T-Stor
 

T-Stor >
Irish Journal of Agricultural & Food Research >
IJAFR, Volume 50, no. 2, 2011 >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/63

Title: Relationship between live weight and body condition score in Irish Holstein-Friesian dairy cows
Authors: Berry, Donagh P.
Buckley, Frank
Dillon, Pat
Keywords: Body condition score
Calving interval
Live weight
Parity
Issue Date: 2011
Publisher: Teagasc (Agriculture and Food Development Authority), Ireland
Citation: Relationship between live weight and body condition score in Irish Holstein-Friesian dairy cows. D.P. Berry, F. Buckley and P. Dillon. IJAFR Vol. 50, No. 2 (2011) pp. 141-147
Series/Report no.: Irish Journal of Agricultural and Food Research;Volume 50: Number 2, 2011
Abstract: The objective of this study was to quantify the change in live weight (LWT) per unit change in body condition score (BCS) for Irish Holstein-Friesian dairy cows. Mixed model analyses were performed on 82 948 test-day records of BCS and LWT across 11 075 lactations from 7391 cows, representing 62 commercial and 4 research herds, during the years 1999 and 2000. Factors included in the mixed models were parity, stage of the inter-calving interval and the three-way interaction between herd, year and fortnight of the calendar year at calving. Interactions between the effect of BCS and either parity or stage of the inter-calving interval were included in some models to evaluate the effect of these factors on the relationship between LWT and BCS. A moderate correlation (0.49) existed between BCS and LWT in the complete dataset, but it differed significantly with parity and stage of the inter-calving interval (range 0.36 to 0.59). Analysis of the entire dataset yielded an estimate of 50 kg LWT change per unit change in BCS and this coefficient ranged from 39 kg to 66 kg, depending on parity or the stage of the inter-calving interval. Accurate values of LWT per unit BCS are important input parameters for animal or herd-level biological models designed to evaluate the energy demands of the animal or herd.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/63
ISSN: 0791-6833
Appears in Collections:IJAFR, Volume 50, no. 2, 2011
Animal & Bioscience

Files in This Item:

File Description SizeFormat
Vol. 50 No. 2 pp 141-147.pdf73.51 kBAdobe PDFView/Open

This item is protected by original copyright


View Statistics

Items in T-Stor are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! Teagasc - The Agriculture and Food Development Authority  2012  - Feedback