深圳市森林碳储量及其动态变化

Forest Carbon Storage and Its Dynamic Change in Shenzhen City

根据深圳市2005年和2010年森林资源二类调查数据(更新)资料,采用生物量转换因子连续函数法,对深圳市森林的碳储量、碳密度及其动态变化进行分析。结果表明:深圳市2010年森林生物量碳储量223.95×104Mg,碳密度28.21 Mg/hm2,分别比2005年增加22.57×104Mg和2.18Mg/hm2,碳储量年增长1.81%;乔木林生物量碳储量由2005年的139.29×104Mg增加到2010年的161.86×104Mg,年均增长3.24%,碳密度由29.32 Mg/hm2增加到32.17 Mg/hm2;2010年乔木林生态系统碳储量638.96×104Mg,其中土壤碳储量占74.64%,乔木层碳储量占19.25%,森林下层植被和枯落物碳储量分别占3.48%和2.62%;乔木林生态系统碳密度126.87 Mg/hm2。深圳市乔木林以幼中龄林为主,固碳潜力可达66.20×104Mg。

Based on the data collected and updated in the 2^nd class forest resource inventory of 2005 and 2010 in Shenzhen City, the carbon storage, carbon density and its dynamic change of the forest resource in Shenzhen City between 2005 and 2010 were estimated and analyzed by adopting the successive function method with biomass variable as transfer factor. The analyses indicated that the biomass carbon storage of the forest ecosystem in Shenzhen City in the year of 2010 was 223.95× 104 Mg and whose carbon density at the same time was 28.21 Mg/hm2, which was respectively increased by 22.57 × 104 Mg and 2. 18 Mg/hm2 on the basis of 2005, and the an- nual growth rate of biomass carbon storage was 1.81%. The biomass carbon storage of arbor tree species forest was increased from 139.29× 104 Mg in 2005 to 161.86 ×104 Mg in 2010 with an annual growth rate of 3.24%, and its carbon density was increased from 29.32 Mg/hm2 in 2005 to 32. 17 Mg/hm2 in 2010. The carbon storage of arbor tree species forest ecosystem in 2010 was 638.96 × 104 Mg, in which the carbon storage in the woodland soil ac- counted for 74. 64%, and the carbon storage of arbor layer, undergrowth vegetation and forest litters accounted for 19.25%, 3.48 % and 2.62 %, respectively. The carbon density of arbor forest ecosystem in 2010 was 126. 87 Mg/hm2. The arbor tree species forest in Shenzhen City was mainly composed of young and middle-aged plants, whose potential for carbon storage might reach to 66.20 ×104 Mg in the future.