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BY4055
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Triglycerides
Storage form of fat
Energy density
Fat 40 MJ/kg DM
Approximate fat content (g/kg DM)
Oats 50
Structure of fat
Composed of glycerol backbone + fatty acids (FA)
Triglyceride
Three FA attached to glycerol
Fatty acid chain length
C2–C24
Fatty acid types
Saturated (no double bonds)
Saturated fatty acids
Butyric C4:0
Unsaturated fatty acids
Palmitoleic C16:1
Functions of fat
Concentrated energy source
Digestion of fat
Hydrolysed mainly in small intestine by pancreatic lipase
Sources of fat
High-oil compound feeds
Omega fatty acids
Omega-6 (Linoleic) → Arachidonic acid → pro-inflammatory eicosanoids
Energy in diet
Types: Gross Energy (GE)
Storage issues with high-fat feeds
Unsaturated FA prone to oxidation