| Autor: |
Goering HK, Wrenn TR, Edmondson LF, Weyant JR, Wood DL, Bitman J |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of dairy science [J Dairy Sci] 1977 May; Vol. 60 (5), pp. 739-47. |
| DOI: |
10.3168/jds.S0022-0302(77)83928-3 |
| Abstrakt: |
Holstein cows fed concentrate:hay diets also were fed for 14 days supplements of soybean oil plus casein, soybean oil protected from ruminal hydrogenation by encapsulation in a casein-formaldehyde matrix, cottonseed oil plus casein, or cottonseed oil protected with casein formaldehyde. The supplements were fed at rates to give a linoleic acid (18:2) intake of 225 g/day. Yields of milk and milk protein were not affected by treatment. Milk 18:2 was not increased by the unprotected soybean oil or cottonseed oil but was increased by protected soybean and cottonseed oil from a control of 2.3 to 5.7% of total milk fat. Milk 18:0 and 18:1 also increased. Compensatory declines were observed in milk 16:0 and 14:0 acids. In fecal fatty acids during the treatment periods, percentage of 18:2 of the total fat decreased and 18:0 markedly increased. These results indicate hydrogenation of the dietary oils in the alimentary tract or a differential absorption. Fecal 16:0 and 14:0 decreased. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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