Abstract:

The study was conducted to establish an immunological stress model through intraperitoneal injecting with E. coli lipopolysaccharide (LPS) to explore the effects of an immunological stress on amino acid digestibility in different breeds of pig. 18 pigs were surgically fitted with simple T-cannulae at the distal ileum which used to determine the amino acids apparent digestibility after 14d. The result indicated that the immunological stress depressed apparent digestibility of 16 amino acids except CYS and HIS in different breeds of pig（P < 0.01）（P < 0.05）. The extent of change about total amino acids apparent digestibility , Yorkshire was higher than Laiwu pig and Lulai pig（P < 0.05）.