INVESTIGADORES
BALZARINI Monica Graciela
artículos
Título:
Some factors affecting the number of days open in Argentinean dairy herds
Autor/es:
PICCARDI, M.; CAPITAINE FUNES, A.; BALZARINI, M.; BO, G.
Revista:
THERIOGENOLOGY
Editorial:
ELSEVIER SCIENCE INC
Referencias:
Año: 2013 vol. 79 p. 760 - 765
ISSN:
0093-691X
Resumen:
The purpose of this study was to estimate, the relative contribution of factors affecting how quickly cattle become pregnant in Argentinean dairy herds. A total of 76,401 cows corresponding to 249 dairy herds were analyzed. A hazard model was adjusted to explore days open (DO). The factors considered were milk yield, lactation number, calving season and breeding technique [i.e. type of service: artificial insemination (AI), and combined service]. Cows of lower milk yield had a 1.09 to 1.38 higher likelihood to get pregnant than those animals of higher production (P
