Short-term responses of two contrasting species of earthworms in an agricultural soil amended with coal fly-ash

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Show simple item record Muir, MA Yunusa, IAM Burchett, MD Lawrie, R Chan, KY Manoharan, V 2009-12-21T02:29:24Z 2007-05
dc.identifier.citation Soil Biology and Biochemistry, 2007, 39 (5), pp. 987 - 992
dc.identifier.issn 0038-0717
dc.identifier.other C1 en_US
dc.description.abstract With the renewed interest in the use of coal fly-ash for amendment of agricultural soils in Australia, we assessed how earthworms, as indicators of soil health, responded to this ameliorant. We assessed survival, weight, burrowing and elemental concentrations for earthworms of a native unnamed Megascolecid species and of exotic Aporrectodea trapezoides in intact soil cores treated with an alkaline fly-ash at rates equivalent to 0, 5 and 25 t/ha over 6 weeks. Fly-ash did not affect survival, growth, number of burrows created or phosphorus solubilisation. Transfer of the earthworms to the new environment having vastly different pH from where they were collected, and possibly overcrowding, caused mortality in the soil cores for all treatments. A. trapezoides that had smaller individuals suffered mortality of 12% compared with 23% for the larger earthworms of Megascolecids. Earthworms of Megascolecids each increased their weight by 0.24g (25% of their original weight) while those of A. trapezoides lost 0.18g each (21% of their original weight). The difference in growth between the two earthworms was associated with grazing habit and probably with the large difference in the pH between source soil and that of the core soil. Megascolecids appeared to minimize grazing on ash-tainted soil and so ingested less Zn, which was more abundant in the fly-ash than in the soil, compared with A. trapezoides that had elevated concentration of this metal. Extractable P in the soil was increased with both species of earthworms, more so with the exotic species that solubilized 11% more P than the native Megascolecids. The benign influence of fly-ash on survival and growth of worms was associated with the pH of soil remaining unchanged during the six weeks of incubation. © 2006 Elsevier Ltd. All rights reserved.
dc.language eng
dc.relation.isbasedon 10.1016/j.soilbio.2006.10.006
dc.title Short-term responses of two contrasting species of earthworms in an agricultural soil amended with coal fly-ash
dc.type Journal Article
dc.description.version Published
dc.parent Soil Biology and Biochemistry
dc.journal.volume 5
dc.journal.volume 39
dc.journal.number 5 en_US
dc.publocation United Kingdom en_US
dc.identifier.startpage 987 en_US
dc.identifier.endpage 992 en_US DVCRch.Institute for Water & Environmental Resource Mgmnt en_US
dc.conference Verified OK en_US
dc.for 0602 Ecology
dc.personcode 101663
dc.personcode 030005
dc.personcode 995955
dc.personcode 107130
dc.percentage 100 en_US Ecology en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Earthworm casts
dc.description.keywords Extractable phosphorus
dc.description.keywords Heavy metals
dc.description.keywords Soil amendment
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history Uncategorised (ID: 363)
utslib.collection.history Closed (ID: 3)
utslib.collection.history Closed (ID: 3)

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