Grazing increases the concentration of CLA in dairy cow milka
| Autor: | Michael W. Pariza, Z. Wu, Glen A. Broderick, L. J. Massingill, M. N. Lahlou, R. Kanneganti, Y. Park, James D. Ferguson |
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| Rok vydání: | 2014 |
| Předmět: |
Omasum
Forage Total mixed ration Biology SF1-1100 Pasture Zea mays Animal science Fodder Blood plasma Grazing Animals Lactation Linoleic Acids Conjugated geography geography.geographical_feature_category Cross-Over Studies dairy cow Fatty Acids food and beverages CLA Crossover study Animal Feed Animal culture Diet pasture milk fatty acids Milk Milk fat Animal Science and Zoology Animal Nutritional Physiological Phenomena Cattle Female Medicago sativa |
| Zdroj: | Animal, Vol 8, Iss 7, Pp 1191-1200 (2014) |
| ISSN: | 1751-732X |
| Popis: | An experiment was conducted to examine whether increased CLA in milk of dairy cows fed fresh pasture compared with alfalfa and corn silages was because of ruminal or endogenous synthesis. Eight Holsteins were fed a total mixed ration using alfalfa and corn silages as the forage source in confinement or grazed in a replicated crossover design. The proportion of total fatty acids as CLA (primarily c9, t11-18:2) in g/100 g was 0.44 v. 0.28 in ruminal digesta, 0.89 v. 0.53 in omasal digesta and 0.71 v. 1.06 in milk during confinement feeding and grazing, respectively. Blood plasma CLA was 0.54 v. 1.05 mg/l for the two treatments, respectively. The increased concentration of CLA in milk with grazing likely resulted from increased synthesis through desaturation of t11-18:1 in the mammary gland. |
| Databáze: | OpenAIRE |
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