The ideal pattern of amino acids for maintenance (Relative to Lys) was Lys100,Met28,Thr103,Try75,Ile75,Arg101, respectively.

• 成年北京鸭维持的氨基酸组成模式为:赖氨酸100,蛋氨酸28,苏氨酸103,色氨酸75,异亮氨酸75,精氨酸101。