Desert Research Center, Mataria, Cairo, Egypt.
Trop Anim Health Prod. 2023 Jan 26;55(1):46. doi: 10.1007/s11250-023-03476-9.
This study was conducted to evaluate the effects of supplementation of exogenous enzymes in broiler diets that includes fermented canola meal on performance, nutrient digestibility, biochemical indication, antioxidative capacity, digestive enzyme activity, immune responses, and gut health. Five hundred 1-day-old Ross 308 broiler chicks were randomly allocated into five experimental groups (5 replicate/group), the first group: a control (CON) contained a basal diet, and the second to the fifth groups were fed diets as follows: containing 20% canola meal (CM), contains 20% fermented canola meal (FCM), contains 20% canola meal and exogenous enzymes at 0.02%/kg feed (ECM), and contains 20% fermented canola meal and exogenous enzymes at 0.02%/kg feed (EFC), respectively. At the finisher phase, the best body weight gain, feed conversion ratio, and nutrient utilization were associated with chickens fed EFC compared to other groups (P < 0.05). Total protein, albumin, alanine aminotransferase, and superoxide dismutase levels increased (P < 0.05), while cholesterol and malondialdehyde levels decreased in chickens fed on EFC. Likewise, there was a significant increase in the relative weight of the bursa of Fabricius and antibody titer against Newcastle disease, whereas the weight of abdominal fat decreased in the EFC group compared to other groups. Furthermore, there was a significant improvement in the activity of lipase and amylase enzymes (P < 0.05) in the EFC group. Fermented canola meal addition improved gut health (decreased Escherichia coli, increased Lactobacillus, and the highest values of villus height). Overall, these results confirmed that supplementing a fermented canola meal diet with exogenous enzymes improved growth performance through enhancing nutrient digestibility, immunity, antioxidant capacity, and gut health. Thus, adding enzymes to a diet containing fermented canola meal can be recommended as an alternative protein source that could be safely used to replace up to 20% soybean meal in broiler diets.
本研究旨在评估在包含发酵菜籽粕的肉鸡日粮中添加外源酶对生产性能、养分消化率、生化指标、抗氧化能力、消化酶活性、免疫反应和肠道健康的影响。将 500 只 1 日龄 Ross 308 肉鸡随机分为五组（每组 5 个重复），第一组为对照组（CON），含有基础日粮，第二至第五组分别饲喂以下日粮：20%菜籽粕（CM）、20%发酵菜籽粕（FCM）、20%菜籽粕和 0.02%/kg 饲料外源酶（ECM）、20%发酵菜籽粕和 0.02%/kg 饲料外源酶（EFC）。在育肥阶段，与其他组相比，饲喂 EFC 的鸡具有最佳的体重增重、饲料转化率和养分利用率（P<0.05）。EFC 组鸡的总蛋白、白蛋白、丙氨酸氨基转移酶和超氧化物歧化酶水平升高（P<0.05），而胆固醇和丙二醛水平降低。同样，EFC 组鸡的法氏囊相对重量和新城疫抗体滴度显著增加，而腹部脂肪重量降低。此外，EFC 组的脂肪酶和淀粉酶酶活性显著提高（P<0.05）。添加发酵菜籽粕改善了肠道健康（大肠杆菌减少，乳酸菌增加，绒毛高度最高）。总的来说，这些结果证实，在发酵菜籽粕日粮中添加外源酶可通过提高养分消化率、免疫力、抗氧化能力和肠道健康来改善生长性能。因此，在含有发酵菜籽粕的日粮中添加酶可以作为一种替代蛋白质来源，安全地替代肉鸡日粮中高达 20%的豆粕。
