METHOD FOR IMPROVING GROWING AND BREEDING EFFICIENCY FOR AGRICULTURAL LIVESTOCK AND INCREASING MUSCLE/FAT RATIO AND EFFEUTIVE SUBSTANCE USED THEREIN

摘要

PURPOSE: To obtain high decomposition activity for fat with little side effect and to improve the muscle/fat ratio of agricultural cattle such as ruminant animals and poultry by feeding cattle with a compsn. containing a specified compd. CONSTITUTION: A compsn. containing a compd. expressed by formula I as a phenylalkylamino deriv. or its salt with addition of acid, or containing a compd. expressed by formula II or its salt with addition of acid is fed to an animal to increase the muscle/fat ratio, especially of a cow and sheep. In formula I, R1 is a phenylalkyl group having a phenyl group which may have substituents such as 1 to 3C alkyl, hydroxy or methoxy groups, or a thienylalkyl group having 1 to 3C alkyl groups, and R2 , R3 are methyl or ethyl groups. In formula II, n is 1 to 3, Ar is a thienyl or phenyl group which may have substituents of hydroxy or methoxy groups.