摘要
本试验旨在探究万寿菊黄酮对热应激肉牛生长性能、营养物质表观消化率及血清抗氧化和免疫指标的影响。选取健康无病的西门塔尔公牛60头,按照体重[(518.32±25.59)kg]相近原则,随机分为4组,每组15头。对照组(M0组)饲喂全混合日粮(TMR),试验组在TMR基础上分别添加3(M3组)、6(M6组)和9 g/(d·头)(M9组)的万寿菊黄酮。试验期共67 d,其中预试期7 d,正试期60 d。试验期间平均温湿度指数为80.06,肉牛处于中度热应激状态。结果表明:1)与M0组相比,M6组第40天呼吸频率显著降低(P<0.05)。2)与M0组相比,M3和M6组平均日增重(ADG)显著提高(P<0.05),料重比(F/G)显著降低(P<0.05)。3)第60天时,与M0组相比,M6和M9组干物质(DM)表观消化率显著升高(P=0.05),M6组粗蛋白质(CP)表观消化率显著升高(P<0.05),M3和M6组钙(Ca)和磷(P)表观消化率显著升高(P≤0.05)。4)第60天时,与M0组相比,M3和M6组血清丙二醛(MDA)含量显著降低(P<0.05),M6组血清总抗氧化能力(T-AOC)显著升高(P=0.05)。5)第60天时,与M0组相比,M3、M6和M9组血清免疫球蛋白A(IgA)和白细胞介素-2(IL-2)含量显著升高(P<0.05),M6组血清肿瘤坏死因子-α(TNF-α)含量显著降低(P<0.05)。综上所述,饲粮中添加万寿菊黄酮可有效降低热应激肉牛的呼吸频率,改善生长性能,增强机体的抗氧化能力和免疫功能,且以添加6 g/(d·头)的万寿菊黄酮效果最佳。
This experiment was conducted to investigate the effects of marigold flavonoids on growth performance,nutrient apparent digestibility,serum antioxidant and immune indices of heat stressed beef cattle.Sixty healthy Simmental bulls without disease were randomly divided into 4 groups with 15 bulls per group according to the principle of similar body weight[(518.32±25.59)kg].The control group(M0 group)was fed a total mixed ration(TMR),and the experimental groups were fed the TMR supplemented with 3(M3 group),6(M6 group)and 9 g/(d·head)(M9 group)marigold flavonoids,respectively.The experiment lasted for a total of 67 days,including 7 days of pre-feeding and 60 days of formal feeding.The average temperature and humidity index was 80.06 during the experiment,and beef cattle were in a state of moderate heat stress.The results showed as follows:1)compared with M0 group,the respiratory rate of M6 group on day 40 was significantly decreased(P<0.05).2)Compared with M0 group,the average daily gain(ADG)of M3 and M6 groups was significantly increased(P<0.05),and the ratio of feed to gain(F/G)was significantly decreased(P<0.05).3)On day 60,compared with M0 group,the dry matter(DM)apparent digestibility of M6 and M9 groups was significantly increased(P=0.05),the crude protein(CP)apparent digestibility of M6 group was significantly increased(P<0.05),and the calcium(Ca)and phosphorus(P)apparent digestibility of M3 and M6 groups was significantly increased(P≤0.05).4)On day 60,compared with M0 group,the serum malondialdehyde(MDA)content of M3 and M6 groups was significantly decreased(P<0.05),and the serum total antioxidant capacity(T-AOC)of M6 group was significantly increased(P=0.05).5)On day 60,compared with M0 group,the contents of immunoglobulin A(IgA)and interleukin-2(IL-2)in serum of M3,M6 and M9 groups were significantly increased(P<0.05),and the serum tumor necrosis factor-α(TNF-α)content of M6 group was significantly decreased(P<0.05).In conclusion,dietary supplementation of marigold flavonoids can effectively reduce the respiratory rate of heat-stressed beef cattle,improve growth performance,enhance the body antioxidant capacity and immune function,and the supplementation of 6 g/(d·head)marigold flavonoids has the best effect.
作者
于晓梦
田雨晴
林笑乾
吴春会
赵超
张秀江
李素霞
王明亚
李秋凤
YU Xiaomeng;TIAN Yuqing;LIN Xiaoqian;WU Chunhui;ZHAO Chao;ZHANG Xiujiang;LI Suxia;WANG Mingya;LI Qiufeng(College of Animal Science and Technology,Hebei Agricultural University,Baoding 071000,China;Baoding Agricultural and Rural Bureau,Baoding 071051,China;Chengde Animal Husbandry Workstation,Chengde 067000,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2024年第9期5736-5747,共12页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
河北省三期现代农业产业技术体系肉牛创新团队本地饲料资源开发和绿色养殖建设项目(HBCT2023190203)
菊粉在肉牛绿色养殖中的应用技术研究(202304B055)。
关键词
万寿菊
黄酮
肉牛
热应激
营养物质表观消化率
抗氧化
免疫
marigold
flavonoids
beef cattle
heat stress
nutrient apparent digestibility
antioxidant
immune
