Urea nitrogen absorbed from the hindgut is used efficiently for body protein deposition in pigs fed a diet deficient in non-essential amino acid nitrogen

摘要

The absorption of nitrogen (N) from the hindgut of monogastric animals is thought to be of little value for supporting body protein synthesis. However, N that is absorbed from the lower gut, largely in the form of ammonia, can be used for synthesis ofnon-essential amino acids (NEAA) or converted to urea. The latter can be excreted in urine or recycled into the upper gut and contribute to microbial-produced amino acids that can be of benefit to the host (Fuller, 2012). The objective of the present experiment was to explore the efficiency of using N absorbed from the hindgut for body protein deposition in growing pigs fed a diet deficient in NEAA-N.