Data/hora: 06/06/2024 03:03:14

Provedor de dados: 	118	
País: 	Chile	
Título: 	Finishing strategies for steers based on pasture or silage plus grain and time on feed and their effects on beef quality	
Autores: 	Morales,Rodrigo; Parga,Julian; Subiabre,Ignacio; Realini,Carolina E.	
Data: 	2015-04-01	
Ano: 	2015	
Palavras-chave: 	Beef quality; CLA; Fatty acids; Holstein Friesian steers.	
Resumo: 	The aims of the present study were to compare the quality of grain-fed and pasture-fed beef and to assess the effects of two feeding periods on grain for finishing steers. A group of 75 steers were fed one of 5 finishing diets (n = 15 per diet): pasture for 90 d (P), oat grain plus pasture silage for 35 d (SO), oat grain plus pasture silage for 75 d (LO), wheat grain plus pasture silage for 35 d (SW), and wheat grain plus pasture silage for 75 d (LW). The physicochemical and sensory attributes and the fatty acid composition of the longissimus lumborum muscle were determined. The beef from pasture-fed animals tended to be tenderer, darker, less red, and with yellower fat than the beef from grain-fed steers. The beef from steers fed wheat plus silage for 75 d had lower tenderness scores than beef from steers fed for 35 d on grain plus silage. The beef from pasture-fed steers had higher levels of conjugated linoleic acid c-9 t-11 and n-3 fatty acids and a lower n-6:n-3 fatty acid ratio than the beef from grain-fed steers. The time fed on grain plus silage had a significant effect on the fatty acid composition of the beef from steers fed wheat, but no similar effect was observed in beef from steers fed oats. However, the n-6:n-3 ratio of beef was more favorable when steers were fed grain (wheat or oats) plus silage for 35 d than for 75 d.	
Tipo: 	Journal article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000100001	
Editor: 	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal	
Formato: 	text/html	
Fonte: 	Ciencia e investigación agraria  v.42 n.1 2015