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ANS 311
Principles of Animal Nutrition
| Term | Definition |
|---|---|
| Dry Matter | All nutrients except for water; DM = (dried weight/fresh weight) * 1000 |
| Ether Extract | EE - measures fat content |
| Crude Protein | CP - measures total protein using Kjeldahl; CP = (N)(6.25) |
| Ash | Measures all inorganic mineral content |
| Crude Fiber | CF - measures total fiber |
| Nitrogen-Free Extract | NFE - calculated value of carbs; NFE = DM - all other nutrients |
| Neutral Detergent Fiber | NDF - hemicellulose, cellulose, lignin |
| Acid Detergent Fiber | ADF - cellulose & lignin |
| Gross Energy | Total energy; bomb calorimeter |
| High-Performance Liquid Chromatography | HPLC - identifies amino acids |
| Atomic Absorption Spetrophotometry | Identifies minerals from ash process |
| Near-Infrared Reflectance Spectrophotometry | NIRS - feed and forage analysis |
| Gas-Liquid Chromatography | GLC/GC - identifies volatiles |
| Digestibility | (Nutrient in - nutrient out)/(Nutrient in) |
| Rumen | Largest component; fermentation chamber; lined with papillae |
| Reticulum | Regurgitation initiator; honeycomb |
| Omasum | Food filter; folds; acts as sieve; water absorption |
| Abomasum | Glandular stomach; chemical digestion (HCl) |
| 4 steps of rumination | 1. Regurgitation, 2. Remastication, 3. Resalivation, 4. Redeglutition (swallowing bolus & liquids) |
| Crop | Storage and fermentation |
| Proventriculus | Glandular stomach; thick mucosa, low pH |
| Gizzard | Grinds up food; "hen's teeth" |
| Liver | Central organ, largest gland; most metabolically active; production of bile |
| Pancreas | Produces digestive enzymes and hormones |