抄録
Procedure of bioassay for chicks was applied to ruminants. Calves of about 8-week-old were fed the same but restricted amount of basal diet and graded levels of corn starch or test materials. The feeding conditions was so adjusted that body weight gain of calves from 1 st to 6 th week was in proportion to dietary energy supply. Digestive ability of the calves was not disturbed and growth was smooth in the feeding conditions. All of the 3 samples tested were suggested to be available by calves, although palatability of di-lauryl succinate was low. Reliability of the estimate was discussed.
