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Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 31/10/2019
Fecha de la última actualización: | 31/10/2019
Autoria: | CAPELESSO, A.; KOZLOSKI, G.; MENDOZA, A.; PLA, M.; REPETTO, J.; CAJARVILLE, C.
Afiliación: | Departamento de Nutrición Animal, Universidad de la República, Facultad de Veterinaria, San José, Uruguay./Departamento de Zootecnia da Universidade Federal de Santa Maria, Rio Grande do Sul, Brasil.; Departamento de Zootecnia da Universidade Federal de Santa Maria, Rio Grande do Sul, 97105900, Brazil.; ALEJANDRO FRANCISCO MENDOZA AGUIAR, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARCELO PLA TEJERA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JOSE LUIS REPETTO CAPELLO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay./ Departamento de Producción de Bovinos, Universidad de la República, Facultad de Veterinaria, San José, Uruguay.; CECILIA CAJARVILLE, Departamento de Nutrición Animal, Universidad de la República, Facultad de Veterinaria, San José, Uruguay.
Título: | Reducing milking frequency in early lactation improved the energy status but reduced milk yield during the whole lactation of primiparous Holstein cows consuming a total mixed ration and pasture.
Año de publicación: | 2019
Fuente/Imprenta: | Journal of Dairy Science, October 2019, Volume 102, Issue 10, Pages 8919-8930.
DOI: | 10.3168/jds.2019-16629
Idioma: | Inglés
Notas: | Article history: Received March 15, 2019. / Accepted June 21, 2019.

Contenido:

Abstract:
To investigate the immediate and long-term performance effects of milking frequency during early lactation of primiparous dairy cows consuming a total mixed ration and pasture, 20 Holstein cows were assigned in a randomized block design to either once-daily (1×) or twice-daily (2×) milking during the first 8 wk of lactation (treatment period). After the treatment period, all cows were milked 2× until wk 43 of lactation. Cows were fed a total mixed ration (approximately 15 kg of DM/cow per day) and allowed to graze an oat pasture (Avena sativa). Dry matter intake was 19.1 kg of DM/cow per day on average and was not affected by treatments. Milk yield was 40% lower in cows milked 1× during the treatment period, and a carryover effect existed until wk 21 of lactation, resulting in a final reduction of 15% of milk yield in the whole lactation. Milk lactose concentration decreased, whereas fat and protein concentrations increased for cows milked 1×. Mobilization of energy reserves during the treatment period occurred in both groups, but cows milked 1× showed greater body condition score and greater backfat thickness. In conclusion, milking 1× during the first 8 wk of lactation resulted in immediate and carryover negative effects on milk and milk solid yield without affecting feed intake, resulting in the improved energy status of primiparous dairy cows.

Palabras-Clave: | DAIRY COWS; GRAZING; ONCE-DAILY MILKING; ORDEÑE UNA VEZ AL DIA; VACA HOLSTEIN.
Thesagro: | LECHERÍA; VACAS LECHERAS.
Categoría del tema: | L01 Ganadería
Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (103047-1) - PXI - AP - DD - PP/JDS/2019 -  -  - DIS