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Computer Applications in Beef Nutrition

Computer Applications in Beef Nutrition

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Computer Applications in Beef Nutrition

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  1. Computer Applications in Beef Nutrition Dan Loy Iowa State University An Sc 519

  2. Why computer formulation? • Allow simultaneous diet formulation using complex nutrient models • Metabolizable protein systems • Net energy • Dry matter intake predictions • Factorial requirements of nutrients requiring production estimates

  3. Types of beef nutrition computer programs • Ration balancing • automates hand calculation • Ration analysis • evaluates ration for nutritional adequacy • Least cost formulation • linear programming to minimize costs within nutritional constraints

  4. Linear Programming -- Minimization

  5. Minimization Model • Minimize cost = $1X1 + $2X2 • Subject to: • 1X1 + 1X2 >=10 (Calcium) • 3X1 +1X2 >=15 (Protein) • 1X1 +6X2>=15 (Calories) • And • X1>=0, X2>=0

  6. X2 15 (0,15) 3X1 + 1X2 = 15 Feasible Region 10 1X1 + 1X2 = 10 (2.5,7.5) 5 1X1 + 6X2 = 15 (9,1) (15,0) X1 15 5 10

  7. X2 15 (0,15) Feasible Region 10 (2.5,7.5) Cost =$1X1 + $2X2 =$1(9) + $2(1) = $11 SOLUTION 5 (9,1) (15,0) X1 15 5 10

  8. ISU Beef Management Software • MCS Spreadsheet Series • A series of six worksheet templates to aid in beef management decisions • Beef Feedlot Monitoring Program • computerized feedlot management and closeout analysis

  9. Beef Feedlot Ration Analysis (MCS-7) • Evaluates rations and projects performance for growing cattle • Calculates ADG, cost of gain, ration adequacy • Rations adjusted by trial and error

  10. Beef Cow Ration Analysis (MCS-13) • Evaluates ration for beef cow herds • Corrects for cow size, milk production, environment and condition

  11. Cowculator • OSU Beef Cow Ration Balancer • Similar to MCS-13

  12. Costs and Returns to Beef Cattle Feeding (MCS-14) • Evaluates feeding and purchase decisions in a budget format • Evaluates alternative feed prices, cattle types and weights, market price and risk, market timeliness and other factors on profitability

  13. Beef Feedlot Monitoring Program • Tracks performance and cost of individual pens of cattle • Aides in making mid-course corrections in feeding and management • Develops close-out analysis for comparison • Tracks feed inventory • Develops billings for custom-fed cattle

  14. Beef Management Software with Nutritional Components • Simulation Software • MCS-14 • Oklahoma State BEEFGAIN • Monitoring of performance • ISU Beef Feedlot Performance and Cost Monitoring

  15. TAURUS • Least cost ration formulation for beef cattle • Developed at University of California - Davis • Version 2.0 is latest version • Version 1.1 is on disk