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Applied Poultry Nutrition

Applied Poultry Nutrition. M.E. Persia Iowa State University. Digestive Anatomy. Beak no lips or teeth Little insalivation Few taste buds Large eyes. Digestive Anatomy. Feed storage Similar to checks in chipmunks Similar to rumen Why?. Crop – Feed Storage.

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Applied Poultry Nutrition

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  1. Applied Poultry Nutrition M.E. Persia Iowa State University

  2. Digestive Anatomy • Beak no lips or teeth • Little insalivation • Few taste buds • Large eyes

  3. Digestive Anatomy • Feed storage • Similar to checks in chipmunks • Similar to rumen • Why?

  4. Crop – Feed Storage • Adaptation to feeding behavior Feeding Area Cover

  5. Digestive Anatomy • Gizzard or Ventriculus • Mastication • Rough inner lining • Grit • Muscular grinding

  6. Discussion Question Which diet would result in a larger gizzard and what are the productive consequences?

  7. Digestive Anatomy • Paired • Relative size…

  8. Relative Importance of the Hindgut Cecal/Colon Capacity % of Total Digestive Tract Horse 61.3 Ox 10.7 Sheep and Goats 12.7 Pigs 37.3 Dogs 14.4 Cat 15.9 Chicken 1.1 WHY?

  9. Digestive Anatomy • Exit point for feces, urine and egg

  10. What are Nutrients Used For? • Maintenance of life • Heat to maintain body temperature • Energy for vital body processes (including immune function) • Energy for movement • Nutrients to repair and renew cells and tissue • Important distinction no net gain or loss of body weight • Mostly energy – but also amino acids, fatty acids, vitamins and minerals • Factors affecting nutrient requirements • Exercise Weather Stress Health • Body size Temperament Production Individual variation

  11. What are Nutrients Used For? • Growth (also called production or productive) • Increase in size of bones, muscles, internal organs etc… • Preferential growth vital organs grow faster, followed by muscle tissue (Schmidt et al, 2012)

  12. Discussion Question Why would a younger animal (smaller) be more efficient?

  13. Utilization of Energy Gross Energy Fecal Energy Digestible Energy Urinary Energy Metabolizable Energy Heat Increment Net Energy Net Energy Maintenance Net Energy Production

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