sink per unit area was 2.93tCO_(2)·hm^(-2)·a^(-1)(0.8tC·hm^(-2)·a^(-1));2009 to 2019,during the 10 year period, the value of forest carbon sink in DangYang reached 100 million yuan, and the annual carbon sink value per unit area was 162.32 yuan·hm^(-2)·a^(-1).