Influence of particle size and xylanase in corn-soybean pelleted diets on performance, nutrient utilization, microbiota and short-chain fatty acid production in young broilers

Diego Melo-Durán, José Francisco Pérez, Gemma González-Ortiz, Roser Sala, Sandra Villagómez-Estrada, Michael R. Bedford, Hadden Graham, David Solà-Oriol*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The objective of this study was to investigate the effects of particle size and xylanase supplementation in corn-based pellet diets on the performance and digestive traits in young broilers. A total of 512 male Ross 308 broilers were used in a 21-day study. The treatments were designed in a 4 × 2 factorial arrangement with four levels of geometric mean diameter (Dgw) of corn (540, 660, 1390, and 1700 µm), and two levels of xylanase (0 or 16,000 BXU/kg diet). Feeding coarse corn diets (1390 and 1700 µm Dgw) and xylanase supplementation showed an inferior coefficient of variation of body weight. Higher gizzard weight, microbiome alpha-diversity, and clustered separately beta-diversity (p < 0.05) were observed in birds fed coarse diets. The addition of xylanase promoted changes in relative bacteria abundance, increasing Lachnospiraceae, Defluviitaleaceae, Bacteroidaceae, Bacillaceae, Eggerthellaceae, and Streptococcaceae families in the 1700 µm group, and Christensenellaceae and Lachnospiraceae families in the 540 µm Dgw group. In conclusion, xylanase supplementation and particle size of corn interact in the intestinal environment, showing changes in microbial composition. Coarse diets and xylanase supplementation showed improved body weight homogeneity, which might be related to a better gut development and microbiota modulation.

Original languageAmerican English
Article number1904
Pages (from-to)1-22
Number of pages22
JournalAnimals
Volume10
Issue number10
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Microbiota
  • Nutrient digestibility
  • Particle size
  • Short-chain fatty acids
  • Xylanase

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