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首页> 外文期刊>Meat Science >Effect of ractopamine hydrochloride (Optaflexx) dose on live animal performance, carcass characteristics and tenderness in early weaned beef steers
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Effect of ractopamine hydrochloride (Optaflexx) dose on live animal performance, carcass characteristics and tenderness in early weaned beef steers

机译：盐酸莱克多巴胺剂量（Optaflexx）对早期断奶牛肉公牛活体动物生产性能，car体特性和嫩度的影响

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摘要

Study objectives were to evaluate ractopamine hydrochloride's (RAC) effect on performance, carcass characteristics, and tenderness of early weaned beef steers. Steers were assigned to a control diet (0 mg RAC·steer~(-1) ·d~(-1)), 200 mg RAC mg·steer~(-1)·d(-1), or 300 mg RAC·steer~(-1)·d~(-1). Steers fed 200 and 300mgRAC·steer~(-1)·d~(-1) gained 14.84kg and 14.57 kg more live weight and produced 13.22 and 14.90 kg more hot carcass weight, respectively, than controls. Feed conversions for steers fed 200 or 300 mg RAC·steer~(-1)·d~(-1) of RAC increased 45.2% and 47.3% and average daily gain increased 55.5% and 54.5% compared to controls, respectively. Feeding either dose of RAC increased (P<0.05) loin muscle area and increased (P<0.05) Warner-Bratzler shear force (WBSF) values compared to controls, however the magnitude of WBSF difference diminished (P>0.05) over 14 days of postmortem aging. Results of this study confirm that RAC increases weight gain and feed efficiency, minimally impacts carcass quality and has manageable impacts on tenderness when fed at either 200 or 300 mg steer~(-1) -d~(-1).
机译：研究目标是评估盐酸莱克多巴胺（RAC）对早期断奶牛肉公牛性能，car体特性和嫩度的影响。将ers牛皮指定为对照饮食（0 mg RAC·steer〜（-1）·d〜（-1）），200 mg RAC毫克·steer〜（-1）·d（-1）或300 mg RAC·转向〜（-1）·d〜（-1）。饲喂200和300mg RAC·steer〜（-1）·d〜（-1）的ers牛比对照组分别增加了14.84kg和14.57kg的活重，并增加了13.22和14.90kg的hot体热重。与对照组相比，饲喂200或300毫克RAC·ste _（-1）·d〜（-1）的ste牛皮的饲料转化率分别提高了45.2％和47.3％，平均日增重分别达到55.5％和54.5％。与对照组相比，饲喂任一剂量的RAC都会增加（P <0.05）腰部肌肉面积并增加（P <0.05）Warner-Bratzler剪切力（WBSF）值，但是WBSF差异在14天内减少了（P> 0.05）。验尸老化。这项研究的结果证实，当以200或300 mg转向〜（-1）-d〜（-1）饲喂时，RAC可以增加增重和饲料效率，对car体品质的影响最小，并且对嫩度具有可控的影响。

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  • 来源
    《Meat Science》 |2012年第4期|p.458-463|共6页
  • 作者

    D.D. Boler; A.L. Shreck; D.B. Faulkner; J. Killefer; F.K. McKeith; J.W. Homm; J.A. Scanga;

  • 作者单位

    epartment of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Lab, 1503 S. Maryland Drive, Urbana, IL 61801, USA,Department of Animal Sciences, The Ohio State University. Columbus, OH 43210, USA;

    epartment of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Lab, 1503 S. Maryland Drive, Urbana, IL 61801, USA,Department of Animal Science, University of Nebraska, Lincoln, NE 68583, USA;

    epartment of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Lab, 1503 S. Maryland Drive, Urbana, IL 61801, USA;

    epartment of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Lab, 1503 S. Maryland Drive, Urbana, IL 61801, USA,Department of Animal Sciences, Oregon State University, Corvallis, OR 97331, USA;

    epartment of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Lab, 1503 S. Maryland Drive, Urbana, IL 61801, USA;

    Elanco Animal Health, A Division of Eli Lilly and Company, Greenfield, IN 46140, USA;

    Elanco Animal Health, A Division of Eli Lilly and Company, Greenfield, IN 46140, USA;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    beef; early weaned steer; optaflexx; ractopamine hydrochloride; tenderness;

    机译：牛肉;早期断奶的;牛;optaflexx;盐酸莱克多巴胺;压痛;

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