| Popis: |
Forty Holstein calves were allotted randomly before 24h of age to one of four groups and fed daily for 28 days via their liquid diet, either 0, 10, 20, or 40g sorbitol. Initial jugular blood samples were taken from all calves before receiving sorbitol and from 5 calves per treatment group at 30-min intervals for the first 8h postfeeding sorbitol before 24h of age. Total feed intake and incidence of scours were recorded daily, and calves were weighed every 7 days. Blood glucose concentrations of calves less than 24h of age fed 40g of sorbitol were lower during the first 8h postfeeding sorbitol than those of calves in the other treatment groups. No differences occurred in blood glucose concentrations of calves during the first 3 to 28 days. Average blood glucose of calves during the first 8h postfeeding sorbitol and during 3 to 28 days were 69.7 and 73.1 mg/dl. Blood fructose concentrations of calves fed 40g of sorbitol were higher during the first 8h than those of calves in the other groups. There were no differences in blood fructose of calves during 3 to 28 days. Average blood fructose of calves during the initial 8h and 3 to 28 days were 9.3 and 3.1 mg/dl. Elevated blood fructose during the first 8h appeared to depress glucose in blood. Calves appear to lose the ability to convert sorbitol to fructose by the 3rd day of life. There were no differences in body weight gains at weaning. However, calves fed sorbitol gained more body weight during the 1st wk of life. |
