SHORT COMMUNICATION
Development of models to estimate milk urea
nitrogen concentrations
1
Brazilian Institute of Geography and Statistics/IBGE, Brazil
2
Agricultural College “Luiz de Queiroz”, University of Sao Paulo/USP, Brazil
3
Brazilian Centre of Agriculture and Animal Research/EMBRAPA - Suinos e Aves, Brazil
4
Veterinary College, Federal University of Goias/UFG, Brazil
5
Veterinary Medicine and Animal Science College, University of Sao Paulo/USP, Brazil
Publication date: 2004-08-30
J. Anim. Feed Sci. 2004;13(Suppl. 1):527-530
KEYWORDS
ABSTRACT
This study aimed to estimate milk urea nitrogen (MUN) as a function of days in milk (DIM),
lactation number (LN) and calving season. In the study, 7.006 observations were used. Milk production
(kg), DIM and LN were collected on the milk sampling days. Calving seasons (CS) were divided into
summer and winter. A model to describe the lactation curve was used to estimate MUN, adding LN and
CS to it and verifying the coincidence among curves. Concentrations of MUN showed similar pattern
to the lactation curve and differed among 1st, 2nd, 3rd and 4th-5th lactation, being influenced by CS.
CITATIONS (2):
1.
Effect of beta-lactoglobulin polymorphism and seasonality on bovine milk composition
Bruno G Botaro, Ygor V R Lima, Adriana A Aquino, Raquel H R Fernandes, José F Garcia, Marcos V Santos
Journal of Dairy Research
Bruno G Botaro, Ygor V R Lima, Adriana A Aquino, Raquel H R Fernandes, José F Garcia, Marcos V Santos
Journal of Dairy Research
2.
Effects of dietary urea levels on milk protein fractions of Holstein cows
A.A. Aquino, Y.V.R. Lima, B.G. Botaro, C.S.S. Alberto, K.C. Peixoto, M.V. Santos
Animal Feed Science and Technology
A.A. Aquino, Y.V.R. Lima, B.G. Botaro, C.S.S. Alberto, K.C. Peixoto, M.V. Santos
Animal Feed Science and Technology
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