Effects of fly ash on soil microbial activity

M. H. Wong*, Jonathan W C Wong

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

111 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)127-144
Number of pages18
JournalEnvironmental Pollution. Series A, Ecological and Biological
Issue number2
Publication statusPublished - Jan 1986

Scopus Subject Areas

  • Environmental Science(all)
  • Pollution
  • Earth and Planetary Sciences(all)


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