| Autor: |
Bauman DE; Department of Animal Science, Cornell University, Ithaca, NY 14853-4801., Hard DL, Crooker BA, Partridge MS, Garrick K, Sandles LD, Erb HN, Franson SE, Hartnell GF, Hintz RL |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of dairy science [J Dairy Sci] 1989 Mar; Vol. 72 (3), pp. 642-51. |
| DOI: |
10.3168/jds.S0022-0302(89)79155-4 |
| Abstrakt: |
Eighty Holstein cows (first, second, or third lactation) were used to evaluate the efficacy of a prolonged-release formulation for sometribove (n-methionyl bovine somatotropin). Cows were fed ad libitum a complete mixed diet and milked twice daily. Cows were allocated randomly by parity to two treatment groups receiving 500 mg sometribove in a prolonged release formulation or excipient at 14-d intervals starting at 60 +/- 3 d postpartum and continuing for 36 wk. Treatment with sometribove increased FCM yield to a similar extent (11.4%, +3.1 kg/d) in primiparous and multiparous animals. Milk content of lactose, fat, ash, and Ca was not affected, but protein and phosphorous were slightly greater (less than 5%) in milk from sometribove-treated cows. Within a 14-d injection interval, animals treated with sometribove displayed a cyclic pattern in milk yield, but a similar pattern was not evident in feed intake. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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