ADSC 2010 Lecture 32 Outline of Last Lecture I Milk Production Cycle A Milk Production B Rebreeding C End of Lactation D Dry Period II Milk Composition III Factors Affecting Milk Production A Breed B Size C Age D Length of Dry Period E Nutrition F Body Condition G Milking Frequency H Season I Disease J Management IV Mastitis V Calf Management A Uses of Dairy Calves B Calf Management Outline of Current Lecture I The Four Segments of Beef Production II Purebred Seedstock Production III Commercial Producers IV Stocker Backgrounders V Feedlot Finishing Phase VI Beef Production Four Segments VII Outline of Beef Industry VIII More Detail Current Lecture I The Four Segments of Beef Production 1 Purebred producers 2 Commercial Producers 3 Backgrounds Stockers 4 Feedlot Finishers II Purebred Seedstock Production Cows bred To Elite Bulls At Christmas Calves Born first Calves Weaned in April Week in October Heifers bred at 15 mo And sold at 18 months III Bulls rasied to yearling age and marketed Commercial Producers Cows Bred to bull Heifer Cows Desirables kept for Replacement Females in herd IV V VI Bull Calves Undesirable go to market Stocker Backgrounders 400 500 calves Purchased from Market in large groups Bulls castrated and steers are taken to market calves grass product Feedlot Finishing Phase Cattle 750 900 Feed high protein Grain feed 100 200D Gain 3 5 4 5 per day Beef Production Four Segments A Purebred SeedStock Slaughtered at 10501350 about 16 30 mo Old VII Produce breeding stock germ plasm Segment where genetic improvement is made B Cow Calf Commercial cross breeding Main purpose produce calves for meat production Birth to weaning 7 9 months Mainly forage based C Stocker Backgrounders Weaning to feeding 12 18 months Convert Forage or Roughage to muscle and bone Want growth but not fattening D Feedlot Finishing End of stocking to slaughter 18 24 months Confinement and feed high energy diet corn soybean Main purpose fatten cattle and improve meat quality Outline of Beef Industry Cull Heifers and Steers VIII More Detail A SeedStock Purebred 3 5 of US Beef Production Requires most skill knowledge Labor intensive Greatest value per animal Small portion of herd sold as seedstock remainder for slaughter Major focus on genetic selection improvement EPDs Focus on reproduction production and carcass traits Elite Determine direction of industry product high valued bulls and cows Multipliers sell bulls semen spread germ plasm Commercial produce slaughter cattle
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