深圳市经济林生物量与碳储量及其空间分布

Biomass and Carbon Storage and Their Spatial Distribution of Economic Forest in Shenzhen City

基于2013年深圳市森林资源二类调查的更新数据,在样地调查和平均木生物量、含碳率、土壤有机碳含量测定基础上,对深圳市经济林生物量和碳储量进行测算。结果表明,2013年深圳市经济林生物量103.66×104t,其中植被生物量94.74×104t,枯落物生物量8.92×104t;总碳储量232.31×104t,其中土壤碳储量、植被碳储量和枯落物碳储量分别占总碳储量的78.25%、19.79%和1.96%;荔枝林碳储量占经济林总碳储量的92.26%。在空间分布上,宝安区的经济林生物量和碳储量最高,分别为41.54×104t和94.07×104t,其余依次为龙岗区(41.14×104t,91.68×104t)、南山区(16.49×104t,36.70×104t)、罗湖区(1.95×104t,4.34×104t)、福田区(1.59×104t,3.54×104t)和盐田区(0.94×104t,1.99×104t)。经济林生态系统碳密度104.17 t/hm2,其中植被碳密度20.62 t/hm2,枯落物碳密度2.03 t/hm2,土壤碳密度81.52 t/hm2。深圳市经济林生态系统碳密度较低,固碳潜力大。

Based on the data of 2013 forest resource inventory in Shenzhen City, the biomass and carbon storage of economic forest are estimated by sample-plot survey and determination of the biomass and carbon content of average sample trees and soil organic carbon content. The total biomass of economic forest in Shenzhen City in 2013 is 103.66 ×10^4 t, of which the vegetation biomass is 94.74 ×10^4 t and the litter biomass is 8.92 ×10^4 t. The total carbon storage is 232.31 ×10^4 t, of which the carbon storage of soil, vegetation and litter account for 78.25 % , 19.79 % and 1.96 % , respectively. The carbon storage of litchi forest accounts for 92.26 % of the total. In spatial distribution patterns, the maximum of biomass and carbon storage take place in Bao＇ an District （ 41.54 ×10^4 t , 94.07 ×10^4 t） , followed by Longgang District （41.14 ×10^4 t, 91.68 ×10^4 t） , Nanshan District （ 16. 49 ×10^4 t, 36. 70 ×10^4 t）, Luohu District （1.95 ×10^4 t, 4. 34 ×10^4 t） , Futian District （1.59 ×10^4 t, 3.54 ×10^4 t） and Yan- tian District （0. 94 ×10^4 t, 1.99 ×10^4 t）. The carbon density of economic forest ecosystem is 104. 17 t/hm2, while that of vegetation, litter and soil is 20. 62 t/hm2, 2. 03 t/hm2 and 81.52 t/hm2, respectively. The carbon density of economic forest ecosystem is low and there is great potential for carbon sequestration in Shenzhen City.