Milk yield characterization (from 1986 to 2007) in Cuban dairy Zebu cattle genotypes (? Zebu: ? Holstein) and their crossbreds
Barra lateral del artículo
Publicado:
jun. 1, 2011
Contenido principal del artículo
Resumen
Milk yield (1986-2007) was characterized in Cuban dairy cows of Zebu genotypes (? Zebu: ? Holstein, after inter-se mating),
(? Zebu: ? Holstein and dairy Zebu crossbreds, cows with dairy Zebu sires), managed as dual-purpose. The traits under study
were total milk yield, lactation length, and milk yield/d (1517 records). Linear models were applied through the GLM procedure of SAS, including, as fixed effects, the genotype, the parturition year, the parturition season, the herd, the number of lactation, and the interaction year x parturition season. Besides, the influence of high and low input availability (before and after 1991) on milk yield was also analyzed. The significance of the genotype, the parturition year, and the herd was obtained in the three traits. The number of lactation was significant for total milk yield and milk yield/d, while the interaction parturition year x bimester was also significant for the lactation length and the milk yield/d. The season was never significant. The highest productions were reported in the crossbred (1266 ? 66kg) and in the ? (1240 ? 61kg) animals, while the poorer were in the Cuban dairy Zebu (1059 ? 36kg). The lack of resources (since 1991) provoked considerable fall in milk productions, not surpassing anew 1000 kg of total milk yield as average. The distribution of parturitions throughout the year was relatively stable for the three genotypes, with slight higher proportion of parturitions from January to April. This corresponded to the highest number of gestations during the periods of highest temperatures, rainfall, and pasture availability. These genotypes are an alternative to milk production with low inputs.
Key words: Cuban dairy Zebu, milk yield, calving year.
(? Zebu: ? Holstein and dairy Zebu crossbreds, cows with dairy Zebu sires), managed as dual-purpose. The traits under study
were total milk yield, lactation length, and milk yield/d (1517 records). Linear models were applied through the GLM procedure of SAS, including, as fixed effects, the genotype, the parturition year, the parturition season, the herd, the number of lactation, and the interaction year x parturition season. Besides, the influence of high and low input availability (before and after 1991) on milk yield was also analyzed. The significance of the genotype, the parturition year, and the herd was obtained in the three traits. The number of lactation was significant for total milk yield and milk yield/d, while the interaction parturition year x bimester was also significant for the lactation length and the milk yield/d. The season was never significant. The highest productions were reported in the crossbred (1266 ? 66kg) and in the ? (1240 ? 61kg) animals, while the poorer were in the Cuban dairy Zebu (1059 ? 36kg). The lack of resources (since 1991) provoked considerable fall in milk productions, not surpassing anew 1000 kg of total milk yield as average. The distribution of parturitions throughout the year was relatively stable for the three genotypes, with slight higher proportion of parturitions from January to April. This corresponded to the highest number of gestations during the periods of highest temperatures, rainfall, and pasture availability. These genotypes are an alternative to milk production with low inputs.
Key words: Cuban dairy Zebu, milk yield, calving year.
Detalles del artículo
Cómo citar
Rodr?guez, Y., & Ponce de Le?n, R. (2011). Milk yield characterization (from 1986 to 2007) in Cuban dairy Zebu cattle genotypes (? Zebu: ? Holstein) and their crossbreds. Cuban Journal of Agricultural Science, 45(3). Recuperado a partir de https://cjascience.com/index.php/CJAS/article/view/110
Sección
Ciencia Animal
Aquellos autores/as que tengan publicaciones con esta revista, aceptan los términos siguientes:
- Los autores/as conservarán sus derechos de autor y garantizarán a la revista el derecho de primera publicación de su obra, el cuál estará simultáneamente sujeto a la Licencia Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) que permite a terceros compartir la obra siempre que se indique su autor y su primera publicación esta revista. Bajo esta licencia el autor será libre de:
- Compartir — copiar y redistribuir el material en cualquier medio o formato
- Adaptar — remezclar, transformar y crear a partir del material
- El licenciador no puede revocar estas libertades mientras cumpla con los términos de la licencia
Bajo las siguientes condiciones:
- Reconocimiento — Debe reconocer adecuadamente la autoría, proporcionar un enlace a la licencia e indicar si se han realizado cambios. Puede hacerlo de cualquier manera razonable, pero no de una manera que sugiera que tiene el apoyo del licenciador o lo recibe por el uso que hace.
- NoComercial — No puede utilizar el material para una finalidad comercial.
- No hay restricciones adicionales — No puede aplicar términos legales o medidas tecnológicas que legalmente restrinjan realizar aquello que la licencia permite.
- Los autores/as podrán adoptar otros acuerdos de licencia no exclusiva de distribución de la versión de la obra publicada (p. ej.: depositarla en un archivo telemático institucional o publicarla en un volumen monográfico) siempre que se indique la publicación inicial en esta revista.
- Se permite y recomienda a los autores/as difundir su obra a través de Internet (p. ej.: en archivos telemáticos institucionales o en su página web) antes y durante el proceso de envío, lo cual puede producir intercambios interesantes y aumentar las citas de la obra publicada. (Véase El efecto del acceso abierto).