Wang Kaibo, Hu Dongfeng, Deng Juan, Shangguan Zhouping, Deng Lei
State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an China.
Environmental Protection Agency of Shaanxi Province Xi'an China.
Ecol Evol. 2018 Jul 3;8(15):7451-7461. doi: 10.1002/ece3.4228. eCollection 2018 Aug.
The Grain for Green Program (GGP) was the most all-embracing program of ecological reconstruction implemented in China. To estimate carbon storages and carbon sequestration potentials of the GGP forests, the study presented in the paper collected data spanning from 1999 to 2010, such as tree species, tree planting area relevant to the GGP, empirical growth curves suitable for different planted tree species in China, as well as wood density (WD), biomass expansion factor (BEF), carbon fraction (CF) of different trees species, and estimated the carbon storages of the biomasses of GGP forests from 1999 to 2050. It showed that the total carbon storage of the biomass of GGP forests was 320.29 Tg upon the GGP completion in 2010; the total carbon sequestration is higher during the early GGP-implementation stage than at the late GGP-implementation stage, and the annual mean carbon sequestration of GGP forests was 26.69 Tg/year. The potential of GGP forests as carbon sink presented an increasing increment. In China, the potential increments of GGP forests as carbon sinks were estimated to be 397.34, 604.00, 725.53, and 808.90 Tg in 2020, 2030, 2040, and 2050, respectively, and the carbon sequestration rates were 1.72, 0.89, 0.52, and 0.36 Mg ha year, respectively, corresponding to 2010s, 2020s, 2030s, and 2040s. Therefore, the GGP forests had bigger carbon sequestration capacities and potentials in China.
退耕还林工程是中国实施的最全面的生态重建工程。为估算退耕还林工程森林的碳储量和碳固存潜力，本文的研究收集了1999年至2010年的数据，如树种、与退耕还林工程相关的造林面积、适用于中国不同造林树种的经验生长曲线，以及木材密度（WD）、生物量扩展因子（BEF）、不同树种的碳含量（CF），并估算了1999年至2050年退耕还林工程森林生物量的碳储量。结果表明，到2010年退耕还林工程完成时，退耕还林工程森林生物量的总碳储量为320.29太克；退耕还林工程实施初期的总碳固存高于后期，退耕还林工程森林的年均碳固存为26.69太克/年。退耕还林工程森林作为碳汇的潜力呈增加趋势。在中国，退耕还林工程森林作为碳汇的潜在增量在2020年、2030年、2040年和2050年分别估计为397.34太克、604.00太克、725.53太克和808.90太克，碳固存率分别为1.72、0.89、0.52和0.36 吨/公顷·年，分别对应2010年代、2020年代、2030年代和2040年代。因此，退耕还林工程森林在中国具有更大的碳固存能力和潜力。
