Chapter 1 Nutrients

Chapter 1 Nutrients - DARY 3010 Spring, 2009 Review of...

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DARY 3010 Spring, 2009 Review of Nutrients and Digestion
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Nutrition Broad discipline The series of chemical, biochemical, and physiological processes which transform food elements into body tissues and activities. Lavoissier – French chemist - “Life is a chemical process”
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What is a Nutrient? A dietary essential Not all animals require the same nutrients
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Feedstuff Edible material consumed by animals which contributes energy and/or nutrients Any material of natural or synthetic origin A nutrient carrier Feedstuffs Natural: corn, soybean, wheat, etc. Natural processed: SBM, wheat bran, corn gluten feed, etc. Synthetic: crystalline amino acids, vitamins
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Diet vs Ration? Diet: feed ingredient or mixtures of ingredients including water, which is consumed by animals Nourish the animal for more than 24 hours Ration : amount of feed consumed by an animal in 24 hours Balanced ration : one which provides an animal with proper amounts and proportions of all the required nutrients for 24 hours. Ton of steer feed: 92.2% ground corn 7.0% SBM .1% vitamin A premix .7% mineral Steer eats 5 kg/day of this diet, that is his ration or daily allowance.
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Made up of C, H, O, N, S, and P. Principle constituent of the organs and soft structures of animal body Dietary requirement (%) highest in growing animal and declines gradually to maturity. Large molecules with MW ranging from ~500-millions. Because of large size, they vary widely. Composed of: 20 AA’s make up animal proteins 10 Essential AA Must be provided in diet Ruminants: synthesized by microbes List: Phenylalanine Tryptophan Histidine **may be remembered Valine Isoleucine Arginine
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This note was uploaded on 02/03/2009 for the course DARY 3010 taught by Professor Williams during the Spring '09 term at LSU.

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Chapter 1 Nutrients - DARY 3010 Spring, 2009 Review of...

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