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Symposium review: Technologies for improving fiber utilization.

A T Adesogan1, K G Arriola1, Y Jiang1

  • 1Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611.

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|April 1, 2019
PubMed
Summary
This summary is machine-generated.

Improving dairy cow nutrition involves enhancing forage fiber utilization. Technologies like genetic modification (brown midrib mutants) and biological treatments show promise for increasing nutrient and energy availability from feed.

Keywords:
cowdigestionfibertechnology

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Area of Science:

  • Ruminant nutrition
  • Forage science
  • Agricultural biotechnology

Background:

  • Lignocellulosic complex in forage limits nutrient and energy utilization by dairy cows.
  • Developing technologies to enhance forage fiber utilization is crucial for improving dairy cow diets.

Purpose of the Study:

  • To review and summarize various technologies aimed at increasing forage fiber utilization in dairy cows.
  • To assess the efficacy, practicality, and limitations of different physical, genetic, chemical, and biological approaches.

Main Methods:

  • Review of physical processing techniques (particle size reduction).
  • Analysis of genetic strategies (brown midrib mutants).
  • Evaluation of chemical treatments (alkalis, urea, ammonia-fiber expansion).
  • Assessment of biological methods (enzymes, yeasts, fungi).

Main Results:

  • Physical processing increases intake and surface area for microbial action.
  • Brown midrib mutants offer repeatable improvements in fiber utilization.
  • Chemical treatments like ammoniation increase digestibility and nitrogen content, but face adoption barriers.
  • Biological treatments show positive overall effects, especially with synergistic agents like expansin-like proteins.
  • Further research is needed for on-farm applicability and cost-effectiveness.

Conclusions:

  • Multiple technologies exist to improve forage fiber utilization in dairy cows.
  • Genetic and biological approaches show significant potential, with ongoing research addressing limitations.
  • Optimizing these technologies is key to enhancing nutrient and energy availability from forage.