The result of the net requirement of amino acids for maintenance of Lys, Met, Thr, Try, Ile and Arg was 68mg, 19mg, 60mg, 39mg, 51mg and 69mg, respectively.

• 使用全收粪法收集排泄物。 测定结果为北京鸭皮屑及羽毛损失与内源氮损失总氨基酸净需要量为:赖氨酸68mg、蛋氨酸19mg、苏氨酸60mg、色氨酸39mg、异亮氨酸为51mg和精氨酸69mg。