摘要
文章旨在探究复合益生菌(Compound probiotics,CPP)对孙枝鸡生长性能、肉品质及血清免疫指标的影响.试验将 600 只健康、经免疫接种、体重(34.15±1.47)g的 1 日龄孙枝鸡随机分为 4 组,每组 10 个重复,每个重复15 只.试验日粮分别在基础日粮中添加 0、120、240 和 480 mg/kg的CPP,试验为期 120 d.试验结果:在各组孙枝鸡初重一致的基础之上(P＞0.05),与对照组相比,480 mg/kg的CPP组孙枝鸡末重显著上升 7.95%(P＜0.05),料肉比显著下降 3.73%(P＜0.05),240 和 480 mg/kg的CPP组孙枝鸡日增重分别显著上升 4.05%和 8.11%(P＜0.05),采食量分别显著上升 3.98%和 4.08%(P＜0.05).240 和 480 mg/kg的CPP组孙枝鸡血清总蛋白(TP)、球蛋白(GLB)含量显著上升(P＜0.05),肿瘤坏死因子(TNF-α)含量显著下降(P＜0.05),120～480 mg/kg的CPP组免疫球蛋白G(IgG)含量显著上升(P＜0.05),240 mg/kg的CPP组白细胞介素-1β(IL-1β)显著升高(P＜0.05),CPP对白蛋白(Alb)、免疫球蛋白A(IgA)、免疫球蛋白M(IgM)、干扰素γ(IFN-γ)及白细胞介素 10(IL-10)含量未产生显著影响(P＞0.05).240 和 480 mg/kg的CPP组肉鸡胸肌的a*值显著上调(P＜0.05),腿肌L*值显著下调(P＜0.05),a*值显著上调(P＜0.05),120～480 mg/kg的CPP组腿肌剪切力显著下调(P＜0.05).试验结论:添加 480 mg/kg能促进孙枝鸡生长发育,增强免疫力并改善肉质.
Abstract
To investigate the effects of compound probiotics(CPP)on the growth performance,meat quality,and serum immune indicators of Sunzhi chicken.Select 600 healthy,immunized 1-day-old Sunzhi chickens(34.15±1.47 g)and randomly divide them into 4 groups,with 10 replicates in each group and 15 chickens per replicate.Each group was fed with experimental feed containing basic feed+0,120,240,and 480 mg/kg CPP for a total of 120 days.On the basis of consistent initial weight among all groups of Sunzhi chickens(P＞0.05),compared with the control group,the final weight of Sunzhi chickens in the 480 mg/kg CPP group increased by 7.95%(P＜0.05),and the feed to meat ratio decreased by 3.73%(P＜0.05).The daily weight gain of Sunzhi chickens in the 240 and 480 mg/kg CPP groups significantly increased by 4.05%and 8.11%(P＜0.05),respectively,and the feed intake significantly increased by 3.98%and 4.08%(P＜0.05),respectively.The serum TP and GLB levels of Sunzhi chickens in the CPP groups of 240 and 480 mg/kg significantly increased(P＜0.05),while the TNF-α levels significantly decreased(P＜0.05).The IgG levels in the CPP groups of 120-480 mg/kg significantly increased(P＜0.05),and the IL-1 β levels in the CPP group of 240 mg/kg significantly increased(P＜0.05).CPP did not have a significant effect on the levels of Alb,IgA,IgM,IFN-γ,and IL-10(P＞0.05).The a * value of chest muscle in broiler chickens was significantly upregulated(P＜0.05)at 240 and 480 mg/kg CPP groups,while the L * value of leg muscle was significantly downregulated(P＜0.05),and the a * value was significantly upregulated(P＜0.05).The shear force of leg muscle was significantly downregulated(P＜0.05)at 120-480 mg/kg CPP groups.(Experimental conclusion)Adding 480 mg/kg can promote the growth and development of Sunzhi chickens,enhance immunity,and improve meat quality.
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