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Guaranteed Analysis and Ration Formulation. Animal Production and Products Adv Animal Science. Guaranteed Analysis. Guaranteed Analysis The minimum levels of nutrients in a unit of feed Required by law: Minimum Crude Protein Minimum Crude Fat Maximum Crude Fiber
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Guaranteed Analysis andRation Formulation Animal Production and Products Adv Animal Science
Guaranteed Analysis • Guaranteed Analysis • The minimum levels of nutrients in a unit of feed • Required by law: • Minimum Crude Protein • Minimum Crude Fat • Maximum Crude Fiber • If more than 6.5 percent total mineral elements then some minerals
Guaranteed Analysis • TDN – Total Digestible Nutrients • Percent of digestible nutrients in the feed • DM – Dry Matter • The percentage that is not moisture in the feed • Most nutrients are listed on a DM basis (not as-fed)
Guaranteed Analysis • CP – Crude Protein • Total percent of true protein and non-protein nitrogen
Guaranteed Analysis • ADF – Acid-Detergent Fiber • Percentage of highly indigestible matter • Cellulose, lignin, silica • Low ADF means high energy in forages
Guaranteed Analysis • NDF – Neutral-Detergent Fiber • Percentage of structural/cell wall in forage • High NDF means low intake amounts • Example - clover
Calculating Rations • Calculating Rations • Example – need 14% crude protein diet • Corn is 9% CP • Soybean Meal (SBM) is 44% How much of each do you need to feed?
Calculating Rations • Pearson Square • Tool for reaching a desired nutritional level using two or more feeds OR • Algebraic Equation method
Ration Formulations Feeds Table
Types of Feed • Alfalfa pellets • Rice bran • Beet pulp pellets • Soybean meal • Alfalfa cubes • Cottonseed meal • Chopped hay • Wheat bran • Whole oats • Iodized salt • Rolled oats • Trace mineral salt • Whole barley • Salt w/selenium • Rolled barley • Rye • Whole corn • Wheat • Cracked corn • COB (a=wet, b=dry) • Rolled corn • Molasses • Linseed meal • Flax • Crimped oats