Effects of glutamine supplementation on performance, mucosal enzymes and intestinal characteristics in broilers

The potential of glutamine supplementation in reduced-crude protein diets for chicken-meat production

“…Similar significant responses were also observed at 21 d post-hatch. Moreover, 10 g/kg glutamine increased the average apparent ileal digestibility coefficients of 17 amino acids by 9.52% (0.782 versus 0.714) in the Wu et al. (2020) study.…”

“…In addition to growth performance, positive responses to glutamine in small intestinal gut morphology were reported in 11 of the 19 studies, which are identified in Table 1 . For example, 10 g/kg glutamine significantly increased villus height by 6.68% (1357 versus 1272 μm) and decreased crypt depth by 7.01% (160.4 versus 172.5 μm) resulting in an expansion of the villus height to crypt depth ratio from 7.38 to 8.46 at 42 d post-hatch in Wu et al. (2020) .…”

“…(2019) Wheat-sorghum-soy diets 194 and 177 g/kg CP 7 to 42 d post-hatch Glutamine at 10 g/kg decreased weight gain by 7.17% (2137 vs. 2302 g/bird) Glutamine at 10 g/kg compromised FCR by 0.93% (1.08 vs. 1.07) Carvalho et al. (2020) Maize-soy diets 229 g/kg CP 7 to 35 d post-hatch Glutamine at 10 g/kg decreased weight gain by 4.58% (137.5 vs. 144.1 g/bird) Glutamine at 10 g/kg improved FCR by 0.13% (1.519 vs. 1.521) Karamik and Kop-Bozbay (2020) ∗ Maize-soy diets 219 and 198 g/kg CP 1 to 42 d post-hatch Glutamine at 10 g/kg increased weight gain by 0.39% (2571 vs. 2561 g/bird) Glutamine at 10 g/kg improved FCR by 2.17% (1.80 vs. 1.84) Note: Birds received glutamine for the first 7 d only Wu et al. (2020) ∗ Maize-wheat-soy diets 229 and 215 g/kg CP 1 to 42 d post-hatch Glutamine at 10 g/kg increased weight gain by 6.72% (106.69 vs. 99.97 g/bird) Glutamine at 10 g/kg improved FCR by 6.57% (1.85 vs. 1.98) P < 0.05 “ P < 0.05” denotes that the response was statistically significant.…”