关键词: 乙醇梭菌蛋白；生长猪；氨基酸消化率

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