Figure 1.

Effects of β-mannanase on the jejunum morphology of laying hens fed with ME-reduced diets (n = 8). CON: control diet; ME_{_100} or ME_{_200}: diets with ME reduced by 100 kcal/Kg or 200 kcal/Kg; ME_{_100}+β-M_{_0.15}: ME_{_100} diet + 0.15 g/Kg β-mannanase; ME_{_100}+β-M_{_0.2}: ME_{_100} diet + 0.2 g/Kg β-mannanase; ME_{_200}+β-M_{_0.15}: ME_{_200} diet + 0.15 g/Kg β-mannanase; ME_{_200}+β-M_{_0.2}: ME_{_200} diet + 0.2 g/Kg β-mannanase. Different lowercase letters of peer shoulder notes indicate significant differences (P < 0.05).