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Reclaimed mined lands provide an excellent opportunity to sequester carbon and combat global warming. Carbon sequestration on reclaimed sites depend on age of reclamation, composition of species, geomining conditions (soil characteristics) and prevailing climate. The aims of the present study were to calculate carbon (C)—stock of biomass of 4 years old plantation (dominated by Albizia lebbeck, Dalbergia sissoo and Bambusa arundinacea), understorey vegetation and litter, soil organic carbon in reclaimed minesoil (RMS) and compare with reference forest site. Allometric equation was used for the estimation of biomass C stock and found 13.0 Mg C ha−1 (A lebbeck 7.8 Mg C ha−1, D sissoo 3.5 Mg C ha−1 and B. arundincea 1.2 Mg C ha−1), while stock of understorey vegetation was 0.98 Mg C ha−1. In RMS, C stock was 16.3 Mg C ha−1, out of which inorganic C contributed 1.7 g kg−1 (8 % of total soil C), Coal C 8.7 g kg−1 (43 % of total soil C) and biogenic C 9.8 g kg−1 (49 % of total soil C). Total C stock in reclaimed site was calculated as 30.3 Mg C ha−1 (equivalent to 111 Mg CO2 ha−1). The study concluded that (i) coal C is responsible for overestimation of C stock in RMS (ii) Maximun C stock stored in aboveground biomass component and (iii) reclaimed mined lands will take approximately 17 years to reach the level of C stock of reference forest site in dry tropical climate.

international journal of coal science and technology/international journal of coal science and technology

Estimation of carbon sequestration in reclaimed coalmine degraded land dominated by Albizia lebbeck, Dalbergia sissoo and Bambusa arundinacea plantation: a case study from Jharia Coalfields, India