Nitrogen intake in HM group was the highest, and extremely significantly higher than that in other groups (P<0.01);

水貂食入氮以HM组最高，极显著高于其他各组（P<0.01）；

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Nitrogen intake in HM group was the highest, and extremely significantly higher than that in other groups (P<0.01);

水貂食入氮以HM组最高，极显著高于其他各组（P<0.01）；

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