Fecha/hora: 15/06/2024 21:10:43

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	22/07/2018	
Fecha de la última actualización: 	23/10/2019	
Autoria: 	ZANINE, A.M.; RODRIGUEZ MOTTA, J.P.; FERREIRA, D.J.; DE SOUZA, A.L.; RIBEIRO, M.D.; GERON, L.J.V.; FAJARDO, M.; SPRUNK, M.; PINHO, R.M.A.	
Afiliación: 	A.M. ZANINE, Universidade Federal do Maranhão (UFMA); JOSE PEDRO RODRIGUEZ MOTTA, Universidad de la República (UdelaR)/ Facultad de Agronomía; INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; D.J. FERREIRA, Universidade Federal do Maranhão (UFMA); A.L. DE SOUZA, Universidade Federal do Mato Grosso (UFMT); M.D. RIBEIRO, Universidade Federal de Goiás (UFG); L. J. V. GERON, Universidade Estadual do Mato Grosso; M. FAJARDO, Universidad de la República (UdelaR)/ Facultad de Agronomía; M. SPRUNK, Universidad de la República (UdelaR)/ Facultad de Agronomía; R. M. A. PINHO, Universidade Federal do Maranhão (UFMA).	
Título: 	Milk performance and grazing behaviour of dairy cows in response to pasture allowance.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Animal Production Science, 2019, Volume 59, Issue 4, Pages 749-756.	
DOI: 	10.1071/AN17513	
Idioma: 	Inglés	
Notas: 	Article history: Submitted: 26 July 2017 /Accepted: 15 February 2018 / Published online: 14 May 2018.	
Contenido: 	ABSTRACT.
This study aimed to evaluate the effects of pasture allowances on forage production, milk yield and composition, and grazing behaviour of Holstein cows during autumn. Thirty-six Holstein cows calving in the autumn were allocated to blocks considering: calving date, bodyweight, and body score. Treatments consisted of three pasture allowances as follows: high (HA; 38.4 kg DM/cow.day), medium (MA; 30.3 kg DM/cow.day), and low (LA; 26.8 kg DM/cow.day) pasture allowances. Forage mass and forage height pre-grazing were similar (P > 0.05) for all grazing targets. Pasture-use efficiency was affected (P < 0.05) by the pasture allowance. The highest and lowest efficiency was obtained with treatments LA and HA, respectively. The neutral detergent fibre content of forage harvesting was affected (P < 0.05) by the pasture allowance, with average of 44.8, 47.0, and 49.4 to HA, MA, and LA, respectively. There was an effect of pasture allowances (P < 0.05) on the milk yield per hectare and milk yield per cow. The highest production was observed in LA (438 L/ha.day) and the lowest in HA (314 L/ha.day). The percentage of milk fat, milk protein, and milk fat (g/cow.day) did not differ (P > 0.05) among pasture allowances. There was effect (P < 0.05) of pasture allowance with higher grazing time (369 min) and lower rumination time (23.3 min) observed to HA. Pasture allowances affected (P < 0.05) the total number of bites/day and bites/min, but did not affect (P > 0.05) bite mass. The pasture managements with low (26.8 kg DM/cow.day) pasture allowances provided better conditions for milk yield per area, likely due to the better grazing efficiency. However, pasture allowance provide little measurable changes on grazing behaviour.
@CSIRO	
Palabras-Clave: 	FODDER CROPS; GRAZING MANAGEMENT; MILK PRODUCTION; PASTURE UTILISATION.	
Thesagro: 	LECHERÍA; MANEJO DE PASTURAS; PRODUCCION DE LECHE.	
Categoría del tema: 	--	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (101647-1) - PXI - AP - DD - PP/ANIMAL PRODUCTION SCIENCE/2019 -  -  - DIS