Revegetation of lagoon ash using the legume species Acacia auriculiformis and Leucaena leucocephala

K. C. CHEUNG, J. P. K. WONG, Z. Q. ZHANG, J. W. C. WONG, Ming Hung WONG

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56 Citations (Scopus)

Abstract

A greenhouse study was conducted to evaluate the potential use of two legume species, Acacia auriculiformis and Leucaena leucocephala for growth on ameliorated lagoon ash with or without nitrogen (N2)-fixing bacteria inoculation. Even though amendments of 30% (w/w) vermiculite or with sewage sludge compost were added to improve the chemical and physical limitations of lagoon ash, significant suppressions in biomass and plant nutrient content were found with ameliorated lagoon ash in comparison to an agricultural soil. The high proportion of clay-sized (<53 μm) ash particles limited root growth. In addition, heavy metal toxicity was a possible factor contributing to poor seedling growth. Higher plant productivity resulted from the sewage sludge compost-amended lagoon ash than with vermiculite due to a greater contribution of plant nutrients in the compost. Nodulation was inhibited in ameliorated lagoon ash but not in agricultural soil. High pH and electrical conductivity and elevated toxic metals may be important parameters that limit bacterial activity. Both species showed potential to establish on amended lagoon ash, with Acacia auriculiformis being the best adapted. Copyright © 2000 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)75-82
JournalEnvironmental Pollution
Volume109
Issue number1
DOIs
Publication statusPublished - Jul 2000

Citation

Cheung, K. C., Wong, J. P. K., Zhang, Z. Q., Wong, J. W. C., & Wong, M. H. (2000). Revegetation of lagoon ash using the legume species Acacia auriculiformis and Leucaena leucocephala. Environmental Pollution, 109(1), 75-82. doi: 10.1016/S0269-7491(99)00235-3

Keywords

  • Revegetation
  • Lagoon
  • Acacia auriculiformis
  • Leucaena leucephala
  • Legume

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