乳酸菌素对犊牛生长性能、腹泻率、血清免疫及瘤胃发酵参数的影响  

The effects of lactobacillus on growth performance,diarrhea rate,serum immunity,and rumen fermentation parameters of calves

作　　者：李丽莉 郭辉 林波[3] 李影球[1] 裴朝东[1] 周剑新[1] LI Lii;GUO Hui;LIN Bo;LI Yingqiu;PEI Chaodong;ZHOU Jianxin(Guangxi Polytechnic of Industry and Commerce,Nanning,Guangxi Province 530001,China;Guangxi Muxing Biotechnology Co,LTD,Nanning,Guangxi Province 530001,China;College of Animal Science and Technology,Guangxi University,Nanning,Guangxi Province 530005,China)

机构地区：[1]广西工商职业技术学院,广西南宁530001 [2]广西牧兴生物科技有限公司,广西南宁530001 [3]广西大学动物科技学院,广西南宁530005

出　　处：《中国饲料》2024年第16期33-36,共4页China Feed

基　　金：广西教育科学规划课题(2022ZJY2256)。

摘　　要：文章旨在研究乳酸菌素对犊牛生长性能、腹泻率、血清免疫及瘤胃发酵参数的影响。以100d左右,发育状况良好且体重相近的公犊为试验对象,共分4组,各组犊牛在基础日粮中分别添加0%、0.1%、0.2%、0.3%的乳酸菌素,每组3个重复,每个重复5头,共计60头犊牛。预饲期10d,正试期60d。结果 :(1)与饲喂基础日粮(乳酸菌素添加水平为0%)相比,乳酸菌素添加水平为0.2%时,犊牛末重、平均日增重显著提高(P<0.05),料重比显著降低(P<0.05)。不同乳酸菌素添加水平均显著降低了犊牛腹泻率(P<0.05)。(2)与饲喂基础日粮(乳酸菌素添加水平为0%)相比,乳酸菌素添加水平为0.2%、0.3%时,犊牛血清中免疫球蛋白G、白介素-4含量显著提高(P<0.05)。不同乳酸菌素添加水平均显著提高了犊牛血清中免疫球蛋白A含量(P<0.05),显著降低了犊牛血清中肿瘤坏死因子-α含量(P<0.05)。(3)与饲喂基础日粮(乳酸菌素添加水平为0%)相比,乳酸菌素添加水平为0.2%、0.3%时,瘤胃pH值显著降低(P<0.05),总挥发性脂肪酸、乙酸含量以及乙丙比显著提高(P<0.05)。不同乳酸菌素添加水平均显著提高了瘤胃氨态氮含量(P<0.05)。结论 :基础日粮中添加不同水平乳酸菌素均能提高犊牛生长性能,降低腹泻率,且有效改善血清免疫力和瘤胃发酵参数。在本试验条件下,乳酸菌素的适宜添加水平为0.2%。This experiment aims to investigate the effects of lactobacillus on the growth performance,diarrhea rate,serum immunity,and rumen fermentation parameters of calves.Male calves with good developmental status and similar weight after about 100 days were selected as the experimental subjects and divided into 4 groups.Each group of calves was supplemented with 0%,0.1%,0.2%,and 0.3%lactobacilli in the basic diet,with 3 replicates in each group,5 calves in each replicate,for a total of 60 calves.The pre trial period is 10 days,and the main trial period is 60 days.Result:(1)Compared with the basal diet(with a lactobacillus addition level of 0%),when the lactobacillus addition level was 0.2%,the final weight and average daily weight gain of calves were significantly increased(P<0.05),and the feed to weight ratio was significantly reduced(P<0.05).Different levels of lactobacillus addition significantly reduced the diarrhea rate of calves(P<0.05).(2)Compared with the basal diet(with 0%lactobacillus addition level),the levels of immunoglobulin G and interleukin-4 in calf serum were significantly increased at 0.2%and 0.3%lactobacillus addition levels(P<0.05).Different levels of lactobacillus addition significantly increased the content of immunoglobulin A in calf serum(P<0.05)and significantly reduced tumor necrosis factor in calf serum-αContent(P<0.05).(3)Compared with the basal diet(with a lactobacillus addition level of 0%),when the lactobacillus addition levels were 0.2%and 0.3%,the pH value significantly decreased(P<0.05),and the total volatile fatty acid,acetic acid content,and ethylene to propylene ratio significantly increased(P<0.05).Different levels of lactobacillus addition significantly increased the ammonia nitrogen content(P<0.05).Conclusion:Adding different levels of lactobacillus to the basic diet can improve the growth performance of calves,reduce diarrhea rate,and effectively improve serum immunity and rumen fermentation parameters.Under the conditions of this experiment,the appropriate level of lactobacil

关 键 词：乳酸菌素 犊牛 生长性能 腹泻率 血清免疫 瘤胃发酵参数 

分 类 号：S816.7[农业科学—饲料科学]