Fecha/hora: 09/06/2024 14:25:20

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