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Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/350

Title: Association between body condition score and live weight in pasture-based Holstein-Friesian dairy cows
Authors: Berry, Donagh P.
Macdonald, Kevin A.
Penno, John W.
Roche, John R.
Keywords: Body condition score
Live weight
regression
Dairy Cattle
Issue Date: Nov-2006
Publisher: Cambridge University Press: Published for the Institute of Food Research and the Hannah Research Institute
Citation: Donagh P Berry, Kevin A Macdonald, John W Penno and John R Roche (2006). Association between body condition score and live weight in pasture-based Holstein-Friesian dairy cows. Journal of Dairy Research, 73, pp 487-491. doi:10.1017/S0022029906002020. Copyright © Proprietors of Journal of Dairy Research
Series/Report no.: Journal of Dairy Research;vol 73
Abstract: The objective was to quantify the strength of the relationship between body condition score (BCS) and live weight (LW) in pasture-based Holstein-Friesian dairy cattle, and to determine the kg LW per unit BCS. A total of 26021 test-day records with information on both BCS (1–10 scale, where 1 is emaciated and 10 is obese) and LW across 1110 lactations from one research farm were used in the analysis. Correlation and regression analyses were used to determine the degree of association between BCS and LW in different parities, stages of the inter-calving interval and years. Correlations between BCS and LW were relatively consistent, with the mean correlation between BCS and LW across all data of 0·55 implying that differences in BCS explain approximately 30% of the variation in LW. Significantly different regressions of LW on BCS were present within stage of inter-calving interval by parity subclasses. Excluding calving, LW per unit BCS varied from 17 kg (early to mid lactation in parity 1) to 36 kg (early lactation in parity 4 and 5). However, LW per unit BCS was greatest at calving varying from 44 kg in first parity animals to 62 kg in second parity animals. On average, 1 BCS unit equated to 31 kg LW across all data.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/350
http://dx.doi.org/10.1017/S0022029906002020
http://journals.cambridge.org/article_S0022029906002020
ISSN: 1469-7629
Appears in Collections:Animal & Bioscience

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