Nutrients Chapter 3 of text

1
Nutrients (Chapter 3 of text)

• Water
• Energy carbohydrates, fat
• Protein
• Mineral macro, micro (trace)
• Vitamin fat and water soluble

2
Nutrients Water

• Functions
• Transport (some in solution, some in suspension)
• Digesta through the GI tract
• Nutrients, etc in the blood
• Media to excrete nitrogenous waste (urine)
• Body temperature regulation cooling by
  evaporation and respiration
• Lubricate joints
• In ruminants, media for microorganisms

3
Nutrients Water

• Sources of water for animals
• Drinking (and ingested water)
• Most water is absorbed in the lower SI and LI
• In the ruminant much water is absorbed in the
  rumen
• Much is reabsorbed by passive diffusion and by
  saliva
• Metabolic water
• Water is derived from the oxidation of
  energy-deriving nutrients fats and CHO

4
Nutrients Water
net water produced, however is negative
5
Nutrients Water

• Require special management of water
• High salt diets especially when salt is used to
  restrict intake
• High forage diets the greater the bulk in the
  diet the more water needed
• Weather hot or cold

6
Nutrients Water

• always provide a source of clean fresh water
  it is essential for production
• animals will consume 3-4 times as much water as
  dry feed
• Consume water to maintain homeostasis in GIT and
  blood