Immediate, cumulative and residual effects of short- and long-term low plane of nutrition on milk protein and casein composition

Cowley, F. C., Barber, D. G., Anstis, A. R., Houlihan, A. V. and Poppi, D. P. (2014) Immediate, cumulative and residual effects of short- and long-term low plane of nutrition on milk protein and casein composition. Animal Production Science, 54 9: 1374-1380. doi:10.1071/AN14299


Author Cowley, F. C.
Barber, D. G.
Anstis, A. R.
Houlihan, A. V.
Poppi, D. P.
Title Immediate, cumulative and residual effects of short- and long-term low plane of nutrition on milk protein and casein composition
Journal name Animal Production Science   Check publisher's open access policy
ISSN 1836-0939
1836-5787
Publication date 2014-07-24
Year available 2014
Sub-type Article (original research)
DOI 10.1071/AN14299
Open Access Status
Volume 54
Issue 9
Start page 1374
End page 1380
Total pages 7
Place of publication Clayton, VIC Australia
Publisher C S I R O Publishing
Collection year 2015
Language eng
Formatted abstract
Immediate and residual effects of two lengths of low plane of nutrition (PON) on the synthesis of milk protein and protein fractions were studied at the Mutdapilly Research Station, in south-east Queensland. Thirty-six multiparous Holstein-Friesian cows, between 46 and 102 days in milk (DIM) initially, were used in a completely randomised design experiment with three treatments. All cows were fed on a basal diet of ryegrass pasture (7.0 kg DM/cow.day), barley-sorghum concentrate mix (2.7 kg DM/cow.day) and a canola meal-mineral mix (1.3 kg DM/cow.day). To increase PON, 5.0 kg DM/cow.day supplemental maize and forage sorghum silage was added to the basal diet. The three treatments were (C) high PON (basal diet + supplemental silage); (L9) low PON (basal diet only) for a period of 9 weeks; and (L3) low PON (basal diet only) for a period of 3 weeks. The experiment comprised three periods (1) covariate – high PON, all groups (5 weeks), (2) period of low PON for either 3 weeks (L3) or 9 weeks (L9), and (3) period of high PON (all groups) to assess ability of cows to recover any production lost as a result of treatments (5 weeks). The low PON treatment periods for L3 and L9 were end-aligned so that all treatment groups began Period 3 together. Although there was a significant effect of L9 on yields of milk, protein, fat and lactose, and concentrations of true protein, whey protein and urea, these were not significantly different from L3. There were no residual effects of L3 or L9 on protein concentration or nitrogen distribution after 5 weeks of realimentation. There was no significant effect of low PON for 3 or 9 weeks on casein concentration or composition.
Keyword Underfeeding
Pasture
Silage
Urea
Whey protein
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2015 Collection
 
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Created: Tue, 17 Mar 2015, 12:12:50 EST by Frances Cowley on behalf of School of Agriculture and Food Sciences