Acid drainage from coal mining: Effect on paddy soil and productivity of rice

A - Papers appearing in refereed journals

Choudhury, B. U., Malang, A., Webster, R., Mohapatra, K. P., Verma, B. C., Kumar, M., Das, A., Islam, M. and Hazarika, S. 2017. Acid drainage from coal mining: Effect on paddy soil and productivity of rice. Science of the Total Environment. 583 (1 April), pp. 344-351.

AuthorsChoudhury, B. U., Malang, A., Webster, R., Mohapatra, K. P., Verma, B. C., Kumar, M., Das, A., Islam, M. and Hazarika, S.
Abstract

Overburden and acid drainage from coal mining is transforming productive agricultural lands to unproductive wasteland in some parts of Northeast India. We have investigated the adverse effects of acid mine drainage on the soil of rice paddy and productivity by comparing them with non-mined land and abandoned paddy fields of Jaintia Hills in Northeast India. Pot experiments with a local rice cultivar (Myngoi) as test crop evaluated biological productivity of the contaminated soil. Contamination from overburden and acid mine drainage acidified the soil by 0.5 pH units, increased the exchangeable Al3 + content 2-fold and its saturation on clay complexes by 53%. Available sulfur and extractable heavy metals, namely Fe, Mn and Cu increased several-fold in excess of critical limits, while the availability of phosphorus, potassium and zinc contents diminished by 32–62%. The grain yield of rice was 62% less from fields contaminated with acid mine drainage than from fields that have not suffered. Similarly, the amounts of vegetation, i.e. shoots and roots, in pots filled with soil from fields that received acid mine drainage were 59–68% less than from uncontaminated land (average shoot weight: 7.9 ± 2.12 g pot− 1; average root weight: 3.40 ± 1.15 g pot− 1). Paddy fields recovered some of their productivity 4 years after mining ceased. Step-wise multiple regression analysis affirmed that shoot weight in the pots and grain yield in field were significantly (p < 0.01) and positively influenced by the soil's pH and its contents of K, N and Zn, while concentration of S in excess of threshold limits in contaminated soil significantly (p < 0.01) reduced the weight of shoots in the pots and grain yield in the field.

Year of Publication2017
JournalScience of the Total Environment
Journal citation583 (1 April), pp. 344-351
Digital Object Identifier (DOI)doi:10.1016/j.scitotenv.2017.01.074
Open accessPublished as non-open access
Funder project or codeSustainability
Output statusPublished
Publication dates
Online20 Jan 2017
Publication process dates
Accepted12 Jan 2017
Copyright licensePublisher copyright
PublisherElsevier Science Bv
ISSN0048-9697

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