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Related Experiment Videos

Nutritional methods to decrease N losses from open-dirt feedlots in Nebraska.

G E Erickson1, T J Klopfenstein

  • 1Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA. geericks@unlnotes.unl.edu

Thescientificworldjournal
|June 14, 2003
PubMed
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Feeding cattle diets with added corn bran reduced nitrogen losses in feedlots during cooler months. This nutritional strategy offers economic and environmental benefits by decreasing valuable nitrogen loss.

Area of Science:

  • Animal Science
  • Environmental Science
  • Nutritional Science

Background:

  • Nitrogen (N) losses from cattle feedlots contribute to environmental pollution and economic losses.
  • Nutritional management offers a cost-effective approach to mitigate N losses compared to direct carbon (C) amendments.
  • Increasing the carbon-to-nitrogen (C:N) ratio in feedlot manure is a key strategy to reduce N volatilization.

Purpose of the Study:

  • To evaluate the impact of feeding corn bran, a less digestible ingredient, on nitrogen losses in cattle feedlots.
  • To determine if varying levels of corn bran (0, 15, or 30% of diet) affect nutrient excretion and feed efficiency.
  • To assess the seasonal influence on the effectiveness of dietary corn bran in reducing nitrogen losses.

Main Methods:

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  • Three experiments were conducted using cattle fed diets containing 0, 15, or 30% corn bran.
  • Organic matter (OM) excretion and feed efficiency were measured for each dietary treatment.
  • Nitrogen (N) balance was assessed across different seasons (October-May and June-September).

    • Main Results:

    • Diets with 15% and 30% corn bran increased organic matter excretion by 0.5 and 1.0 kg/steer/day, respectively.
    • Feed efficiency decreased by 7.8% and 10.4% for the 15% and 30% bran diets, respectively.
    • Nitrogen losses were reduced by 14.5% and 20.7% with 15% and 30% bran diets, respectively, during cooler months (October-May), but not during warmer months (June-September).

    Conclusions:

    • Feeding corn bran as a less digestible component in cattle diets can effectively reduce nitrogen losses during cooler periods.
    • The strategy of increasing dietary fiber through corn bran shows potential for economic and environmental benefits in feedlot management.
    • Seasonal variations significantly impact the efficacy of dietary modifications for nitrogen loss mitigation in feedlots.