Data/hora: 17/06/2024 08:20:50

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	07/07/2017	
Data da última atualização: 	27/01/2023	
Autoria: 	MATA E SILVA, B. C.; LOPES, F. C. F.; PEREIRA, L. G. R.; TOMICH, T. R.; MORENZ, M. J. F.; MARTINS, C. E.; GOMIDE, C. A. de M.; PACIULLO, D. S. C.; MAURÍCIO, R. M.; CHAVES, A. V.	
Afiliação: 	B. C. Mata e Silva, UFMG; FERNANDO CESAR FERRAZ LOPES, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; MIRTON JOSE FROTA MORENZ, CNPGL; CARLOS EUGENIO MARTINS, CNPGL; CARLOS AUGUSTO DE MIRANDA GOMIDE, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; R. M. Maurício, Universidade Federal de São João Del Rei; A. V. Chaves, UNIFENAS.	
Título: 	Effect of sunflower oil supplementation on methane emissions of dairy cows grazing Urochloa brizantha cv. marandu.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Animal Production Science, v. 57, n. 7, p. 1431-1436, 2017.	
Idioma: 	Inglês	
Conteúdo: 	The objective of the present study was to evaluate the effect of sunflower oil supplementation on methane (CH4) emission of crossbred Holstein · Gyr (Bos indicus) dairy cows grazing tropical pasture. Lactating dairy cows were fed Urochloa brizantha (syn Brachiaria brizantha) pasture managed under rotational grazing. Sunflower oil was supplemented to cows using concentrates with inclusion at 0% or 14.9% (DM basis). Crude fat concentrations in these concentrates were 2.4% and 13.8% respectively (DM basis). Dietary fat concentrations for control and supplemented sunflower oil treatments were 3.2% and 5.2% (DM basis) respectively. Sixteen lactating cows Holstein · Gyr (Bos indicus; 240 10 days in milk, 524 57 kg of bodyweight, 11.2 2.30 kg/day of milk) were used in the study. Methane emissions were estimated by the sulfur hexafluoride tracer technique. The experiment was a randomised-block design with two repetitions of pasture area, with two treatments (0 g or 383 g of sunflower oil supplementation, DM basis) and four replications (cows) per treatment per block. Methane emission and yield expressed as g CH4/day and g CH4/kg of DM intake decreased 21.5% (P = 0.048) and 20.2% (P = 0.032) respectively, in cows supplemented with sunflower oil compared with unsupplemented cows. There was no effect (P = 0.29) of sunflower oil supplementation on CH4 expressed as g CH4/kg of milk. Lactating dairy cows grazing tropical-grass pasture supplemented with sunflower oil (5.3% dietary fat; 383 g oil/day) demonstrated potential for mitigating CH4 emissions without negatively affecting cow milk yield or composition.	
Palavras-Chave: 	Greenhouse gas; Mitigation.	
Thesaurus Nal: 	forage; ruminants.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (23603-1) - UPC - AP - DD -  -  -  - DIS