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Related Experiment Videos

Wind protection effects and airflow patterns in outside feedlots

T L Mader1, J M Dahlquist, J B Gaughan

  • 1Department of Animal Science, University of Nebraska, Concord 68728, USA.

Journal of Animal Science
|January 1, 1997
PubMed
Summary

Providing shelter for cattle did not improve winter performance but decreased summer gains. Cattle in unprotected lots had increased fat thickness and marbling, suggesting moderate cold stress enhances fat deposition.

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Area of Science:

  • Animal Science
  • Agricultural Engineering
  • Environmental Science

Background:

  • Shelter and windbreaks are commonly used in livestock production to mitigate environmental stressors.
  • The impact of shelter on cattle performance, particularly during different seasons, requires further investigation.

Purpose of the Study:

  • To evaluate the effects of different levels of shelter and wind protection on the performance and carcass characteristics of feedlot steers.
  • To determine the influence of environmental conditions on dry matter intake (DMI) and feed:gain ratios across seasons.

Main Methods:

  • Steers were finished in three types of outside lots: sheltered, partially sheltered (shelterbelt), and unsheltered.
  • Performance data, including weight gain, dry matter intake, and feed:gain ratios, were collected over a three-year period.

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  • Carcass data, such as fat thickness and marbling scores, were analyzed in conjunction with environmental factors like wind velocity.

    • Main Results:

    • Shelter did not improve winter performance but led to decreased cattle gains in the summer.
    • Cattle in unprotected lots exhibited greater winter fat thickness and improved marbling scores in winter and autumn.
    • Seasonal variations significantly affected DMI and feed:gain ratios, with autumn showing the highest DMI.

    Conclusions:

    • In Nebraska's climate, potential winter benefits of shelter may be negated by reduced summer performance.
    • Moderate cold stress in unprotected environments appears to enhance fat deposition in feedlot cattle.
    • Environmental management strategies should consider seasonal impacts on cattle performance and carcass quality.