Assessment of carbon sequestration potential of revegetated coal mine overburden dumps: A chronosequence study from dry tropical climate.

摘要: Abstract Development of secondary forest as post-mining land use in the surface coal mining degraded sites is high research interest due to its potential sequester atmospheric carbon (C). The objectives this study were assess improvement mine soil quality and C sequestration post–mining reclaimed with time. Hence, was conducted chronosequence (young, intermediate old) a large open cast project (Central Coal Fields Limited, Jharkhand, India) results compared reference site (Sal forest, Shorea robusta ). Mine assessed terms accretion organic (SOC), available nitrogen (N) CO 2 flux along age revegetation. After 14 years revegetation, SOC N concentrations increased three five-fold, respectively found equivalent site. Accretion stock estimated be 1.9 Mg C ha −1 year . Total ecosystem sequestered after 2–14 revegetation from 8 Mg C 90 Mg C (30–333 Mg ) an average rate 6.4 Mg C Above ground biomass contributes maximum sequestrate (50%) revegetated 11, 33 42 Mg younger, older dumps, respectively. Soil respiration more influenced by temperature than moisture. Results also showed that trees like, Dalbergia sissoo Heterophragma adenophyllum should preferred for sites.