Landfill leachate as irrigation water for tree and vegetable crops

Ming Hung WONG, C. K. Leung

Research output: Contribution to journalJournal articlepeer-review

41 Citations (Scopus)


The effects of landfill leachate (from Gin Drinker's Bay landfill, Hong Kong) on the growth of tree and vegetable crops were studied in a greenhouse. Higher yields were obtained for Brassica chinensis (Chinese White Cabbage) and B. parachinensis (Flowering Chinese Cabbage) with 5, 10, 20 and 40% leachate dilutions than in the non-leachate control. Yield was reduced for Acacia confusa (Acacia) under all concentrations of leachate treatments. Inhibition of root growth was also observed in the three species with 40% leachate treatment. Leachate-treated soil had elevated levels of electrical conductivity, total-, ammonia) and nitrate-N, exchangeable Na and P. For all heavy metals analysed, only Mn significantly (p < 0.05) accumulated in soil after leachate irrigation. Uptake of N, Na, Fe and Mn was evident for all test species after leachate irrigation. The degree of uptake was positively correlated (p < 0.05) with the leachate concentrations used for irrigation.

Original languageEnglish
Pages (from-to)311-323
Number of pages13
JournalWaste Management and Research
Issue number4
Publication statusPublished - Jan 1989

Scopus Subject Areas

  • Environmental Engineering
  • Pollution

User-Defined Keywords

  • Hong Kong
  • irrigation
  • Landfill leachate
  • trees
  • vegetables


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