Data/hora: 23/06/2024 00:46:40

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	21/08/1995	
Data da última atualização: 	13/04/2009	
Autoria: 	WARD, G. M.; NAGY, J. G.	
Título: 	Molybdenum and copper in Colorado forages, molybdenum toxicity in deer, and copper supplementation in cattle.	
Ano de publicação: 	1976	
Fonte/Imprenta: 	Proceedings of an International Symposium. In: Molybdenum in the Environment, 1975, v.1, p.97-113, 1976.	
Idioma: 	Inglês	
Conteúdo: 	The molybdenum content of feeds from Denver milkshed farms ranged, in ppm, from 2 to 5 for alfalfa hay, 1 to 2 for corn silage, and 1.0 or less for grain mixes. The copper content, in ppm, was 10 to 20 for hay and silage and 5 to 8 for grain. The molybdenum content of milk from these farmas was 25 to 75 ppb. Levels of 20 to 40 ppm Mo were found in hay produced in one valley, but no clinical symptoms were observed in the cattle being fed this hay. Forages containing low copper (< 5 ppm) have been identified in other mountain
valleys. Molybdenum levels are normal or low but the resulting Mo : Cu ratios may appro-
ach 1 : 0 which canm produce clinical symptoms of hypocuprosis. Sixty calves from three ranches were treated with copper injections but no improvement in weight gain occurred over a three month period when compared to controls. Six mule deer were fed diets con-
taining about 50, 200, and 1,000 ppm Mo to determine their susceptibility to molybdeno-
sis. No clinical symptoms were observed after 33 days intake of 1,000 ppm. One animal died that received 5,000 ppm Mo for 15 days after 22 days on the 200 ppm Mo diet. Deer
appear to be far more tolerant of molybdenum than sheep or cattle.	
Palavras-Chave: 	Cervo; Colorado forage; Copper suplementation; Molibdenum; Suplementacao de cobre; Toxicidade.	
Thesagro: 	Gado; Molibdênio.	
Thesaurus Nal: 	cattle; deer; toxicity.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (29310-1) - ADD - SP - -- - SP0942 -  - 0942 - DIS