日期:2013-02-25 10:29
approximately two. The tolerated fumaric acid concentration in complete diets for ruminants is higher. The margin of safety for pigs, poultry and ruminants is sufficiently high that setting a maximum content is not necessary. In contrast, the maximum safe level in milk replacer for veal calves （and probably other young mammals） is provisionally estimated to be 10 000 mg/kg milk replacer, with no margin of safety. Fumaric acid is rapidly metabolised by well-recognised pathways, and neither fum