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

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 NH sub(4)-N and dissolved organics. Although the acetylene reduction activity (ARA...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 1999-04, Vol.111 (1/4), p.29-40
Main Authors: Chan, Y.S.G, Wong, M.H, Whitton, B.A
Format: Article
Language:English
Subjects:
Acacia confusa
acetylene
Agronomy. Soil science and plant productions
Biological and medical sciences
Biomass
biomass production
carbon dioxide
Cinnamomum
Cinnamomum parthenoxylon
Economic plant physiology
Fundamental and applied biological sciences. Psychology
gas exchange
inhibition
Land fill
landfill leachates
Leucaena leucocephala
nitrogen content
Nitrogen fixation
nutrient content
Parasitism and symbiosis
phosphorus
photosynthesis
phytotoxicity
Plant physiology and development
Plants (botany)
potassium
reduction
respiration
Rhizobium
root nodules
seedlings
Soils
species differences
Symbiosis
Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
Tristania conferta
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Summary: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 NH sub(4)-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.
ISSN:0049-6979
1573-2932
DOI:10.1023/a:1005088919668