Type: Chapter

Advances in understanding and improving the use of enzymes in broiler nutrition

Authors

Tanner L. Wise

Purdue University

Jung Yeol Sung

Purdue University

Olayiwola Adeola

Purdue University

Publication date:

18 September 2024

ID: 9781835452400

E-Chapter format

£25.00
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Description

The supplementation of exogenous enzymes in diets is a common practice in the poultry industry. Different enzymes are used to target specific substrates: phytase acts on phytate, protease acts on proteins of peptides, xylanase acts on arabinoxylan, and amylase acts on starch. The utilization of these enzymes results in the release of target substrate hydrolysis endproducts, leading to enhanced digestibility and improved growth performance. Moreover, the introduction of these enzymes has facilitated the inclusion of various feed ingredients containing anti-nutritional factors in poultry diets, thereby expanding the range of available options and reducing feed costs. Despite their different modes of action and substrates, the use of multiple enzymes concurrently has a potential for synergistic or additive effects. This chapter provides a review of the possible modes of action of these enzymes, as well as recent studies investigating the effects of using these enzymes individually and in combination for broiler chickens.

Table of contents

  • 1 Introduction
  • 2 Phytases
  • 3 Factors affecting phytase efficacy
  • 4 Inositol-related effects of phytase
  • 5 Proteases
  • 6 Protease effects on growth performance
  • 7 Protease effects on nutrient digestibility
  • 8 Practical applications of proteases
  • 9 Carbohydrases: xylanases
  • 10 Carbohydrases: amylase
  • 11 Enzyme combinations
  • 12 Conclusion
  • 13 Where to look for further information
  • 14 References