ビタミンE連日または間歇給与周産期乳牛における初乳および新生子牛血清中のビタミンE濃度

Abstract

Vitamin-E supplements were administered to cows in the periparturient period either daily (2, 000IU/dose) or twice weekly (7, 000IU/dose). Fourteen cows were divided into the following groups: 1) controls (n=5); 2) cows given vitamin-E supplements daily (n=5); and 3) cows given vitamin-E supplements intermittently (n=4). Comparisons were made of vitamin-E concentrations in the dam, the serum of their one-week-old calves, and the dam colostrum. Vitamin-E levels in colostrum were measured within 24 hours after parturition and in calf serum seven days after birth. The levels were significantly higher in both colostrum and calf serum in the group to which Vitamin-E supplements had been administered daily. Consequently, since they maintain high vitamin-E concentration levels in the dam's serum, daily supplements are useful in ensuring effective transmission of vitamin E to the calf by way of the colostrum.