| 摘要 |
The zootechnical compositions or combinations contain:… a) a zootechnical composition containing a beta-adrenergic agent,… b) a zootechnical composition containing a steroid of formula (A): …<IMAGE>… in which X represents hydrogen, an acyl radical derived from a (C1-C18) carboxylic acid or a (C1-C6) alkyl radical in which one carbon may be replaced by an oxygen, and optionally a second steroid for use simultaneously, separately or spread over a period of time. …<??>The compositions and combinations of the invention enable the weight gain and the quality of the meat to be improved in livestock. |
