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| 氮一蛋白换算系数一般用;25×含氮量求得，即以蛋白质中含氮量占16%计，实际含氮量为15.5%〜18.0%不等 | |||
| 氮-蛋白质换算因数 (一般为6.25、以6.25乘含氮量为粗蛋白量) | |||
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