Data/hora: 07/06/2024 02:37:46

Biblioteca(s): 	Embrapa Acre.	
Data corrente: 	05/10/2011	
Data da última atualização: 	06/07/2021	
Autoria: 	SALES, M. F. L.; PAULINO, M. F.; VALADARES FILHO, S. de C.; PORTO, M. O.; COUTO, V. R. M.; PAULINO, P. V. R.	
Afiliação: 	MAYKEL FRANKLIM LIMA SALES, CPAF-AC; Mário Fonseca Paulino, UFV; Sebastião de Campos Valadares Filho, UFV; Marlos Oliveira Porto, UFV; Victor Rezende Moreira Couto, UFV; Pedro Veiga Rodrigues Paulino, UFV.	
Título: 	Macromineral requirements by beef cattle under pasture supplementation.	
Ano de publicação: 	2011	
Fonte/Imprenta: 	Revista Brasileira de Zootecnia, Viçosa, v. 40, n. 2, p. 426-432, 2011.	
ISSN: 	1806-9290	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to determine macromineral requirements by Zebu steers grazing Brachiaria decumbens supplemented with concentrate. It was used 24 non-castrated steers, at an average age of 7 months and at initial average weight 180 kg. Eight control animals were slaughtered for determining initial body composition. The 16 remaining animals were divided in four four-animal plots, in a complete random design. Each plot received mineral mixture or supplements at the levels 0.75; 1.50 or 2.25 kg/animal/day. The right half-carcass of eight animals, two per group, was dissected in muscle, fat and bones and all body constituents were weighted for determination of empty body weight and body composition. Net requirements of calcium and phosphorus for an animal at 400 kg body weight were 11.13 g and 5.40 g, respectively. To estimate dietary requirements of maintenance and after, sum them to dietary requirements for gain in order to obtain total dietary requirements, it was adopted endogenous losses and bioavailability present in literature for each mineral macroelement. Total dietary requirement for calcium, phosphorus, magnesium, sodium and potassium for a 400-kg BW animal with 1.0-kg daily weight gain were 34.59; 17.36; 7.82; 5.19 and 41.11 g/day, respectively. Macromineral requirements by beef cattle under pasture supplementation are similar to those recommended by BR-Corte for beef cattle in feedlots.	
Palavras-Chave: 	Becerros castrados; Beef steer; Cebú; Ganado de carne; Nutrición animal; Pastizales; Pastos forrajeros; Suplementos dietéticos minerales.	
Thesagro: 	Brachiaria decumbens; Cálcio; Capim Brachiaria; Fósforo; Gado de corte; Gado Zebu; Gramínea forrageira; Magnésio; Novilho de corte; Nutrição animal; Pastagem; Potássio; Sódio; Suplemento mineral.	
Thesaurus Nal: 	Animal nutrition; Beef cattle; Calcium; Dietary mineral supplements; Forage grasses; Magnesium; Pastures; Phosphorus; Potassium; Sodium; Steers; Zebu.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/159730/1/23949.pdf	
Registro original: 	Embrapa Acre (CPAF-AC)	
Exemplares: 	CPAF-AC - (23949-1) - UPC - AP - PP - SP 316 -  - 2014.00461 - DES
CPAF-AC - (23949-2) - UPC - AP - DD -  -  -  - DIS