CONFERENCE SPONSORS The Mid-Atlantic Feed Industry Council and the Conference Organizing Committee extend sincere appreciation to the following sponsors for the generous support of this educational program for the animal feeding industry: PATRONS AB Vista Elanco Evonik Degussa SUSTAINING SPONSOR Cargill Animal Nutrition Danisco Animal Nutrition Micronutrients, Heritage Technologies LLC SPECIAL SPONSORS Balchem Corporation Blue Seal Foods Central Life Sciences Cumberland Valley Analytical Services Diamond V Double S Liquid Feed Services Inc. DSM Nutritional Products Kemin Industries Lesaffre Feed Additives Micron Bio-Systems, Inc. Milk Specialties Global Animal Nutrition Nutriad Old Mill-Troy Southern States/Triple Crown Nutrition Venture Milling Vi-COR Zinpro Performance Minerals SPONSORS Adisseo ALPHARMA Arm & Hammer Animal Nutrition Buffalo Warren Company ChemGen Corp Continental Seach and Outplacement Hubbard Feeds MarSyt Mercer Milling Company Pennfield Animal Feed Technologies Perdue Farms, Inc Poultry Technical Services Prince Agri Products, Inc Triple-M-Farms Wenger's Feed Mill, Inc 2011 Mid-Atlantic Nutrition Conference Conference Committee: Conference Chair and Editor .....................................Nick Zimmermann Program Chair............................................................Paul Patterson Technical Symposium Chair......................................Kiera Finucane Coordinator ................................................................Kiera Finucane Educational Institutions in Delaware, Maryland, New Jersey, Pennsylvania, Virginia, and West Virginia, the USDA, and the Maryland Feed Industry Council are collaborators in the planning and funding of The Mid-Atlantic Nutrition Conference. Program Committees/Manuscript Reviewers: General Program Committee Nick Zimmermann, Chair – Univ. of Maryland Paul Patterson – Penn State University James McNaughton, Co-chair – AHPharma William Saylor – University of Delaware Poultry Program Committee Paul Patterson, Chair – Penn State University Joe Moritz – West Virginia Univ. Gary Howell, Co-chair, – Perdue Farms, Inc. Ted Miller – Mountaire Farms, Inc. Jennifer Timmons – Univ. of Maryland Nick Zimmermann – Univ. of Maryland Robert Elkin – Penn State University Bill Saylor – University of Delaware Roselina Angel – Univ. of Maryland Randy Mitchell – Perdue Farms, Inc. James McNaughton – AHPharma Equine Program Committee Holly Spooner, Chair – West Virginia Univ. Amy Burk – University of Maryland Marty Adams, Co-chair – Southern States Burt Staniar – Penn State Amy Iafolla – Triple Crown Feed Ann Swinker - Penn State Karen Engel – Southern States Carey Williams – Rutgers University Carissa Wickens – University of Delaware Dairy Program Committee Richard Erdman, Chair – Univ. of Maryland Richard Kohn – University of Maryland Patrick French, Co-chair – Elanco David Kirk – Pennfield Animal Nutrition Will Seymour – Southern States Brian Bequette – Univ. of Maryland Clay Zimmerman – Blue Seal Richer Student Poster Committee Carey Williams, Chair – Rutgers University Nick Zimmermann – Univ. of Maryland i 2011 Proceedings of the Ninth Annual Mid-Atlantic Nutrition Conference © Edited by Nick Zimmermann Published in March 2011 By the Mid-Atlantic Feed Industry Council Department of Animal and Avian Sciences University of Maryland College Park, MD 20742 2011 Maryland Feed Industry Council Amy Iafolla, President Triple Crown Feed Randy White, Vice-President Venture Milling William Seymour, Secretary Southern States Nick Zimmermann, Treasurer University of Maryland Patrick French Elanco David Kirk Pennfield Animal Nutrition Roger Scaletti Alltech James McNaughton AHPharma Gary Howell Perdue Farms, Inc. Conference Note: The Mid-Atlantic Nutrition Conference is a regional meeting that evolved from the Maryland Nutrition Conference for Feed Manufactures. Program content and format remain the same. iii TABLE OF CONTENTS Presenter1 Title Page General Session Steve Auman Phosphorus Availability - When Will We Run Out of Phosphorus?.............................1 Paul H. Patterson Recycling Minerals from Poultry and Livestock By-products ......13 Brooke Humphrey Nutrient-Driven Approaches to Optimize Innate Immunity..........22 Mark E. Cook Dietary Egg Antibody Directed to Host Gastrointestinal Targets to Overcome Inflammation-Induced Losses in Growth and Feed Efficiency ..............................26 AB Vista Technical Symposium Program - see Page vi Dairy Session Richard A. Kohn Feeding Management to Decrease Methane Emissions from Ruminants .................................................................36 Thomas R. Overton Biology and Troubleshooting of Low Milk Fat on Dairy Farms ..................................................................37 Lance Forster Using Corn Coproducts from Ethanol Production – Opportunities and Challenges in Feeding Efficiency ........46 Ryan Ordway Role of Rumen-Protected Nutrients in Diets That Are High in Ethanol Byproducts........................................................47 A. F. Kertz Feed Efficiencies in Growing Dairy Heifers .................................55 Chad Dechow Genetic Selection in Dairy Cows Using Residual Feed Intake and Other Feed Efficiency Measures.................................65 Rich Erdman Monitoring Feed Efficiency in Dairy Cows Using Fat- Corrected Milk per Unit Dry Matter Intake.......................69 1Speaker information may be found on the first page of their paper. iii TABLE OF CONTENTS (cont.) Presenter1 Title Page Equine Session Teresa A. Burns Unraveling the Role of Inflammation in Equine Laminitis: What we’ve Learned From a Toxic Disease Model .........................................................80 Kenneth L. Marcella Death in the Feed Room - Ionophore Toxicity in the Horse..........86 Lon W. Whitlow Mycotoxin Effects in Horses .........................................................90 Rhonda M. Hoffman Fescue Toxicity in Horses: Complications, Concerns and Prevention........................101 Anthony P. Knight Poisonous Plants in the Horse’s Environment.............................107 Josie A. Coverdale Nutrition of the Young Horse – Risks of Overfeeding................116 Ann M. Swinker Update of Nutrient Management Regulations and the Equine Industry ...................................................122 Poultry Session Henk Enting The Effect of European Union Broiler and Layer Directives on the Composition of Poultry Feeds...............................132 Elizabeth Koutsos Trace Mineral Nutrition in Poultry – Copper, Zinc and Manganese ..........................................141 C. R Angel Diet Amino Acid Density and Poultry Product Costs .................148 Jeff Smith Poultry Production and Environmental Sustainability ................153 Amy B. Batal By-Product /Co-Products Feedstuffs from Bio-Fuel Production for Poultry......................................................154 Jerry C. Weigel Corn: Supply, Uses and Future ....................................................164 Mark E. Cook What Poultry Nutritionists and Marketers Need to Know About Conjugated Linoleic Acid: A Potent Anti- Inflammatory of Ruminant Origin...................................169 1Speaker information may be found on the first page of their paper. iv TABLE OF CONTENTS (cont.) Presenter Title Page Competing Grad Student Abstracts Umang Agarwal Butyrate Regulates Urea Metabolism and Nitrogen Use in Sheep...........................................................................178 Heather K. Burley Turkey Litter and Hen Manure Ash Phosphates as a Dietary Supplement for Broiler Chickens.....................................179 Qiong Hu Energy Balance Regulation and Carbohydrate Utilization in Developing Chicken Embryos .........................................180 Competing Undergrad Student Abstracts L. Etz Plasma Amino Acid Concentrations in Young Quarter Horses Fed Graded Doses Of Dietary Leucine ...............181 Jennifer M. Hanke1 Body Condition Improvements in Underweight Horses Fed Senior Horse Feed.....................................................182 S. E. Shane Changes in Fecal Microbial Populations and Associated Blood Variables in Morgan Horses Maintained on Pasture or Dry Lot.......................................................182 Cara A. Urban Dietary Protein Levels Affect Nitrogen Excretion in Horses ......183 Inside Back Cover CD Contents: Proceedings of the 1st to 9th Mid-Atlantic Nutrition Conferences Presentations from the 8th Mid-Atlantic Nutrition Conference Table of Contents for the 50 years of the Maryland Nutrition Conference for Feed Manufacturers We thank the program participants for their cooperation in providing the material in this document. SAVE THE DATES: MARCH 28-29, 2012 10TH MID-ATLANTIC NUTRITION CONFERENCE v AB Vista Technical Symposium Wednesday, March 23rd The Technical Symposium will be held at 2:00pm 2:00pm Welcome Joe Slattery, AB Vista 2:10pm Corn Quality and Impact on Nutrient Digestibility Bill Dozier, Auburn University 2:30pm Differentiation of Xylanases and Potential Benefits of a Xylanase-Phytase Combination Tara York, AB Vista 3:00pm Impact of Calcium on Phytase Efficacy in Poultry Roselina Angel, University of Maryland 3:25pm Calcium Solubility and Digestibility: The Influence of Calcium Source and Phytase Carrie Walk, AB Vista 4:00pm Exploiting Calcium-Specific Appetite in Broiler Nutrition Aaron Cowieson, University of Sydney, AU 4:50pm Wrap Up and Final Questions 5:00pm RECEPTION, Sponsored By AB Vista vi PHOSPHORUS AVAILABILITY - WHEN WILL WE