Data/hora: 29/05/2024 04:23:16

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	16/03/2017	
Data da última atualização: 	16/03/2017	
Autoria: 	NAKAMURA, Y.; TADA, Y.; SAITO, O.; YOSHIDA, J.; NAKAMURA, R.	
Título: 	Nitrate metabolism of microorganisms in the rumen of sheep fed high nitrate italian rye grass silage.	
Ano de publicação: 	1981	
Fonte/Imprenta: 	The Japanese Journal of Veterinary Science v. 52, n. 7, p. 512-518, Jul. 1981.	
Idioma: 	Japonês	
Conteúdo: 	Abstract: Whether ensiled Italian ryegrass of high nitrate content would cause poisoning in ruminants was studied. The chopped high nitrate silage containing 0.35 g nitrate/kg body wt was introduced into the rumen of sheep through fistula twice a day for 4 days. On the 1st day of feeding with high nitrate silage, ruminal nitrate disappearance, nitrite appearance and then disappearance rates were slow. These rates increased from 2nd-4th day and maximum nitrite concentration decreased simultaneously as rumen microorganisms adapted to nitrate. The decrease of lactic acid, pH restoration and increased total volatile fatty acids and ammonia were faster in the rumen of animals who showed rapid disappearance of nitrate and nitrite. More vigorous reduction of nitrate and nitrite in vitro was observed without the marked fall of media pH when rumen microorganisms adapted to nitrate. These reduction rates were accelerated by the addition of protozoal fraction. Feeding ensiled high nitrate grass might reduce nitrate toxity for ruminants due to rapid reduction of nitrate and nitrite by rumen microorganisms as the result of providing H donors such as lactate produced in silage fermentation.	
Palavras-Chave: 	Metabolismo ruminal.	
Thesagro: 	Alimento para animal; Azevém; Gramínea forrageira; Nitrato; Nutrição animal; Ovino; Silagem.	
Thesaurus Nal: 	Animal nutrition; Lolium; Metabolism; Sheep.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (33149-1) - ADD - AP - PP -  -  -  - DIS