부산대학교 도서관

Three experiments during 1963-65 inclusive compared the effects of age at putting out to pasture on the performance of spring-born calves. Responses of calves to meal feeding at pasture and the effects of date of birth were also measured. The results of Experiment 1 showed that calves reared indoors performed better than those put out to pasture at 5 days of age, but the differences were statistically significant only in the periods 0 to 1 week and 12 to 16 weeks. Experiments 2 and 3 showed that there was no difference in the performance of calves (over 0 to 26 weeks) put out to grass at 3, 33 and 63 days of age. Calves born before mid-March grew faster than those born later and birth weight had little effect on subsequent calf performance. Response to meals was inconsistent and appeared to be determined by the standard of grassland management. It is suggested that there is no advantage in keeping spring-born calves indoors after 33 days of age.