Effects of landfill leachate on growth and nitrogen fixation of two leguminous trees (Acacia confusa, Leucaena leucocephala)

Yuk Sing Gilbert Chan, M. H. Wong, B. A. Whitton

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


The influence of landfill leachate on the rhizobia-legume systems of Acacia confusa and Leucaena leucocephala was assayed for five months with a serial dilution (73-0.58%) of leachate which had a high concentration of NH4-N and dissolved organics. Although the acetylene reduction activity (ARA) of the nodules was suppressed by the leachate, the harvestable biomass of inoculated seedlings was higher than rhizobia-free seedlings. The total N content in rhizobia-free seedlings was higher than that for inoculated seedlings, indicating that the legumes accumulated more N from leachate- irrigated soil when they were not inoculated. Their performance was compared with that of two non-legumes (Cinnamomum parthenoxylon, Tristania conferta). These two non-legumes tolerated the highest concentration of leachate for only one month and then started to wilt. The total N contents of their tissue were less than those of the two legumes.
Original languageEnglish
Pages (from-to)29-40
Number of pages12
JournalWater, Air, and Soil Pollution
Issue number1-4
Publication statusPublished - 1 Apr 1999


  • Acacia confusa
  • Landfill leachate
  • Legume
  • Leucaena leucocephala
  • Nitrogen addition
  • Nitrogen fixation

ASJC Scopus subject areas

  • Atmospheric Science
  • Pollution
  • Environmental Science(all)
  • Environmental Chemistry
  • Water Science and Technology
  • Earth-Surface Processes

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