Journal
ECOLOGICAL ENGINEERING
Volume 90, Issue -, Pages 135-140Publisher
ELSEVIER
DOI: 10.1016/j.ecoleng.2016.01.025
Keywords
Inorganic carbon; Labile carbon; Stable carbon; Coal carbon; Reclaimed and unreclaimed coalmine soils; Carbon sequestration
Funding
- Indian School of Mines (ISM), Dhanbad
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Reclaimed mine soils (RMS) provide an excellent opportunity to sequester Carbon (C) both in mine soils and vegetation, as RMS initially lack biogenic C. Soil C in RMS consists of inorganic Carbon (IC), biogenic Carbon (recent C) and geogenic Carbon (coal C). In Indian mining conditions, estimation of C sequestration of RMS sites are difficult due to presence of substantial amount of coal C contributed during mining and reclamation activities, which overestimates the values of C sequestration. Conventional procedures for estimation of soil organic carbon (SOC) cannot distinguish between biogenic and coal C in the RMS. The objective of this study was to find out relative distribution of inorganic, biogenic and coal C fractions in a 10 year old RMS (tree density 1500 ha 1 with average girth of 43-66 cm) along the soil profile (0-10 cm and 10-20 cm) by chemical fractionation methods and compare with unreclaimed site. Inorganic C constitutes 7-10% and 11-19% of total soil carbon (TSC) in RMS site and unreclaimed site, whereas biogenic C constituted 45-66% and 21-25% of TSC in RMS and unreclaimed site, respectively. Both labile and stable C fractions were found higher in RMS site than unreclaimed site. Coal C contributed higher in unreclaimed site (68-55%) than the RMS site (47-24%). The study concluded that estimation of IC, biogenic C and coal C is essential for estimation of C sequestration potential in RMS for the dry tropical climate. (C) 2016 Elsevier B.V. All rights reserved.
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