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Title: Characterising lactation curves in heifers of different breeds first calved in moderatge or low condition / G.J. Sawyer, E.J. Speijers, R.J. Morris and F.J. Coupar.
Author: Australian Society of Animal Production Biennial Conference (20th : 1994 : Perth, W.A.) ; Morris, R. J. ; Sawyer, G. J. ; Coupar, F. J. ; Speijers, E. J.
Series: Animal production in Australia, ; v. 20.
Description: p. 128-131.
Subject: Heifers. ; Cattle feeding. ; Milk production. ; Performance recording. ; Dairy cows. ; Lactation. ; Milk yield. ; Western Australia.
Notes: 2 tables ; 1 fig.
8 ref.
[Uniform title:Animal production in Australia : proceedings of the Australian Society of Animal Production twentieth biennial conference, the University of Western Australia, Perth, Western Australia, July 1994.]
ISBN/ISSN: 07285965;
Type: Journal
Abstract: Milk yields were measured every 6 weeks from 21220 days after calving in either moderate or low conditioned groups of Angus, Angus x Friesian or Simford first-calf heifers for 3 successive years. Day of peak yield, peak yield and total 220 day yield were calculated by fitting 3 published equations to data on each of the breed x year x calving condition combinations. All equations ranked breed and calving conditions combinations similarly for 220 day milk yield, but peak yield and day of peak yield were mo
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