One hundred and eighty one-day-old Arbor Acre (AA) male broiler chicks were randomly allocated into three groups with six replicates each. From d 8 the diet were supplemented with different levels of L-carnitine. i.e.0, 75 and 150 mg/kg, respectively.

• 将180只1日龄AA雄性肉鸡随机分为3组,每组6个重复,8日龄起在日粮中分别添加L肉碱0,75,150mg/kg。