Data/hora: 09/06/2024 09:35:16

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	24/04/2019	
Data da última atualização: 	24/01/2023	
Autoria: 	SANTOS, G. B. DOS; BRANDÃO, F. Z.; RIBEIRO, L. DOS S.; FERREIRA, A. L.; CAMPOS, M. M.; MACHADO, F. S.; CARVALHO, B. C. de.	
Afiliação: 	Gustavo Bervian dos Santos, UFF; Felipe Zandonadi Brandão, UFF; Lilian dos Santos Ribeiro, UFF; Alexandre Lima Ferreira, UFF; MARIANA MAGALHAES CAMPOS, CNPGL; FERNANDA SAMARINI MACHADO, CNPGL; BRUNO CAMPOS DE CARVALHO, CNPGL.	
Título: 	Milk production and composition, food consumption, and energy balance of postpartum crossbred Holstein-Gir dairy cows fed two diets of different energy levels.	
Ano de publicação: 	2019	
Fonte/Imprenta: 	Tropical Animal Health and Production, v. 51, p. 65-71, 2019.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this study was to evaluate the production, consumption, and energy balance parameters of primiparous 3/4 and 7/8 Holstein × Gir (HG) dairy cows fed two diets of differing energy levels during the postpartum period. At the beginning of the study, 28 days prepartum, the average weight of both genetic groups was 498 ± 12 kg and body condition score (BCS) was 3.5 ± 0.05. At the end of the study, 61 days postpartum, the 3/4 HG cows had higher weight and body condition scores than the 7/8 HG (456 ± 8 and 429 ± 8 kg and 3.13 ± 0.03 and 2.94 ± 0.03 BCS for 3/4 HG and 7/8 HG, respectively). Milk from cows fed the highenergy diet had higher percentages of fat, protein, lactose, and total dry extract than cows fed the low-energy diet. Cows fed the high-energy diet had higher net energy intake (95.3 ± 1.9 vs. 88.1 ± 2.1 MJ/day) and higher energy balance (3.64 ± 2.13 vs &#8722; 6.02 ± 2.30 MJ/day). The 3/4 HG cows displayed higher energy for maintenance (33.1 ± 0.4 MJ/day) than the 7/8 HG (31.5 ± 0.5 MJ /day). In conclusion, although the primiparous 3/4 HG were heavier than the 7/8 HG and had a higher body condition score, no differences in milk produced up to 60 days postpartum were observed. The higher energy diet during the postpartum period increased energy balance, resulting in higher production of milk fat, protein, and lactose.	
Palavras-Chave: 	Energy consumption; Primiparous.	
Thesaurus Nal: 	Dairy cattle; Girolando; Milk composition.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (24629-1) - UPC - AP - DD -  -  -  - DIS