| 摘要 |
1415093 Poultry feedstuff additives ROUSSEL-UCLAF 19 Jan 1973 [20 Jan 1972] 3022/73 Heading A5B Compositions for use as additives to poultry feedstuffs comprise, as the active ingredient for the production of larger eggs and the quantitative and qualitative increase of egg laying, one or more 13#-alkyl-17#-hydroxygona-4, 9, 11-trien-3-ones of the general formula: wherein R represents an alkyl radical; and either R' represents a C 2-4 unsaturated hydrocarbon radical, optionally halogen substituted or a C 3-5 cycloalkyl radical, in admixture with a vehicle which is non-toxic and metabolically acceptable to poultry, the composition containing from 1 to 1000 parts per million of the active ingredient. The active ingredient is preferably 17α-ethynyl-17#-hydroxy-estra-4, 9, 11-trien-3-one and/or 17α- methallyl-17#-hydroxy - estra-4, 9, 11-trien- 3-one. The poultry feedstuffs prepared from the additive compositions of the invention may also contain mineral salts, oligo elements, vitamins, antioxidants, protein extracts and/or coccidiostatics. |
