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Compositional Variations in Wheat Bran Influence Growth Performance, Nutrient Retention, and Cecal Microbiome in

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  • 1The State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.

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Summary

Low-fiber wheat bran improved nutrient digestion and gut health in broilers. High-fiber wheat bran negatively impacted growth performance and nutrient digestibility in broiler chickens. This study highlights the importance of wheat bran composition for broiler nutrition.

Keywords:
broilercecal microbiotachemical compositiontotal tract metabolizability of nutrientswheat bran

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Area of Science:

  • Animal Science
  • Poultry Nutrition
  • Gut Health

Background:

  • Wheat bran is a valuable feed ingredient for broilers, known to stimulate digestive development and improve fiber digestibility.
  • However, wheat bran's nutritional composition varies significantly, potentially impacting its efficacy.

Purpose of the Study:

  • To investigate the influence of different wheat bran types on broiler growth performance, nutrient digestion, and gut health.
  • To categorize wheat bran based on its fiber content and analyze its impact on broiler chickens.

Main Methods:

  • Eight wheat bran types were analyzed for nine constituents and clustered into low-fiber (LF), medium-fiber (MF), and high-fiber (HF) groups using principal component analysis.
  • A feeding trial with 324 broiler chicks evaluated diets supplemented with 3% LF, MF, or HF wheat bran until 21 days of age.
  • Growth performance, nutrient digestibility, and cecal microbiota were assessed.

Main Results:

  • High-fiber (HF) wheat bran increased the feed/gain ratio and reduced dry matter, gross energy digestion, and energy and crude protein (CP) retention.
  • Low-fiber (LF) wheat bran enhanced CP and neutral detergent fiber (NDF) digestion coefficients without negatively affecting nutrient retention.
  • LF wheat bran supplementation led to an enrichment of Barnesiella in the cecal digesta, while MF wheat bran enriched Lachnospiracea.

Conclusions:

  • Wheat bran type significantly influences broiler performance and gut health.
  • Low-fiber wheat bran shows potential for improving protein and fiber digestion and modulating gut microbiota in broilers.
  • Careful selection of wheat bran based on its fiber content is crucial for optimizing broiler nutrition and health.