Coal fly ash and lime stabilized biosolids as an ameliorant for boron deficient acidic soils

R. F. Jiang*, C. G. Yang, D. C. Su, Jonathan W C WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Previous studies have shown that a combination of coal fly ash (10% w/w) and lime (1% w/w) amendment was effective in stabilizing biosolids (ACS) by killing the pathogens and reducing heavy metal availability, and the product contained a high B content. It was, therefore, the aim of the present study to evaluate the suitability of the ACS as a B fertilizer for a degraded acid soil with B deficiency in South China. An acid and B deficient loamy soil was amended with the ACS at application rates of 6.4, 12.7, 25.5, 63.7 and 127.4 mg ha−1, which were then compared to the same soil receiving an equivalent B fertilizer application rates of 0.9, 1.4, 2.2, 4.5 and 8.4 kg ha−1, respectively. Soil hot water soluble B content and pH increased significantly with an increase in the amendment rate of the ACS mixture. Soil amended with the ACS mixture had a significantly higher dry weight yield for both cucumber and corn than the control and its counterparts of soil with B fertilizer. The highest yield was obtained in the treatment with 5% ACS mixture amendment. Boron concentrations in plant tissues increased according to the application rates of the ACS mixture and B fertilizer. Cucumber was more sensitive than corn to both B deficiency and toxicity as indicated by the insignificant effect of B fertilizer application on dry weight yields of corn. The experimental results demonstrated that the ACS mixture at an application rate of ≤ 63.7 mg ha−1 could act as a B fertilizer supplement for the acid loamy soil.

Original languageEnglish
Pages (from-to)645-649
Number of pages5
JournalEnvironmental Technology (United Kingdom)
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Jun 1999

Scopus Subject Areas

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal

User-Defined Keywords

  • Biosolids
  • Boron
  • Coal fly ash
  • Corn
  • Cucumber
  • Lime

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