Data/hora: 19/05/2024 01:26:49

Provedor de dados: 	Revista Brasileira de Zootecnia	
País: 	Brazil	
Título: 	Concentrate and crude protein levels in diets for dairy Gyr lineage cows grazing elephant-grass during the rainy season	
Autores: 	Teixeira,Rafael Monteiro Araújo; Lana,Rogério de Paula; Fernandes,Leonardo de Oliveira; Oliveira,André Soares de; Campos,José Maurício de Souza; Pimentel,Joabe Jobson de Oliveira.	
Data: 	2011-06-01	
Ano: 	2011	
Palavras-chave: 	Concentrate ration; Elephant grass; Intake; Milk; Production; Protein.	
Resumo: 	The objective of this work was to evaluate the effects of three levels of concentrate (2.0, 4.0 and 6.0 kg/cow/day) and two levels of crude protein (CP) (14 and 16% total dietary dry matter), in comparison to mineral mixture (control) on the intake, apparent digestibility, milk composition and yield and on feed efficiency and use of concentrates of cows grazing elephant grass (Pennisetum purpureum, Schum) in the rainy season. Twenty-one milking Gyr cows with average body weight of 426 kg and yield of 13.0 kg of milk/cow/day at 55 days of lactation were distributed in randomized blocks design, with seven diets (treatments) in a 3 × 2 + 1 factorial arrangement and three replications, in a period of 84 days. Forage dry matter intake was not influenced by the diets, but total dietary dry matter intake increased by 45% with the inclusion of concentrate in the diet. However, milk yield increased by only 17% (1.76 kg more milk per day) with the use of concentrate. For dairy Gyr cows grazing elephant-grass during the rainy season, 2 kg of concentrate/cow/day and 14% of CP in the total diet provided the best productive response without harming body weight.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000600025	
Editor: 	Sociedade Brasileira de Zootecnia	
Relação: 	10.1590/S1516-35982011000600025	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zootecnia  v.40 n.6 2011	
Fonte: 	info:eu-repo/semantics/openAccess