Incidence of hypocupraemia in cattle in northern Uruguay and its alleviation with an injected Cu–Phenylalanine complex

Autor: Sylvia Saldanha, José Fuentes, María H. Torre, Eduardo Kremer, Teresita Porochin, Mauricio Ohanian, Verónica DiDonato, Carlos Irigoyen, Inés Viera, Julio Irigoyen, Gianella Facchin, Enrique J. Baran, Juan Bussi
Rok vydání: 2005
Předmět:
Zdroj: Livestock Production Science. 95:49-56
ISSN: 0301-6226
DOI: 10.1016/j.livprodsci.2004.11.041
Popis: Serum copper levels in dairy cattle have been studied in eight locations throughout Department of Salto, in Uruguay. The overall incidence of hypocupraemia lies in 30% which is not homogeneously distributed since some farms are almost exempt from hypocupraemical individuals. Copper complexes with Cu(Phe)2, Cu(Gly)2.H2O and Cu(Val)2 were evaluated as injectable sources of supplemental Cu in the most hypocupraemic herd and Cu(Phe)2 proved to be the best at improving Cu status. The efficacy of Cu(Phe)2 was tested in a further hypocupraemic herd, showing that the treated cattle maintained the serum copper level at an adequate level for at least 100 days. At the same time, analyses of copper, molybdenum, sulphur and phosphorous levels in grass were done along the year. Our results show that the copper content in grass was under adequate levels most part of the year, and the deficiency was more critical in autumn. Although the molybdenum and sulphur levels were low enough not to expect them to interfere in copper absorption, the Mo content may be enhancing the copper deficiency.
Databáze: OpenAIRE
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