Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/7626
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dc.contributor.authorIslam, Afm Fen
dc.contributor.authorBurgess, Susanen
dc.contributor.authorEasey, Pen
dc.contributor.authorWells, Ben
dc.contributor.authorWalkden-Brown, Steve Wen
dc.date.accessioned2011-06-03T10:18:00Z-
dc.date.issued2010-
dc.identifier.citationProceedings of the Australian Society of Animal Production 28th Biennial Conference, v.28, p. 107-107en
dc.identifier.urihttps://hdl.handle.net/1959.11/7626-
dc.description.abstractMeat chickens in Australia are mostly reared on fresh litter materials such as wood shavings. Such materials are becoming increasingly unavailable and expensive. Reuse of litter for raising multiple batches of chickens is an option used in many countries despite the risk of pathogen carryover and compromised productivity. The small number of Australian growers who reuse litter (East 2007) use composting by heaping or windrowing of litter in sheds between batches of chickens to of inactivating pathogens and improving the physical condition due to the heat generated. As part of a larger study investigating pathogen inactivation following heaping and windrowing of broiler litter we measured the temperature profile at various depths in heaps and windrows over 9-10 days and also assessed changes in litter dry matter, pH and chemical content in two experiments on commercial broiler farms. Expt. 1, on a Sydney farm, compared windrowed (Win), heaped (H) and heaped litter with mechanical turning on day 3 (HT) over 9 days. Expt. 2, on a Brisbane farm, compared windrowed litter (Win) and the same mechanically turned at day 4 (WT) with no heaping (NH) in which litter was undisturbed "in situ" apart from mechanical ripping at day 4, over 10 days. Temperature was recorded at 15-minute intervals using iButton data loggers at the various depths. Representative litter samples were collected at 4 times for determination of pH, dry matter, nitrogen, potassium and carbon contents. In expt. 1 H had higher mean temp than Win (P<0.05) due to more sustained heating (Fig. 1a). In expt. 2 the NH treatment did not result in any heating with temperatures below 30°C throughout, while the Win produced similar temperature profiles to that seen in Expt. 1. In Expt. 2 turning had no effect on temperature while in Expt. 1 it increased after turning by 2-4°C. Depth within the heap had profound effects on the temperature profile (Fig. 1b) with surface temperatures remaining around 30°C and unlikely to induce significant pathogen inactivation. Litter dry matter increased with time post heaping/windrowing from ~74% to ~77%. Litter had an alkaline pH (~8.6) which declined with time in heaped/windrowed litter (by 0.2-0.4) over 9-10 days. There was a significant positive association between the dry matter content and litter pH (R²=0.33, P<0.001). ... Sustained temperatures above 50°C were achieved during litter heaping and windrowing with high temperatures persisting for the duration of measurement. These temperatures are likely to induced significant inactivation of poultry pathogens, and indeed this was observed in these experiments (Islam et al., 2010).en
dc.languageenen
dc.publisherAustralian Society of Animal Production (ASAP)en
dc.relation.ispartofProceedings of the Australian Society of Animal Production 28th Biennial Conferenceen
dc.titleTemperature, pH and Chemical Composition of Broiler Litter During Partial Compostingen
dc.typeConference Publicationen
dc.relation.conferenceASAP 2010: 28th Biennial Australian Society of Animal Production Conference - Livestock Production in a Changing Environmenten
dc.subject.keywordsAnimal Managementen
dc.subject.keywordsAnimal Productionen
dc.subject.keywordsAnimal Protection (Pests and Pathogens)en
local.contributor.firstnameAfm Fen
local.contributor.firstnameSusanen
local.contributor.firstnamePen
local.contributor.firstnameBen
local.contributor.firstnameSteve Wen
local.subject.for2008070205 Animal Protection (Pests and Pathogens)en
local.subject.for2008070203 Animal Managementen
local.subject.for2008070299 Animal Production not elsewhere classifieden
local.subject.seo2008830309 Poultryen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Scienceen
local.profile.schoolAnimal Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailfislam2@une.edu.auen
local.profile.emailsburgess@une.edu.auen
local.profile.emailswalkden@une.edu.auen
local.output.categoryE3en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20110221-154540en
local.date.conference11th - 15th July, 2010en
local.conference.placeArmidale, Australiaen
local.publisher.placeRoseworthy, Australiaen
local.format.startpage107en
local.format.endpage107en
local.identifier.volume28en
local.contributor.lastnameIslamen
local.contributor.lastnameBurgessen
local.contributor.lastnameEaseyen
local.contributor.lastnameWellsen
local.contributor.lastnameWalkden-Brownen
dc.identifier.staffune-id:fislam2en
dc.identifier.staffune-id:sburgessen
dc.identifier.staffune-id:swalkdenen
local.profile.orcid0000-0002-0638-5533en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:7796en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleTemperature, pH and Chemical Composition of Broiler Litter During Partial Compostingen
local.output.categorydescriptionE3 Extract of Scholarly Conference Publicationen
local.relation.urlhttp://www.asap.asn.au/asap28/proceedings28.htmlen
local.relation.urlhttp://www.asap.asn.au/asap28/files/islam107.pdfen
local.conference.detailsASAP 2010: 28th Biennial Australian Society of Animal Production Conference - Livestock Production in a Changing Environment, Armidale, Australia, 11th - 15th July, 2010en
local.search.authorIslam, Afm Fen
local.search.authorBurgess, Susanen
local.search.authorEasey, Pen
local.search.authorWells, Ben
local.search.authorWalkden-Brown, Steve Wen
local.uneassociationUnknownen
local.year.published2010-
local.date.start2010-07-11-
local.date.end2010-07-15-
local.profile.affiliationtypeUnknownen
local.profile.affiliationtypeUnknownen
local.profile.affiliationtypeUnknownen
local.profile.affiliationtypeUnknownen
local.profile.affiliationtypeUnknownen
Appears in Collections:Conference Publication
School of Environmental and Rural Science
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