本研究旨在通过建立数学模型估测肉鹅的氨基酸需要量。利用析因法将肉鹅的氨基酸需要量剖分为生长和维持2部分。试验1：设计无氮和低氮2种饲粮，研究维持状态下肉鹅蛋白质需要量。试验2：利用屠宰试验，分析肉鹅沉积于羽毛、胴体和内脏中的蛋白质量，研究肉鹅生长的蛋白质需要量。结果表明：肉鹅由皮肤脱落损失的蛋白质量为6.52 g/d，肌酐代谢排出的蛋白质量为1.26 g/d，内源损失的蛋白质量为3.48 g/d，由此得出肉鹅维持每千克代谢体重的蛋白质需要量为5.37 g/d；单位体增重中沉积于羽毛和体组织（胴体和内脏）中的蛋白质量分别为0.045 1和0.141 8 g/d。由上述结果估测肉鹅氨基酸需要量的数学模型为：AA＝5.37W2/3×MAA+0.045 1ΔW×FAA+0.141 8ΔW×CAA。式中：AA为氨基酸需要量（g/d）；W2/3为代谢体重（kg）；ΔW为日增重（g）；MAA、FAA、CAA分别为维持、羽毛、胴体生长的氨基酸模式。利用此模型对肉鹅0～9周龄的氨基酸需要量进行动态估测，多数氨基酸的需要量高于前苏联畜牧科学研究所(1985)的建议量。

The objective of this study was to formulate a mathematic model to calculate the amino acid requirements of meat geese. The amino acid requirements of maintenance and growth were calculated according to the factorial method. In trial 1, a nitrogen-free diet and a nitrogen-low diet were designed and applied for the determination of protein requirement of maintenance. In trial 2, in order to research into the protein requirement of growth, a slaughter test was used to measure the amount of protein deposition in feather, carcass and viscera, respectively. The results showed that the amount of protein lost was 6.52 g/d from skin, 1.26 g/d from the creatinine metabolism and 3.48 g/d from intestinal losses, so the protein requirement of maintenance of meat geese should be 5.37 g/(d?W2/3). The amount of protein deposition in feather and body tissue (carcass and viscera) per kg daily weight gain was 0.045 1 and 0.141 8 g, respectively. According to the results, we have formulated a mathematic model for development of amino acid requirements of meat geese as follows: AA＝5.37W2/3×MAA+0.045 1ΔW×FAA+0.141 8ΔW×CAA, where AA is amino acid requirement (g/d); W2/3 is metabolic body weight (kg); ΔW is daily weight gain (g); MAA, FAA and CAA are the amino acid patterns for maintenance, feather growth and carcass growth, respectively. Using this model, we get the amino acid requirements of meat geese from 0 to 9 weeks of age, most of which are higher than the recommended requirements by the Former Soviet Union Institute of Animal Science. ［Chinese Journal of Animal Nutrition, 2010，22（6）:1717-1723］