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ANS-311 Principles of Animal Nutrition
Feed Additives
18
Agriculture
Undergraduate 3
11/27/2011

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Term
Why are feed additives important?
Definition
Promotes and enhances product, health, feed efficiency. Reduces pathogens in the food chain and contamination.
Term
Common feed additives
Definition
Enzymes
Antibiotic Growth Promoters
Antioxidants
Coloring agents
Term
Enzymes:
Definition
Enhances availability of bound nutrients and reduces contamination.
Term
Two types of enzymes
Definition
Carbohydrase, Phytase
Term
Phytase
Definition
Make up 85% of P in grains. Enzyme releases P from phytic acid in the grain. ^ P retention V, P Excretion
Term
Carbohydrase
Definition
Enzyme that decreases carbs and acts on non-starch polysaccharides.
Term
Types of carbohydrases
Definition
B-glucanase
Pentosanase
Xylanase
Cellulase
Saccharidases
Term
Antibiotic growth promoters
Definition
Growth promotion and Prophylatic properties
Term
Prophylactics
Definition
Prevents growth of harmful organisms, E-coli, salmonella etc.
Term
Why use Antibiotic growth promoters?
Definition
Increase efficiency, nutrient absorption, improves feed consuption
Term
What are some concerning issues revolving around AGP?
Definition
Can leave residues in food chain, resistance development, market restrictions, run off in environment.
Term
Probiotics
Definition
Directly fed microbes that benefit the animal.
Term
Why use probiotics?
Definition
Promotes healthy and strong gut flora populations. Prevents colonization of bad bacteria by preventing attachment to the intestinal mucosa.
Term
Two types of probiotics
Definition
Cultures, fermentation products
Term
Antioxidants
Definition
Prevents oxidation of lipids and formation of free radicals. Reduces oxidative stress.
Term
Pigments and coloring agents
Definition
Enhances colorization of product. Esthetic appearance.
Term
Misc. additives:
Definition
Antiparasitics, Botanicals, Metabolic modifiers, implants (beef only)
Term
Competitive Exclusion
Definition
Kick out bad microbes by out competing them, for nutrient and space sources.
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