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首页> 外文期刊>Journal of dairy research >Nutritional depletion of total mixed rations by red-winged blackbirds and projected impacts on dairy cow performance
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Nutritional depletion of total mixed rations by red-winged blackbirds and projected impacts on dairy cow performance

机译:红翅黑鸟的营养消耗总量及其对奶牛生产性能的影响

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摘要

This Research Communication describes an investigation of the nutritional depletion of total mixed rations (TMR) by pest birds. We hypothesized that species-specific bird depredation of TMR can alter the nutritional composition of the ration and that these changes can negatively impact the performance of dairy cows. Blackbirds selected the high energy fraction of the TMR (i.e., flaked corn) and reduced starch, crude fat and total digestible nutrients during controlled feeding experiments. For Holsteins producing 37.1 kg of milk/d, dairy production modeling illustrated that total required net energy intake (NE_1) was 35.8 Mcal/d. For the reference TMR unexposed to blackbirds and the blackbird-consumed TMR, NE| supplied was 41.2 and 37.8 Mcal/d, and the resulting energy balance was 5.4 and 2.0 Mcal/d, respectively. Thus, Holsteins fed the reference and blackbird-consumed TMR were estimated to gain one body condition score in 96 and 254 d, and experience daily weight change due to reserves of 1.1 and 0.4 kg/d, respectively. We discuss these results in context of an integrated pest management program for mitigating the depredation caused by pest birds at commercial dairies.
机译:该研究通讯描述了对害虫鸟的总混合日粮(TMR)营养消耗的调查。我们假设,TMR的特定鸟类鸟类捕食会改变口粮的营养成分,并且这些变化会对奶牛的性能产生负面影响。黑鸟在可控的喂养实验中选择了TMR的高能量部分(即玉米片),减少了淀粉,粗脂肪和总可消化营养素。对于每天生产37.1千克牛奶的荷斯坦奶牛来说,乳制品生产模型表明,所需的总净能量摄入量(NE_1)为35.8麦卡尔/天。对于未暴露于黑鸟和消耗黑鸟的TMR的参考TMR,能量供应分别为41.2和37.8麦卡尔/天,产生的能量平衡分别为5.4和2.0麦卡尔/天。因此,据估计,喂食参比和黑鸟食用TMR的荷斯坦牛在96和254 d时获得一项身体状况评分,并且由于储备量分别为1.1和0.4 kg / d而导致每日体重变化。我们将在综合虫害管理计划的背景下讨论这些结果,该计划旨在减轻商业奶牛场中由害虫鸟引起的掠夺。

著录项

  • 来源
    《Journal of dairy research》 |2018年第3期|273-276|共4页
  • 作者单位

    U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado, USA;

    U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado, USA;

    Department of Animal Science, Colorado State University, College of Agricultural Sciences, Fort Collins, Colorado, USA;

    Department of Animal Science, Colorado State University, College of Agricultural Sciences, Fort Collins, Colorado, USA;

    U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado, USA;

    U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado, USA;

    U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Agelaius phoeniceus; dairy production; bird damage management; nutrition;

    机译:凤凰龙乳制品生产;鸟类损害管理;营养;

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