Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 360340
Title Phenotypic profiles for body weight, body condition score, energy intake, and energy balance across different parities and concentrate feeding levels
Author(s) Berry, D.P.; Veerkamp, R.F.; Dillon, P.
Source Livestock Science 104 (2006)1-2. - ISSN 1871-1413 - p. 1 - 12.
Department(s) LR - Backoffice
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) 1st 3 lactations - dairy-cows - random regression - milk-yield - reproductive-performance - genetic-parameters - holstein cows - live weight - postpartum - cattle
Abstract The objective of this study was to investigate potential differences in lactation profiles for body weight (BW), body condition score (BCS), net energy intake (NEI) and energy balance (EB) across different parities and concentrate feeding levels. Records collected from the research farm in southern Ireland from 1995 to 2002 were analysed using random regression methodology. A total of 27,126 and 8212 records were available for BW and BCS, respectively; 1861 and 1835 records were available for NEI and EB, respectively. Significantly different lactation profiles existed for BW, BCS, NEI and EB across parities one to three. First parity cows were lighter, lost more BCS in early lactation, had lower NEI and were in negative energy balance for longer compared to later parity cows. Average NEI across the first 225 days of lactation was 15.4, 19.5 and 21.0 UFLs/day for first, second and third parity cows, respectively. Energy balance turned positive at days 71, 60 and 73 of lactation for first, second and third parity cows, respectively. Cows on the higher feeding levels were heavier, mobilised less body condition in early lactation and had higher NEI than cows on the lower feeding level. No significant difference in height of the EB profile existed between the cows on the low and high feeding level indicating that the duration and extent of NEB was not influenced by the concentrate feeding levels adopted in this study.
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