Composition of the diets (as-fed basis).

1CC = control corn; PTC = phytase transgenic corn.2Provided per kilogram of diet: vitamin A, 12,200 IU; vitamin D3, 4,125 IU; vitamin E, 30 IU; vitamin K, 4.5 mg; thiamine, 1 mg; riboflavin, 8.5 mg; calcium pantothenate, 50 mg; niacin, 32.5 mg; pyridoxine, 8 mg; biotin, 2 mg; folic acid, 5 mg; vitamin B12, 5 mg; manganese, 80 mg; iodine, 1 mg; iron, 60 mg; copper, 8 mg; zinc, 80 mg; selenium, 0.3 mg.3Calculated values.4Determined values.

1. CC = 对照玉米（control corn）；PTC = 植酸酶转基因玉米（phytase transgenic corn）。2. 每千克日粮中含有的营养成分含量如下：维生素A 12200 IU；维生素D3 4125 IU；维生素E 30 IU；维生素K 4.5 mg；硫胺素1 mg；核黄素8.5 mg；泛酸钙50 mg；烟酸32.5 mg；吡哆醇8 mg；生物素2 mg；叶酸5 mg；维生素B12 5 mg；锰80 mg；碘1 mg；铁60 mg；铜8 mg；锌80 mg；硒0.3 mg。3. 计算值。4. 实测值。