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Dump Stability and Soil Fertility of a Coal Mine Spoil in Indian Dry Tropical Environment: A Long-Term Study

Author

Listed:
  • Nimisha Tripathi

    (Central Institute of Mining and Fuel Research
    University of South Australia)

  • Raj Shekhar Singh

    (Central Institute of Mining and Fuel Research)

  • Swadesh K. Chaulya

    (Central Institute of Mining and Fuel Research)

Abstract

Plant available nitrogen, belowground (root) biomass, soil nitrogen (N) mineralization and microbial biomass N (MBN) were studied for 12 years at the interval of 2 years (0, 2, 4, 6, 8, 10 and 12 years) and mine dump stability at the intervals of 6 years (0, 6 and 12 years) after re-vegetation on coal mine spoil site. Plant available nitrogen in revegetated mine spoil ranged from 4.51 to 6.59 μg g−1, net N-mineralization from 1.87 to 13.85 μg g−1 month−1, MBN from 10 to 22.63 μg g−1, and root biomass from 28 to 566 g−2. Mining activity has caused a change in soil characteristics including plant available nutrients like nitrate-N, ammonium-N and phosphate-P by 70, 67, and 76 %, respectively, N-mineralization by 93 %, root biomass values by 97 % and MBN values by 91 % compared to forest ecosystems. Revegetation of mine spoil produced increase in root biomass values by 1.3, 7.6 and 17.2 times, mineral N values by 1.22, 1.43 and 1.79 times, N-mineralization values by 1.8, 5.2 and 12.6 times and MBN values by 1.6, 2.0, and 3.4 times in 2, 6 and 12 years, respectively. Below ground biomass was highly co-related with microbial biomass and plant available nutrients. N-mineralization, plant available nutrients and the clay content were positively correlated with age of revegetation (P

Suggested Citation

  • Nimisha Tripathi & Raj Shekhar Singh & Swadesh K. Chaulya, 2012. "Dump Stability and Soil Fertility of a Coal Mine Spoil in Indian Dry Tropical Environment: A Long-Term Study," Environmental Management, Springer, vol. 50(4), pages 695-706, October.
    • Handle: RePEc:spr:envman:v:50:y:2012:i:4:d:10.1007_s00267-012-9908-4
    DOI: 10.1007/s00267-012-9908-4
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