激素类型和浓度各异的合成代谢植入物会影响安格斯种公牛的生长性能、采食行为、胴体特征、血浆微量矿物质浓度以及肝脏微量矿物质浓度。

Anabolic Implants Varying in Hormone Type and Concentration Influence Performance, Feeding Behavior, Carcass Characteristics, Plasma Trace Mineral Concentrations, and Liver Trace Mineral Concentrations of Angus Sired Steers.

作者信息

Reichhardt Caleb C, Messersmith Elizabeth M, Brady Tevan J, Motsinger Laura A, Briggs Reganne K, Bowman Brett R, Hansen Stephanie L, Thornton Kara J

机构信息

Department of Animal, Dairy and Veterinary Science, Utah State University, Logan, UT 84322, USA.

Department of Animal Science, Iowa State University, Ames, IA 50011, USA.

出版信息

Animals (Basel). 2021 Jun 30;11(7):1964. doi: 10.3390/ani11071964.

Fifty Angus-sired steers were utilized to evaluate the effects of anabolic implants varying in hormone type and concentration on performance, carcass traits, and plasma and liver trace mineral concentrations over 129 d. Steers were stratified by weight into one of four ( = 12 or 13/treatment) implant treatments: (1) estradiol (E2; 25.7 mg E2; Compudose, Elanco Animal Health, Greenfield, IN, USA), (2) trenbolone acetate (TBA; 200 mg TBA; Finaplix-H, Merck Animal Health, Madison, NJ, USA), (3) combination implant (ETBA; 120 mg TBA + 24 mg E2; Revalor-S, Merck Animal Health), or (4) no implant (CON). Steers were randomly assigned to pens equipped with GrowSafe bunks and fed a corn and barley-based finishing ration. Overall average daily gain and body weight were greater for ETBA and TBA than CON ( ≤ 0.04), but not E2 ( ≥ 0.12). Feed efficiency and hot carcass weight were only greater than CON for ETBA ( ≤ 0.03). Plasma and d 2 liver Zn concentrations were lesser for ETBA than CON ( ≤ 0.01) and d 10 liver Mn was lesser ( = 0.0003) for TBA than CON. These data indicate that implants containing TBA influence growth and trace mineral parameters, though more work investigating this relationship is necessary.

选用50头安格斯种公牛来评估不同激素类型和浓度的合成代谢植入物对129天内生长性能、胴体性状、血浆和肝脏微量元素浓度的影响。根据体重将公牛分为四种植入物处理组之一（每组12或13头）：（1）雌二醇（E2；25.7毫克E2；Compudose，美国伊利诺伊州格林菲尔德市伊兰科动物保健公司），（2）醋酸群勃龙（TBA；200毫克TBA；Finaplix-H，美国新泽西州麦迪逊市默克动物保健公司），（3）联合植入物（ETBA；120毫克TBA + 24毫克E2；Revalor-S，默克动物保健公司），或（4）不植入（CON）。将公牛随机分配到配备GrowSafe饲槽的栏舍中，饲喂以玉米和大麦为基础的育肥牛日粮。ETBA组和TBA组的总体平均日增重和体重均高于CON组（P≤0.04），但E2组无差异（P≥0.12）。仅ETBA组的饲料效率和热胴体重高于CON组（P≤0.03）。ETBA组的血浆和第2天肝脏锌浓度低于CON组（P≤0.01），TBA组第10天肝脏锰浓度低于CON组（P = 0.0003）。这些数据表明，含TBA的植入物会影响生长和微量元素参数，不过还需要更多研究来探究这种关系。