为研究复合非淀粉多糖酶对谷物及其副产品氨基酸真代谢率的影响，试验选用56只体重为（2.0±0.2）kg的健康成年肉用公麻鸭，采用完全随机试验设计，分为7组，每组8个重复，每重复1只鸭，采用绝食强饲法进行5批次代谢试验，以单一原料+复合非淀粉多糖酶为饲粮，测定加酶前后谷物及其副产品的氨基酸真代谢率。结果表明：在小麦、玉米、小麦麸、玉米糖渣和干酒糟及其可溶物（DDGS）等谷物及其副产品中添加复合非淀粉多糖酶，多种氨基酸的真代谢率得到显著提高（P<0.05）；同时14种原料各氨基酸的有效营养改进值（ENIV）为0.01~1.24 g/kg，不同原料各氨基酸平均ENIV最高者为DDGS、玉米糖渣和小麦，分别为0.43、0.30和0.23 g/kg，最低者为燕麦麸，其氨基酸平均ENIV为0.07 g/kg。复合非淀粉多糖酶能提高谷物及其副产品的氨基酸真代谢率，改善谷物及其副产品的营养效价。

To study the effects of compound non-starch polysaccharide (NSP) enzyme on the true metabolic rates of amino acids of cereals and their by-products, a complete randomized design and five metabolic test periods had been taken, and 56 healthy adult ducks with body weight of (2.0±0.2) kg were randomly divided into 7 groups with 8 replicates in each group and 1 duck in each replicate. The diets were single raw material+compound NSP enzyme. The true metabolic rates of amino acids of cereals and their by-products were detected before and after enzyme added. Results showed that after adding enzymes, some true metabolic rates of amino acids of wheat, corn, wheat bran, corn sugar residue and dried distillers' grains and solubles (DDGS) were significantly increased (P<0.05). And the range of amino acid effective nutrient improvement value (ENIV) of 14 kinds of ingredients was 0.01 to 1.24 g/kg, and the highest average ENIV were DDGS, corn sugar residue and wheat, and the average ENIV were 0.43, 0.30 and 0.23 g/kg, respectively. The lowest average ENIV was oat bran, and the average ENIV was 0.07 g/kg. Generally speaking, compound NSP enzyme can improve the true metabolic rates of amino acids and nutritive value of cereals and their by-products.