Investigation of the vitamins A and E and β-carotene content in milk from UK organic and conventional dairy farms
| العنوان: | Investigation of the vitamins A and E and β-carotene content in milk from UK organic and conventional dairy farms |
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| المؤلفون: | C. Vyvyan Howard, Dai Grove-White, Ana Monteiro, Giles T. Innocent, Kathryn Ellis, M. Mihm, W Graham McLean, Peter J. Cripps |
| المصدر: | Journal of Dairy Research. 74:484-491 |
| بيانات النشر: | Cambridge University Press (CUP), 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Vitamin, Time Factors, Silage, medicine.medical_treatment, Biology, chemistry.chemical_compound, fluids and secretions, beta-Carotene, medicine, Animals, Vitamin E, Food science, Animal Husbandry, Vitamin A, Carotenoid, chemistry.chemical_classification, Carotene, Retinol, food and beverages, General Medicine, beta Carotene, United Kingdom, Dairying, Milk, chemistry, Herd, Cattle, Female, Animal Science and Zoology, Food Science |
| الوصف: | During a 12-month longitudinal study, bulk-tank milk was collected from organic (n=17) and conventional (n=19) dairy farms in the UK. Milk samples were analysed for vitamin A (retinol), vitamin E (α-tocopherol) and β-carotene content. The farming system type, herd production level and nutritional factors affecting the milk fat vitamin content were investigated by use of mixed model analyses. Conventionally produced milk fat had a higher mean content of vitamin A than organically produced milk fat, although there were no significant differences in the vitamin E or β-carotene contents between the two types of milk fat. Apart from farming system, other key factors that affected milk fat vitamin content were season, herd yield and concentrate feeding level. Milk vitamin content increased in the summer months and in association with increased concentrate feeding, whilst higher-yielding herds had a lower milk vitamin E and β-carotene content. Thus, conventional dairy farms in the UK produced milk with a higher vitamin A content, possibly owing to increased vitamin A supplementation in concentrate feeds. However, knowledge of the effects of season, access to fresh grazing or specific silage types and herd production level may also be used by all producers and processors to enhance the vitamin content in milk. |
| تدمد: | 1469-7629 0022-0299 |
| DOI: | 10.1017/s0022029907002816 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f5287df18de9b113f567b7e43e2a1f1 https://doi.org/10.1017/s0022029907002816 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....1f5287df18de9b113f567b7e43e2a1f1 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14697629 00220299 |
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| DOI: | 10.1017/s0022029907002816 |