Effect of β-carotene supplementation in dairy cows on concentrations in blood and colostrum, reproduction and udder health
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| Autores: | , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2022 |
| Descripción: | Green forages have high concentrations of β-carotene, but these can be reduced during storage, from levels of 300 ppm to 10 ppm at the end of winter. β-carotene concentrations in cows are affected by the productive cycle, where plasma concentrations decrease during the dry period, reaching their lowest point around day 4 or 6 postpartum; causing reproductive problems due to the possible affectation of progesterone levels. This study was carried out between August 2014 and December 2015 in San Pedro de Poás (Costa Rica), in a semi-stabled dairy. The effect of different sources of β-carotene on its concentrations in colostrum and blood, progesterone concentration, reproductive parameters and somatic cells in milk was evaluated. Eighteen dry cows were used for this study, separated into 3 groups (Control, parenteral β-carotene (T1) and enteral β-carotene (T2)). Plasma concentrations of β-carotene were affected during the productive cycle, being the lowest level just after calving (p<0.015). Enteral administration of β-carotene was only able to produce significant changes in blood concentrations of progesterone and β-carotene during the first 120 days postpartum, without significantly affecting the reproductive parameters of the evaluated cows or somatic cell counts. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/50819 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/50819 |
| Palabra clave: | vitamina A progesterona parto retención de membranas fetales mastitis células somáticas Vitamin A progesterone calving retention of fetal membranes somatic cells |