Abbasi Arabshahi Hossein, Ghasemi Hossein Ali, Hajkhodadadi Iman, Khaltabadi Farahani Amir Hossein
Department of Animal Science, Faculty of Agriculture and Natural Resources, Arak University, 38156-8-8349 Arak, Iran.
Department of Animal Science, Faculty of Agriculture and Natural Resources, Arak University, 38156-8-8349 Arak, Iran.
Poult Sci. 2021 May;100(5):101066. doi: 10.1016/j.psj.2021.101066. Epub 2021 Feb 17.
A study was undertaken to determine the effects of supplemental multicarbohydrase (MC) and butyrate glycerides (BG) on productive performance, nutritional, and physiological responses in laying hens fed corn- or wheat-based diets during a 12-week production period (from 50-62 wk of age). The experiment consisted of a 2 × 2 × 2 factorial arrangement of the treatments with 2 different basal diets (corn- or wheat-based diets), 2 concentrations of MC (0 or 200 mg/kg of diet), and 2 concentrations of BG (0 or 2 g/kg of diet). Each treatment had 6 replicates with 8 hens each. The interactions among diet, MC, and BG were observed for egg production (P = 0.048), feed conversion ratio (P = 0.005), and ileal Escherichia coli count (P = 0.043), indicating that the effects of MC and BG on these responses were more marked when wheat-based diet was fed. A diet × MC interaction (P < 0.05) was also detected for egg mass, eggshell breaking strength, jejunal viscosity, and digestibility coefficients of fat and ash. Replacing 100% of the corn with wheat in the diets of laying hens negatively affected (P < 0.05) yolk color index, eggshell thickness, digesta viscosity, jejunal morphology, and populations of ileal microbiota. By contrast, MC supplementation increased (P < 0.05) eggshell thickness, digestibility coefficients of energy and crude protein, and populations of Lactobacillus and Bifidobacterium spp. in the ileum. Inclusion of BG also resulted in greater (P < 0.05) jejunal villus height and villus surface area, and digestibility coefficients of protein and ash, but lower (P < 0.05) populations of total bacteria, Salmonella and E. coli in the ileum. Results indicate that while the complete substitution of corn by wheat has a detrimental effect on productive performance and gut health, the combination of MC and BG may have synergistic effects on improving productive performance and intestinal microbiota in laying hens fed the wheat-based diets during the late laying period.
本研究旨在确定在12周的产蛋期（50至62周龄）内，补充复合碳水化合物酶（MC）和丁酸甘油酯（BG）对饲喂玉米或小麦基础日粮的蛋鸡生产性能、营养和生理反应的影响。试验采用2×2×2析因设计，有2种不同的基础日粮（玉米或小麦基础日粮）、2种MC浓度（0或200mg/kg日粮）和2种BG浓度（0或2g/kg日粮）。每个处理有6个重复，每个重复8只母鸡。观察到日粮、MC和BG之间在产蛋量（P = 0.048）、饲料转化率（P = 0.005）和回肠大肠杆菌计数（P = 0.043）方面存在交互作用，表明饲喂小麦基础日粮时，MC和BG对这些反应的影响更显著。在蛋重、蛋壳破裂强度、空肠粘度以及脂肪和灰分消化率系数方面也检测到日粮×MC交互作用（P < 0.05）。用小麦完全替代蛋鸡日粮中的玉米会对蛋黄颜色指数、蛋壳厚度、食糜粘度、空肠形态和回肠微生物群数量产生负面影响（P < 0.05）。相比之下，补充MC可提高（P < 0.05）蛋壳厚度、能量和粗蛋白消化率系数以及回肠中乳酸杆菌和双歧杆菌的数量。添加BG还可使空肠绒毛高度和绒毛表面积以及蛋白质和灰分消化率系数更大（P < 0.05），但回肠中总细菌、沙门氏菌和大肠杆菌数量更低（P < 0.05）。结果表明，虽然用小麦完全替代玉米会对生产性能和肠道健康产生不利影响，但在产蛋后期饲喂小麦基础日粮的蛋鸡中，MC和BG的组合可能对提高生产性能和肠道微生物群具有协同作用。
