High zinc method is better than starvation method.

高锌日粮法的效果优于饥饿法。

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The results showed as follows:The true amino acid digestibilities of the 9 feeds with endogenous amino acid loss measured with N-free diet methods were higher than those with starvation method.

试验结果表明：无氮日粮法测定的去盲肠鸭九种饲料氨基酸真消化率的平均值显著高于绝食法。

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