β-Mannanase supplementation in Jersey cows' diets at a high-altitude Costa Rica dairy
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| Autores: | , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2023 |
| Descripción: | The effect of the inclusion of β-mannanase in feed for early lactating dairy cows on a commercial farm in the Oreamuno area of Cartago, Costa Rica was evaluated. Twenty-seven grazing Jersey cows were used, distributed based on milk production, days in lactation, and number of lactations in 3 experimental groups: 0%, 0.1%, and 0.2% inclusion of the β-mannanase enzyme. The variables analyzed were milk production (kg/day), milk corrected to 4% fat, percentage and kilograms of total solids, fat, protein, lactose, non-fat solids, somatic cell count (cs/ml), calcium (Ca), phosphorus (P), magnesium (Mg) and milk ureic nitrogen (MUN). A repeated measures analysis was carried out with a mixed linear model analyzed with the SAS statistical software and a Tukey test to determine the significance (p<0.05) of the possible effects of the use of the β-mannanase enzyme. No significant differences were found for any of the variables evaluated (p˃0.05), this was associated with the low mannan-oligosaccharides content of the experimental diet (21.12-29.46 g/animal/day). Therefore, it is concluded that under the conditions of this experiment, no effect of the inclusion of the enzyme β-mannanase in the diet of Jersey cows in early lactation was observed. |
| 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/54779 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/54779 |
| Access Level: | acceso abierto |
| Palabra clave: | enzimas manano-oligosacáridos producción calidad de leche minerales enzymes mannan-oligosaccharides production milk quality minerals |