| Question | Answer |
| Why is Nutrition Important | -feed is a major expense (60-80% of total costs)
-feed costs have increased over the past few years
-genetics of animals are changing
-environmental impact |
| Feeds | materials fed to livestock which contain life sustaining nutrients |
| Feeding | the process of consuming feed by animals or the process of providing feed to animals |
| Diet | the makeup of the feed given to an animal |
| Ration | amount of feed provided (often interchangable with diet) |
| Nutrition | the act or process of nourishing or being nourished |
| Nutrient | a nutritive substance or ingredient |
| 6 Nutrient Categories | -water
-protein
-carbohydrates
-lipids
-vitamins
-minerals |
| Lind | -1753
-published treatise on scurvy and citrus fruit
-british started including citrus on naval (limey) |
| Antoine Lavoisier | -late 1700s
-carbon dioxide in human respiration (metabolism)
-invented the first calorimeter to measure heat production by an animal |
| Megendie | -1816
-fed foods without nitrogen to dogs
-resulted in death after ~1 month |
| 3 Major Roles of Nutrients | -regulation of processes (signaling)
-structural components
-energy (stored in chemical bonds; used for maintenance, production, activity, etc.) |
| Goals of Animal Nutrition | -meet the needs of the animals for stated production goals
-maintain animal health
-minimize costs of production (may not be consistent with maximum efficiency)
-ingredients used must be appropriate for the animals for which the diets are developed |
| Nutrient Composition of Green Corn Plant | -water: 70%
-carbohydrate: 25%
-protein: 2.5%
-ash: 1.7%
-fat: 0.8% |
