Anco FIT Poultry featured in the ESPN 2019 (European Symposium on Poultry Nutrition) proceedings with a scientific abstract
Inclusion level effects of a phytogenic feed additive on broiler carcass traits, availability of dietary energy and expression of genes relevant for nutrient absorptive and metabolic functions of cell growth protein synthesis
Mountzouris, K.1, Paraskeuas, V. 1, Griela, E. 1, Kern, A. 2, Fegeros, K. 1
1Department of Nutritional Physiology and Feeding, Agricultural University of Athens, 118 55 Athens, Greece
2Anco Animal Nutrition Competence GmbH, Linzer Strasse 55, 3100 Sankt Poelten, Austria
The inclusion level of a phytogenic premix (PP) gut agility activator comprised of functional flavouring substances of ginger, lemon balm, oregano and thyme was investigated for its effects on broiler performance, carcass traits, nutrient digestibility, availability of dietary energy (AMEn) and expression of intestinal nutrient transporter (SGLT1, GLUT2, PEPT1, BOAT and LAT1) genes including genes FABP2 and mTORC1 relevant for cellular fatty acid uptake and protein synthesis, respectively. One-day-old Cobb broiler chickens (n=500) were assigned into four treatments, with five replicates of 25 chickens each.
Depending on PP inclusion level (i.e. 0, 750, 1000 and 2000 mg/kg diet) treatments were: Con, PP750, PP1000 and PP2000. Data were analysed by ANOVA and significant effects (P≤0.05) were compared using Tukey HSD test. Polynomial contrasts tested the linear and quadratic effect of PP inclusion levels.
Growth performance responses were not improved significantly (P>0.05) by PP inclusion. However, carcass (P=0.030) and breast yield (P=0.023) were higher in PP1000 compared to Con. In addition, PP1000 had higher AMEn (P=0.049) compared to PP2000 and Con. Gene expressions from 10 chickens per treatment of SGLT1, GLUT2, PEPT1, BOAT and FABP2 were not affected by PP.
However, PP affected the expression of LAT1 (P<0.001) in jejunum and that of mTORC1 in duodenum (P=0.010) and ceca (P=0.025). In particular, their expression increased with increasing PP inclusion level in a linear and quadratic pattern depending on the intestinal segment.
Overall, carcass and meat yield improvements by PP inclusion at 1000 mg/kg could be explained by the increased dietary energy available to the birds and the preliminary evidence for an improved muscle protein synthesis function.