ADSC 2010 Lecture 35 Outline of Last Lecture I Stocker Background II Feedlot Finishing A Traits of Economic Importance in Feedlot a Post Weaning Gain b Feed Efficiency c Carcass Value B Economic Factors a Income b Costs III Advantages of Beef Cattle Production IV Disadvantages of Beef Cattle Production V Beef Cattle Diseases Outline of Current Lecture I Beef Cattle Disease Nutritional SWINE PRODUCTION II Farrow To Finish III Types of Production IV Management Considerations A Selection of Breeding Stock B Mating System C Management of Breeding Current Lecture I Beef Cattle Disease Nutritional 1 Bloat Gas retention in the rumen resulting in pressure and distention Occurs with legumes and high concentrate feeds 2 Grass Tetany Grass Straggers Hypomagnesemia Magnesium deficiency Problem on lush forage with increase in calcium and potassium cause reduces magnesium absorption Treat with IV of Mg Salts 3 Parturient Paresis Milk Fever After calving reduced appetite nervousness collapse Calcium deficiency Treat with IV Calcium Gluconate 4 Prussic Acid or acorn poisoning Accumulation of organic acids or nitrates Problem in rapidly growing plants Johnson grass Sudan grass millet Especially after frost or drought SWINE PRODUCTION II Farrow To Finish Breeding Gestation Farm One One Company Farrowing Nursery III Farm Two Grower Finisher Farm 3 Market GA Feeder Pig Production Farm 1 GA Farm 2 IOWA because we don t have feed for pigs in GA or slaughter plants Types of Production A Feed Pig Producer Produces weaned pigs sold at 30 60 lbs Grown finished in separate operations Characteristics of Operation Low feed requirements High management requirements Traits of economic Importance average ideal Litters sow year 1 7 2 2 Pigs born alive litter 9 5 12 0 Pigs weaned litter 7 5 10 0 Pigs marketed litter 7 2 9 10 Pigs marketed litter year 12 2 19 8 22 B Grower Finisher C Farrow To Finish D Multiplier Purebred genetic providers IV PIC Danbred SPG Dekalb companies are the primary providers Management Considerations 1 Selection of Breeding Stock 2 Mating Systems 3 Management of Breeding 4 Management during gestation 5 Management at farrowing 6 Care of young pigs A Selection of Breeding Stock Boars and gilts should be from litters with large numbers of pigs born alive Number of pigs weaned can be misleading because of Cross Fostering 12 or more prominent and evenly spaced teats avoid inverted nipples Good structural soundness primarily feet and legs Sow Productivity pigs born pigs weaned litter weaning weight litters year Growth Traits Weight at 155 days average dairy gain feed gain Carcass Traits Backfat loin eye area fat free lean B Mating System White breed females generally cross bred Colored Boar terminal mating Three breed rotational system Yorkshire Hampshire Duroc Rotational Terminal System Rotation with Landrace Yorkshire Chester to produce females terminal with colored boar Current use of crossbred hybrid lines for maternal and paternal lines C Management of Breeding Gilts start cycling at 5 months don t breed on 1st estrus Breed 8 months and 250 260 lbs Don t breed sow on 1st heat after farrowing annovulatory estrus Breeding Systems Pen Mating Boar with 10 12 sows for about 4 weeks Hand Mating heat detect and bring boar sow together 2x min AI heat detect and breed AI
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