Rumen Development of Artificially-Reared Lambs Exposed to Three Different Rearing Regimens.

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dc.citation.issue12
dc.citation.volume11
dc.contributor.authorHerath HMGP
dc.contributor.authorPain SJ
dc.contributor.authorKenyon PR
dc.contributor.authorBlair HT
dc.contributor.authorMorel PCH
dc.date.available2021-12
dc.date.available2021-12-15
dc.date.issued20/12/2021
dc.description(c) The Author/s
dc.description.abstractThe objective of this study was to examine the effect of three different rearing regimens on rumen development in lambs reared artificially. Romney ram lambs were randomly allocated to one of three treatments: commercial milk replacer fed to 57 d of age and high fibre concentrate pellets (HFP57); commercial milk replacer, high fibre concentrate pellets, and early weaning from milk replacer at 42 d of age (HFP42); high protein milk replacer from 2-16 d of age followed by commercial milk replacer, low fibre concentrate pellets, and early weaning from milk replacer at 42 d of age (LFP42). Lambs were slaughtered at 57 d of age. Volatile fatty acid content in rumen fluid at slaughter was analysed and rumen tissue samples were collected for histological examination. The rumen n-butyric content was greater (p < 0.05) in both LFP42 and HFP42 treatment lambs compared to HFP57 lambs. The n-valeric content was greater (p < 0.05) in LFP42 lambs compared to both HFP57 and HFP42 treatment lambs. Thickness of the rumen dorsal wall determined by ultrasound scanning at 49 d was greater (p < 0.05) in both HFP42 and LFP42 lambs compared to HFP57 lambs. There was an interaction (p < 0.05) between treatment and site of rumen tissue sampling on papillae width, density, and rumen muscular layer thickness. Collectively, early weaning and the provision of a low fibre pellet leads to improved rumen function and physical development.
dc.description.publication-statusPublished
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000735296400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fef
dc.identifierARTN 3606
dc.identifier.citationANIMALS, 2021, 11 (12)
dc.identifier.doi10.3390/ani11123606
dc.identifier.elements-id450202
dc.identifier.harvestedMassey_Dark
dc.identifier.issn2076-2615
dc.identifier.urihttps://hdl.handle.net/10179/17808
dc.relation.isPartOfANIMALS
dc.subjectmilk replacer
dc.subjectneutral detergent fibre
dc.subjectpapillae development
dc.subjectpellet composition
dc.subjectrumen site
dc.subjectultrasound scan
dc.subjectvolatile fatty acids
dc.subjectage at weaning
dc.subject.anzsrc0502 Environmental Science and Management
dc.subject.anzsrc0608 Zoology
dc.subject.anzsrc0702 Animal Production
dc.titleRumen Development of Artificially-Reared Lambs Exposed to Three Different Rearing Regimens.
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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