1. Nutrients and Nutrient Requirements Topic 3041 Anna Blight

2. Nutrients Any feed component that functions in the support of life

3. 20 Chemical Elements in Nutrients Carbon (C) Calcium (Ca) Chlorine (Cl) Cobalt (Co) Copper (Cu) Fluorine (F) Hydrogen (H) Iodine (I) Iron (Fe) Magnesium (Mg) Manganese (Mn) Molybdenum (Mo) Nitrogen (N) Oxygen (O) Phosphorus (P) Potassium (K) Selenium (Se) Sodium (Na) Sulfur (S) Zinc (Zn)

4. Six Basic Classes of Nutrients Water Carbohydrates Fats Proteins Vitamins Minerals

5. Composition of Feeds Concentrates Cereal grains Oil meals Molasses Dried milk products Roughages Hays and straws Silage Cut green feeds Grazed forages

6. Concentrates High in energy Low in fiber Highly digestible Includes corn, wheat, barley, oats, milo, soybean meal, linseed meal, and cottonseed meal

7. Roughages Less digestible than concentrates Bulkier, coarser feed

8. Water Most important nutrient Contains hydrogen and oxygen Transports other nutrients Helps maintain normal body temperature

9. Carbohydrates Major energy source Contains carbon, hydrogen, and oxygen Found in grains and hays

10. Fats Fats and oils are primary energy source 2.25 times more energy / pound than carbohydrates Contains carbon, hydrogen, and oxygen

11. Protein Only nutrient class that contains nitrogen Protein in feeds contain average of 16% nitrogen Building blocks of the body Proteins compose most of the muscle mass

12. Minerals Elements other than carbon, hydrogen, oxygen, and nitrogen Macrominerals are required in larger amounts Microminerals required in smaller amounts Necessary for healthy body functions

13. Vitamins Organic nutrients, contain carbon Provide for very specific body functions Required in very small amounts 16 known vitamins in animal nutrition A, C, D, E, K, choline and the B- complex vitamins

14. Two basic functions run by energy are maintenance and reproduction Supplied by nutrients containing carbon Carbohydrates, fats, and proteins all supply energy Energy evaluation of feeds is measured by total digestible nutrients, digestible energy, energy for metabolism, and net energy

15. Importance of Nutrition Energy supplied by nutrients are used to drive a variety of body functions and power animal movement

16. Healthy and productive livestock require proper nutrition Reference Taylor, R.E., Field, T.G. (1998). Scientific Farm Animal Production. Upper Saddle River: Prentice Hall. Pp. 269-282.