Abstract: This experiment aimed to analyze the amino acid digestibility of Clostridium autoethanogenum protein in growing pigs. A total of 16 healthy growing pigs fitted with a T?cannula，with an average body weight of（38.2±4.4） kg，were selected for the trial. The experiment lasted 7 days（5?day adaptation period + 2?day trial period）. The pigs were assigned to two treatments，with 8 replicates per group，and were fed either a standardized ileal digestibility （SID）diet formulated with Clostridium autoethanogenum protein or a nitrogen?free diet. The results showed that The crude protein content of Clostridium autoethanogenum protein is 88.57%，with a total energy of 5514 kcal/kg. Among the essential amino acids，the contents of lysine，methionine，and threonine are 8.12% ，1.78% ，and 3.73% ， respectively. The apparent ileal digestibility of crude protein，lysine，methionine，and threonine in Clostridium autoethanogenum protein is 71%，72%，73%，and 74%，respectively，while the standardized ileal digestibility is 82%，87%，85%，and 89%，respectively.

Key words: Clostridium autoethanogenum protein；Growing pigs；Amino acid digestibility

摘要： 该文旨在分析乙醇梭菌蛋白在生长猪上的氨基酸消化率。选取健康、体重为（38.2± 4.4）kg的安装了“T型瘘管”的生长猪16头，试验共7 d（5 d预饲期+2 d试验期），试验共2个处 理，每个处理组8个重复，分别饲喂乙醇梭菌蛋白配制的SID（标准回肠末端氨基酸消化率）日 粮和无氮日粮。结果显示：乙醇梭菌蛋白的粗蛋白质为88.57%，总能为5 514 kcal/kg。必需氨 基酸中赖氨酸、蛋氨酸和苏氨酸的含量分别为8.12%、1.78%和3.73%。乙醇梭菌蛋白的表观回 肠末端消化率分别为71%、72%、73%、74%，标准回肠末端消化率分别为82%、87%、85%、89%。

关键词: 乙醇梭菌蛋白；生长猪；氨基酸消化率