dietary putrescine effects on performance parameters, nutrient digestibility, intestinal morphology and tissue polyamine content of broilers fed low protein diet

this study was carried out to investigate the effects of dietary putrescine (put) on broiler’s response fed low crude protein (cp) diets. a total of 192 male day old chicks were fed with four dietary treatments including two levels of put (0 and 0.03%) and two levels of cp (normal and low) with factorial combinations. weekly growth performance, nutrient digestibility and intestinal morphology (at the age of 21 days) and liver and intestinal tissue polyamines content were measured. as a result of this study lower dietary cp had a significant (penergy efficiency ratio (eer) significantly (pon eer in chicks fed cp-deficient diet, indicating possible involvement of put in energy metabolism. put supplementation did not moderate the reduced bwg of the chicks fed low protein. intestinal and liver polyamine concentration was mainly affected by dietary cp and age of the birds rather than dietary put.