Abstract：
:Development of secondary forest as post-mining land use in the surface coal mining degraded sites is of high research interest due to its potential to sequester atmospheric carbon (C). The objectives of this study were to assess the improvement in mine soil quality and C sequestration potential of the post-mining reclaimed land with time. Hence, this study was conducted in reclaimed chronosequence sites (young, intermediate and old) of a large open cast coal project (Central Coal Fields Limited, Jharkhand, India) and results were compared to a reference forest site (Sal forest, Shorea robusta). Mine soil quality was assessed in terms of accretion of soil organic carbon (SOC), available nitrogen (N) and soil CO2 flux along with the age of revegetation. After 14 years of revegetation, SOC and N concentrations increased three and five-fold, respectively and found equivalent to the reference site. Accretion of SOC stock was estimated to be 1.9 Mg C ha-1year-1. Total ecosystem C sequestered after 2-14 years of revegetation increased from 8 Mg C ha-1 to 90 Mg C ha-1 (30-333 Mg CO2 ha-1) with an average rate of 6.4 Mg C ha-1year-1. Above ground biomass contributes maximum C sequestrate (50%) in revegetated site. CO2 flux increased with age of revegetation and found 11, 33 and 42 Mg CO2 ha-1year-1 in younger, intermediate and older dumps, respectively. Soil respiration in revegetated site is more influenced by the temperature than soil moisture. Results of the study also showed that trees like, Dalbergia sissoo and Heterophragma adenophyllum should be preferred for revegetation of mine degraded sites.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Ahirwal J,Maiti SKdoi
10.1016/j.jenvman.2017.07.003subject
Has Abstractpub_date
2017-10-01 00:00:00pages
369-377eissn
0301-4797issn
1095-8630pii
S0301-4797(17)30669-2journal_volume
201pub_type
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