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Table 7 Short-chain fatty acid (SCFA) concentrations in caecal digesta of broilers

From: Suitability of Hermetia illucens larvae meal and fat in broiler diets: effects on animal performance, apparent ileal digestibility, gut histology, and microbial metabolites

 Items Protein × Fat SE P-value Protein (LSMean) SE P-value Fat (LSMean) SE P-value
  S + 0 L S + 50 L S + 100 L L + 0 L L + 50 L L + 100 L S L 0 L 50 L 100 L
SCFA, mmol/kg fresh matter
 Acetic acid 102 99.1 120 113 97.0 101 8.168 0.0351 107 104 6.888 0.425 107uv 98.0v 110u 7.229 0.070
 Propionic acid 14.0 12.3 13.4 15.1 13.7 12.5 2.036 0.695 13.2 13.7 1.633 0.682 14.6 13.0 12.9 1.742 0.483
 Butyric acid 17.5 19.9 23.1 18.3 16.4 17.3 1.667 0.113 20.2 17.3 1.119 0.031 17.9 18.2 20.2 1.278 0.262
 Valeric acid 2.02 2.22 2.12 1.91 2.30 1.82 0.314 0.756 2.02 2.01 0.239 0.579 1.97 2.26 1.97 0.260 0.406
BCFA, mmol/kg fresh matter
 Isobutyric acid 1.82 1.76 2.07 1.64 2.03 1.37 0.596 0.429 1.88 1.68 0.516 0.501 1.73 1.90 1.72 0.537 0.862
 Isovaleric acid 0.29 0.31 0.30 0.16 0.32 0.15 0.181 0.657 0.30 0.21 0.165 0.274 0.22 0.32 0.22 0.169 0.527
  1. S, soybean meal; L; 15% of SBM crude protein substituted with HI larvae meal CP; S + 0 L, SBM + 0 HI larvae fat; S + 50 L, SBM + 50% HI larvae fat; S + 100 L, SBM+ 100% HI larvae fat; L + 0 L, HI larvae meal+ 0% HI larvae fat; L + 50 L, HI larvae meal+ 50% HI larvae fat; L + 100 L, HI larvae meal + 100% HI larvae fat
  2. u,v indicate differences by trend (0.05 ≤ P ≤ 0.10) for the main effect of fat source
  3. 1post hoc test Tukey P > 0.10
  4. SE Standard error