Rumen-protected choline administration to transition cows: effects on milk production and vitamin E status.
J Vet Med A Physiol Pathol Clin Med
; 50(1): 18-21, 2003 Feb.
Article
en En
| MEDLINE
| ID: mdl-12650504
We investigated the influence of rumen-protected choline (RPC) supplementation on milk production, lipid metabolism and vitamin E status in dairy cows receiving a silage-based diet. Twenty-six Italian Holstein multiparous cows were assigned by weight and average production in the previous lactation, to one of two groups: control (no RPC supplementation) and RPC (supplemented with 20 g/day rumen-protected choline chloride). Treatment began 14 days before expected calving and continued for 30 days after parturition. Choline administration significantly increased milk production during the first month of lactation and also the concentration (and total secretion) of choline in milk, but did not affect fat or protein concentrations in milk, or plasma levels of glucose, beta-hydroxybutyrate, cholesterol and non-esterified fatty acids (NEFA). However, around parturition, NEFA concentrations in plasma were lower in treated animals than in controls, suggesting improved lipid metabolism as a result of choline supplementation. Choline supplementation also increased alpha-tocopherol plasma concentrations, suggesting a novel aspect in dairy cows.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Rumen
/
Vitamina E
/
Lactancia
/
Bovinos
/
Colina
/
Suplementos Dietéticos
/
Leche
/
Ácidos Grasos no Esterificados
Límite:
Animals
Idioma:
En
Revista:
J Vet Med A Physiol Pathol Clin Med
Año:
2003
Tipo del documento:
Article
País de afiliación:
Italia
Pais de publicación:
Alemania