New functions to estimate 305-days milk production of Gir cows;Novas funções para estimar a produção de leite, em 305 dias de lactação, de vacas da raça Gir

Revista Brasileira de Zootecnia

Volumn 37, Issue 7, 2008, Pages 1222-1229

  Rebouças, Geovanne Ferreira ^a   Gonçalves, Tarcisio De Moraes ^b   Martinez, Mário Luiz ^c   Azevedo Jr , Jairo ^d   Koops, Wiebe ^e  

^a FEDERAL UNIVERSITY OF LAVRAS   (Brazil)

^b UFLA

^c EMBRAPA CERRADOS   (Brazil)

^d NONE

^e WAGENINGEN UNIVERSITY   (Netherlands)

Author keywords

Cumulative milk yield; Daily milk yield; Gir cows; Lactation curve

Indexed keywords

BOS; BOS INDICUS;

EID: 47749127723     PISSN: 15163598     EISSN: 18069290     Source Type: Journal    
DOI: 10.1590/S1516-35982008000700012     Document Type: Article

References (10)

1. KEOWN, J.F.; Van VLECK, L.D. Extending lactation records in progress to 305-day equivalent. Journal of Dairy Science, v.56, n.8, p.1070-1079, 1972.
2. KOOPS, W.J.; GROSSMAN, M.; MICHALSKA, E. Multiphasic growth curve analysis in mice. Growth, v.51, p.372-382, 1987.
3. MORANT, S.V.; GNANASAKTHY, A.A. New approach to the mathematical formulation of lactation curves. Animal Production, v.49, n.2, p.151-162, 1989.
4. NEAL, H.D.; THORNLEY, J.H.M. The lactation curve in cattle; a mathematical model of the mammary gland. Journal of Agricultura Science, v.101, p.389-400, 1983.
5. PAPAJCSIK, I.A.; BODERO, J. Modelling lactations curves of Friesian cows in a subtropical climate. Animal Production, v.47, n.1, p.201-207, 1988.
6. PINEDA, A.M.G. Mathematical functions applied to dairy cow lactation curves. Florida: University of Florida, 1987. 246p. Thesis (Master of Science) - University of Florida, 1987.
7. STATISTICAL ANALYSES SYSTEMS - SAS. User's guide for Windows : statistic, Versão 8.0. Cary: SAS Institute, 1998. (CD-ROM).
8. SCHAEFFER, L.R.; DEKKERS, J.C.M. Random regressions in animal models for test-day production in dairy cattle. In: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 5., 1994, Guelph. Proceedings... Guelph: 1994. v.17, p.443-446.
9. WILMINK, J.B.M. Adjustment of test-day milk, fat and protein yields fro age, season and stage of lactation. Livestock Production Science , v.16, n.4, p.335-348, 1987.
10. WOOD, P.D.P. Algebraic model of the lactation curve in cattle. Nature, v.216, n.5111, p.164-165, 1967.