1998 Nebraska Swine Report
Table of Contents

Reproduction
Efficacy of Once (1x) Vs Twice (2x) Daily Physical or Fence-line Contact with Boars for Stimulating Earlier Puberty in Gilts 3
Follicular Development in Gilts Selected for High Ovulation Rate and Embryo Survival Vs Randomly Selected Control Line Gilts 5
Genetics
The Effects of Genetic Line and Diet Regimen on Attainment of Puberty in Gilts 8
Effects of Gestation Housing System on Productivity of Three Genetic Lines of Sows 10
Responses to 14 Generations of Selection for Components of Litter Size 12
Health
Activity of Four Antimicrobial Agents Against Porcine Serpulina Pilosicoli Isolates From the Midwestern United States 17
Nutrition
Protein Sources for Segregated Early Weaned (SEW) Pigs 20
Dietary Fiber in Sow Gestation Diets - An Economic Analysis 23
Plasma Urea Can Be Used to Identify the Protein Requirements of Group-penned Finishing (130 to 220 lb) Barrows and Gilts Fed Corn-soybean Diets 26
Responses of Barrows Consuming a Diet Formulated on an Ideal Protein Basis at Different Feeding Levels 30
The Effect of Protein Intake on Growth Performance, Plasma Urea Concentration, Liver Weight, and Arginase Activity of Finishing Barrows and Gilts 34
Pork Quality and Meats
Improvement of Pork Loin Tenderness Using the Hydrodyne Process 36
Properties and Applications of Pork Trim Obtained from an Advanced Meat Recovery System 38
Utilization of Raw Pork Skins in Reduced Fat Fresh Pork Sausage 42
Housing
Pen Space Allocations and Pelleting of Swine Diets 44
Building Loads and Failures 46
Ventilation Systems - Redundancy is Essential 47
Manure Management
Nutrient Balance in Nebraska Livestock Confinement Systems 48
Legal Aspects
The Pig Pro Decision, Networking, and Environmental Protection: The Public Policy Challenge 51
Appendix
Explanation of the Statistics Used in This Report 54


August 4, 1998
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