Effects of fly ash on soil microbial activity

Ming Hung WONG, J.W.C. WONG

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Fly ash was added to a sandy soil and a sandy loam to study its effects on soil microbial respiration. Microbial respiration was reduced with increasing fly ash treatments in the sandy soil, whereas in the sandy loam, a significant depression was only recorded at the highest ash addition for both total and cumulative carbon dioxide evolved. Total carbon dioxide release was actually increased by 3% and 6% ash amendment on the sandy loam. A highly negative correlation was found between respiration and ash treatment for the sandy soil (r = −0·9904, p < 0·005), but not for the sandy loam. Ecological dose 50% (EcD₅₀) values of the sandy soil were smaller than that of the sandy loam for each period. The reasons for this are discussed. Copyright © 1986 Published by Elsevier Ltd.
Original languageEnglish
Pages (from-to)127-144
JournalEnvironmental Pollution Series A: Ecological and Biological
Issue number2
Publication statusPublished - 1986


Wong, M. H., & Wong, J. W. C. (1986). Effects of fly ash on soil microbial activity. Environmental Pollution Series A: Ecological and Biological, 40(2), 127-144. doi: 10.1016/0143-1471(86)90080-2


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