Carbon storage and sequestration potential of five typical plantation ecosystems in Gansu Province, China

doi:10.13287/j.1001-9332.201704.022

Abstract

Abstract: Based on the data of the field investigation and laboratory and the database of the 8^th national forestry inventory, ecosystem carbon density, storage amount, and sequestration potential of tree layer were estimated for five typical plantation ecosystems (Robinia pseudoacacia, Populus spp., Pinus tabuliformis & Pinus armandii, which were grouped as one kind of ecosystems, Larix principis-rupprechtii, and Picea asperata) in Gansu Province. The results showed that the average carbon density and total carbon storage of the five typical plantation ecosystems were 139.65 t·hm^-2 and 85.78 Tg, respectively. Ecosystem carbon density varied among ecosystems. It followed the sequence of premature (250.70 t·hm^-2) > mature (175.97 t·hm^-2) > middle-aged (156.92 t·hm^-2) > young (117.56 t·hm^-2) forest. Meanwhile, carbon storage in these plantations ranked in the order of young (45.47 Tg) > middle-aged (19.54 Tg) > mature (11.84 Tg) > pre-mature (8.93 Tg) forest. Specifically, young and middle-aged plantations contributed the most and accounted for 75.9% of the total carbon storage. The realistic carbon sequestration potential (CP_r) by tree layer of the five typical plantation ecosystems in Gansu Province was estimated as 7.27 Tg. The two largest contributors toCP_r were R. pseudoacacia (2.49 Tg) and Populus spp. (2.10 Tg). Young plantations (3.78 Tg) showed the largest CP_r, followed by middle-aged plantations (2.04 Tg), and the value of premature plantations (0.45 Tg) was the smallest. The maximum carbon sequestration potential (CP_max) might be up to 27.55 Tg, the CP_max with different plantations ranked in the order of R. pseudoacacia (9.42 Tg)> L. principis-rupprechtii (6.22 Tg) ≈ P. asperata (6.36 Tg) > Populus spp. (3.18 Tg) >P. tabuliformis & P. armandii (2.37 Tg). The CP_max of young and middle-aged plantations was estimated as 18.48 and 6.89 Tg, respectively, which accounted for 92% of the total maximum carbon sequestration potential.

CHENG Ran-ran, GUAN Jin-hong, ZHANG Jian-guo, HE Qiu-yue, DENG Lei, HOU Hao, LI Guo-qing, DU Sheng. Carbon storage and sequestration potential of five typical plantation ecosystems in Gansu Province, China[J]. Chinese Journal of Applied Ecology, 2017, 28(4): 1112-1120.

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