Measurement of 15-N-dilution in nitrogen-fixing leguminous host-plants grown in heavy metal-contaminated soils amended with sewage sludge.

Obbard, J. P. and Jones, Kevin C. (2001) Measurement of 15-N-dilution in nitrogen-fixing leguminous host-plants grown in heavy metal-contaminated soils amended with sewage sludge. Environmental Pollution, 111 (2). pp. 311-320. ISSN 0269-7491

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Abstract

Rates of nitrogen fixation by Rhizobium in symbiosis with leguminous host-plants including white clover, broad bean and peas have been established in soils that have been amended experimentally with heavy metal-contaminated sewage sludges. Results from 15N-dilution experiments for the measurement of N2 fixation have shown that adverse heavy metal effects are apparent on symbiotic N2 fixation rates for white clover grown in inter-specific competition with ryegrass under mixed sward conditions, compared to white clover grown in pure sward. Further experiments on broad bean and pea indicated a significant, but minor-inhibitory metal-related effect on the rate of N2 fixation compared to untreated soils and soils amended with a relatively uncontaminated sludge. The implications of the results with respect to sludge utilisation in agriculture are discussed.

Item Type:
Journal Article
Journal or Publication Title:
Environmental Pollution
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/ge
Subjects:
ID Code:
21567
Deposited By:
Deposited On:
21 Jan 2009 15:21
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 06:23