黄芪多糖对高温季节荷斯坦公牛养分表观消化率和血清免疫指标的影响  

Effect of Astragalus polysaccharides on apparent digestibility of nutrients,serum antioxidant and immune indexes of Holstein bulls in high temperature season

作　　者：侯路钊 李树静 张秀江 肖阳 梁英杰 曹玉凤[1] 刘观忠[1] 李秋凤[1] HOU Lu-zhao;LI Shu-jing;ZHANG Xiu-jiang;XIAO Yang;LIANG Ying-jie;CAO Yu-feng;LIU Guan-zhong;LI Qiu-feng

机构地区：[1]河北农业大学动物科技学院,河北保定071001 [2]河北天和肉牛养殖有限公司,河北石家庄050000 [3]保定农业农村局,河北保定071001 [4]河北燕城食品有限公司,河北保定072650 [5]定兴县动物疫病预防控制中心,河北保定072650

出　　处：《饲料研究》2022年第9期1-4,共4页Feed Research

基　　金：财政部和农业农村部“国家现代农业产业技术体系资助(项目编号:CARS-37)”;河北省重点研发(项目编号:19226615D);河北省二期现代农业产业技术体系肉牛创新团队高效养殖岗位建设项目(项目编号:HBCT2018130202)。

摘　　要：试验旨在研究黄芪多糖(APS)对高温季节荷斯坦公牛养分表观消化率及血清免疫指标的影响。选取48头体重(313.75±13.55)kg、体况良好的荷斯坦公牛,随机分为4组,每组12个重复,每个重复1头牛。对照组为基础日粮,试验Ⅰ组、Ⅱ组、Ⅲ组在基础日粮中分别添加8、16、24 g/(头·d)APS。预试期7 d,正式试验期60 d。结果显示:日粮添加APS以及添加时间均显著提高干物质(DM)、粗蛋白(CP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、磷(P)的表观消化率(P<0.05),且两者间存在交互作用(P<0.05)。试验第30 d,试验组公牛的养分表观消化率显著高于对照组(P<0.05);Ⅱ组公牛的CP含量显著高于Ⅰ组和Ⅲ组(P<0.05);Ⅰ组和Ⅱ组公牛的NDF表观消化率著高于Ⅲ组(P<0.05);Ⅱ组公牛Ca的表观消化率显著高于Ⅰ组和Ⅲ组(P<0.05)。试验第60 d,Ⅰ组公牛的DM、CP、ADF和P表观消化率显著高于对照组(P<0.05)。试验第60 d,Ⅱ组公牛血清免疫球蛋白G(IgG)含量比对照组提高49.69%(P<0.05),比Ⅰ组提高43.48%(P<0.05);Ⅲ组公牛血清IgG比对照组提高47.18%(P<0.05)。研究表明,日粮添加8~16 g/(头·d)能够有效提高高温季节荷斯坦公牛养分表观消化率,改善免疫性能。The experiment was conducted to investigate the effect of Astragalus polysaccharides on nutrient apparent digestibility and serum immune indexes of Holstein bulls in high temperature season.48 healthy Holstein bulls with body weight of(313.75±13.55)kg were randomly divided into four groups,with 12 replicates in each group and one bull in each replicate.The bulls in control group were fed with a basal diet,and the APS supplemental levels in groupⅠ,groupⅡand groupⅢwere 8,16 and 24 g/(head·d),respectively.The pre-experiment lasted for 7 d,and the formal experiment lasted for 60 d.The results showed that the addition of APS in diet and the addition time had significant effect on apparent digestibility of DM,CP,NDF,ADF,and P(P<0.05).On the 30th day,the nutrient apparent digestibility of experimental group was significantly higher than that of control group(P<0.05),CP in groupⅡwas significantly higher than that in groupⅠand group Ⅲ(P<0.05),the NDF of bulls in groupⅠand groupⅡwas higher than that in group Ⅲ(P<0.05),and the Ca digestibility of bulls in groupⅡwas significantly higher than that in groupⅠand groupⅢ(P<0.05).On the 60th day,the apparent digestibility of DM,CP,ADF and P in groupⅠwas significantly higher than that in control group(P<0.05).On the 60th day of experiment,the content of serum IgG in groupⅡwas 49.69%higher than that in control group(P<0.05),and 43.48%higher than that in groupⅠ(P<0.05).The content of serum IgG in groupⅢwas 47.18%higher than that in control group(P<0.05).The experiment indicates that dietary supplementation of 8 to 16 g/(head·d)can effectively increase nutrient apparent digestibility and improve immune performance of Holstein bulls in high temperature season.

关 键 词：黄芪多糖 热应激 荷斯坦公牛 表观消化率 免疫 

分 类 号：S823[农业科学—畜牧学]