ADSC 2010 Lecture 13 Outline of Last Lecture I Categories of Feedstuffs A Concentrates a Cereal Grains b Oilseeds c By Products B Roughages a Legumes b Grasses c Forms of Roughages 1 Pasture 2 Hay 3 Silage Haylage II Proximate Analysis of Feedstuff A Six Components B Feed Chart III Digestibility of Feedstuff A Examples Outline of Current Lecture I Measurement of Energy in Feedstuff A Nutrients that contribute to energy B Two methods to estimate energy 1 Total Digestible Nutrient TDN 2 Metabolizable Energy ME Net Energy NE II Basic Ration Balancing A Pearson Square Current Lecture I Measurement of Energy in Feedstuff A Nutrients that contribute to energy content CHOs Lipids Proteins B Two methods to estimate energy content 1 Total Digestible Nutrient TDN based on the proximate analysis and digestibility measures for a feed digestible protein digestible fat x 2 25 digestible crude fiber digestible NFE Factors influencing TDN a Dry matter content b Nutrient Digestibility c Ash content d Fat content Calculating TDN 100 lbs of feed as fed basis Dry matter content 91 5 CP CFat CF NFE Feed 8 7 2 01 27 89 48 22 Feces 4 4 894 18 32 18 32 Digest 49 4 55 5 34 3 62 Dig Nutr 4 3 2 5 9 6 29 9 TDN 46 3 or TDN DM basis 46 3 91 5 50 6 2 Metabolizable Energy ME Net Energy NE more commonpartitioning of energy Gross energy bomb calorimeter KCal gram or MCal Loses energy in feces 20 in concentrates 40 50 in Roughages Digestibile Energy Dig Nutr Conten Loses enegy through uring and gases 6 urine and 5 20 gases Cattle Sheep ruminants bacteria microorg Metaolizable Energy Collect Urine and gases Loses energy in the form of heat Net Energy Maintinance NEm Production NEg or NEl II Basic Ration Balancing Formulate a swine diet with 16 CP utilizing corn 8 9 and a commercial protein supplement 36 0 089x 0 36 1 x 0 16 0 089x 0 36 0 36x 0 16 0 271x 0 20 X 0 738 Corn 73 8 A Pearson Square Corn 8 9 Supp 36 16 20 7 1 Total 27 1 Corn 20 27 1 73 8 Supp 7 1 27 1 26 2 Suppl 26 2
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