Chen Hong, Liu Weixin, Zhang Hao, Yan Yibo, Chen Meiqi, Ding Xiaoling, Zhang Cheng, Jiang Runsheng, Wang Zaigui
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230031, China.
College of Life Science and Technology, Anhui Agricultural University, Hefei 230031, China.
Animals (Basel). 2024 Dec 18;14(24):3650. doi: 10.3390/ani14243650.
The purpose of this experiment is to investigate how different doses of powder affect the growth performance, carcass quality, serum biochemical indexes, serum antioxidant and immunological index, intestinal morphology, and digestive enzyme activity of broilers. Four hundred chicks of a similar weight (1 day old) are randomly assigned to four groups of five replicates of 20 chicks each (half males and half females). The control group is fed a basal ration, and the experimental groups T1, T2, and T3 are supplemented with 6.0 × 10 CFU/kg, 1.2 × 10 CFU/kg, and 1.8 × 10 CFU/kg of bacterial powder, respectively, in the basal ration. The feeding cycle is 52 d. Compared with the control group, powder (1) increases the broiler feed conversion ratio (FCR) ( < 0.05), (2) improves the carcass quality (slaughter rate, cooking loss, L* and b* values) ( < 0.05), (3) enhances the serum biochemical indexes (alanine transaminase (ALT), alkaline phosphatase (ALP), aspartate transaminase (AST), albumin (ALB), and triglycerides (TG)) ( < 0.05), (4) improves the serum antioxidant capacity (total an-tioxidant capacity (T-AOC), total superoxide dismutase (T-SOD), and glutathione peroxidase (GSH-PX)) and immunoglobulins (lg A, lg G, lg M) ( < 0.05), (5) improves the intestinal morphology (villus height and villus height to crypt depth (VCR)) ( < 0.05), and (6) increases the intestinal digestive enzyme activities (amylase, protease, and lipase) ( < 0.05). In summary, adding to broiler diets can result in a significant decrease in broilers' FCR, an increase in their slaughtering rate, a decrease in their serum ALT, ALP, and AST activities, an increase in their serum TG content, an improvement of their immune and antioxidant capacity, an improvement of their intestinal morphology, and an improvement of their intestinal digestive enzyme activity. It is recommended to add 1.8 × 10 CFU/kg of bacteria.
本实验的目的是研究不同剂量的菌粉如何影响肉鸡的生长性能、胴体品质、血清生化指标、血清抗氧化和免疫指标、肠道形态以及消化酶活性。400只体重相近（1日龄）的雏鸡被随机分为四组，每组五个重复，每组20只雏鸡（雌雄各半）。对照组饲喂基础日粮，实验组T1、T2和T3分别在基础日粮中添加6.0×10CFU/kg、1.2×10CFU/kg和1.8×10CFU/kg的菌粉。饲养周期为52天。与对照组相比，菌粉（1）提高了肉鸡的饲料转化率（FCR）（P<0.05），（2）改善了胴体品质（屠宰率、蒸煮损失、L和b值）（P<0.05），（3）提高了血清生化指标（丙氨酸转氨酶（ALT）、碱性磷酸酶（ALP）、天冬氨酸转氨酶（AST）、白蛋白（ALB）和甘油三酯（TG））（P<0.05），（4）提高了血清抗氧化能力（总抗氧化能力（T-AOC）、总超氧化物歧化酶（T-SOD）和谷胱甘肽过氧化物酶（GSH-PX））以及免疫球蛋白（IgA、IgG、IgM）（P<0.05），（5）改善了肠道形态（绒毛高度和绒毛高度与隐窝深度之比（VCR））（P<0.05），（6）提高了肠道消化酶活性（淀粉酶、蛋白酶和脂肪酶）（P<0.05）。综上所述，在肉鸡日粮中添加菌粉可显著降低肉鸡的FCR，提高其屠宰率，降低其血清ALT、ALP和AST活性，提高其血清TG含量，改善其免疫和抗氧化能力，改善其肠道形态，提高其肠道消化酶活性。建议添加1.8×10CFU/kg的菌粉。
