Animal Science Department

 

Authors

Date of this Version

1-2016

Citation

2016 Nebraska Beef Cattle Report. University of Nebraska Extension MP103. Lincoln, NE.

Comments

© 2015 The Board Regents of the University of Nebraska.

Produced by the Animal Science Department, Agricultural Research Division, and University of Nebraska Extension, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln.

Abstract

Contents

Cow/Calf: Effects of Wintering System on Cow and Calf Performance in a Summer-Calving Intensive Production System ● How Many Clean-up Bulls Are Needed after Estrus Synchronization and Artificial Insemination? ● Economics of Rebreeding Non-pregnant Females ● Effect of MGA vs CIDR Estrus Synchronization on Estrus Response and Pregnancy Rates in 311 d Old Beef Heifers ● Comparison of TAI at GnRH Injection and Delayed Insemination of Non-estrus Beef Heifers ● Effect of Dam Age on Offspring Productivity ● Cows with Excess Androgen are Anovulatory and Have Differing Patterns of Progesterone Secretion ● Granulosa Cell Exposure to Excess Androgens Inhibits Their Ability to Proliferate in the Cow Which May Cause or ● Perpetuate Androgen Excess

Growing: Evaluation of Different Byproduct Combinations along with Treated Corn Stover on Growing Steer Performance ● Effects of Feeding Isolated Nutrient Components in MDGS on Growing Cattle Performance ● Effects of Supplemental Energy and Protein Source on Performance of Steers Grazing Irrigated Corn Residue ● Effects of Replacing a Traditional Growing Diet with a Complete Pelleted Feed on Total Tract Digestibility of Growing Diets ● Effect of Pelleted Byproducts on Performance When Fed to Growing Cattle 36 ● Effect of Pelleted Feed Products and Bambermycins on Performance When Fed to Cattle Grazing Residue 38 ● Effect of Crude Glycerin Concentration on Forage Digestion Parameters in Beef Calves 40 ● Impact of Crude Glycerin Supplementation on Rumen and Duodenal Microbial Populations in Forage Diets 44 ● Methane Production, Diet Digestibility, and VFA Profile of Growing Steers Fed High or Low Quality Forage 46 ● Effects of Protein Supplementation in Corn Silage Growing Diets Harvested at 37 or 43% DM on Cattle Growth 49 ● Effect of Winter Distillers Grains Supplementation Level on Spayed Heifer Performance 52 ● Utilizing Corn Residue or Fall Double Cropped Forages for Winter Backgrounding of Calves 55 ● Finishing Yearling Heifers Using Self-Fed Dried Distillers Grains on Pasture 58 ● Performance and Economics of Supplementing Yearlings on Smooth Bromegrass Pastures 61

Forage and Residue Resource Management: Observations of Forage Quality and Calf Gain When Grazing Double Cropped Forage following Wheat Harvest 65 ● Annual Forages following Irrigated Winter Wheat 68 ● Accurate Amounts and Nutritive Values of Corn Residues 71 ● Effect of Corn Residue Composition on Digestibility by Lambs 74 ● Effect of Corn Residue Harvest Method on In Vivo and In Vitro Digestibility 76 ● Effect of Corn Plant Maturity on Yield and Nutrient Quality of Corn Plants, 2-Year Summary 79 ● Effect of Harvest Method on Residue Quality 81 ● Effects of Different Inoculum Used for In Vitro and In Situ Digestion Procedures Performed on Corn Residue Samples 84

Finishing: Effect of SafeguardR on Fecal Egg Count and Steer Performance in Newly Received Calves 87 ● Evaluation of Varying Corn Grain (and Byproduct) Inclusion in Beef Cattle Finishing Diets 89 ● Carcass Gain, Efficiency, and Profitability of Steers at Extended Days on Feed 91 ● Effects of Feeding OmniGen-AFR on Immune Function, Performance, and Carcass Characteristics during the Feeding Period 96 ● Yeast Supplementation Alters the Immune Response in Feedlot Steers 99 ● Effects of Supplementing OmniGen-AFR with or without Ractopamine Hydrochloride on Performance and ● Carcass Characteristics of Feedlot Steers 102 ● Effects of Shade and Feeding Zilpaterol Hydrochloride to Finishing Steers on Performance, Carcass Quality, Heat Stress, ● Mobility, and Body Temperature 105 ● Impact of a Newly Developed Direct-Fed Microbial on Performance in Finishing Beef Steers 108 ● Effects of Direct-Fed Microbial Supplementation in Different Diets on Performance and Carcass Characteristics of ● Beef Feedlot Heifers 110 ● Impact of Inoculating Corn Silage with Buchnerii 500 on Feedlot Cattle Performance with or without ● Added Yeast Product at Time of Feeding 112 ● Rumen Protected Amino Acids in Finishing Cattle Diets 115 ● Metabolic and Body Temperature Responses to Environmental Conditions across Seasons in Finishing Steers 117 ● Impact of Feeding Distillers Grains or Isolated Components in Distillers Grains on Feedlot Performance and Carcass Traits 122 ● Evaluation of Distillers Grains Components Singly or in Combination in a Calf Fed Feedlot Study 124 ● Modifying Different Components of Distillers Grains and the Impact on Feedlot Performance 128 ● Evaluation of the Relative Contribution of Protein in Distillers Grains in Finishing Diets on Animal Performance 132 ● Evaluating Syngenta Enhanced Feed Corn on Finishing Cattle Performance and Carcass Characteristics 135 ● Site and Extent of Digestion of Finishing Diets Containing Syngenta Enhanced Feed Corn 139 ● Evaluating Syngenta Enhanced Feed Corn Processed as Dry-Rolled or High-Moisture Corn on Cattle Performance and ● Carcass Characteristics 143 ● The Effects of Delayed Corn Silage Harvest on Corn Silage Yield and Finishing Performance in Yearling Steers 146 ● Use of Dietary Nitrate or Sulfate for Mitigation of Methane Production by Finishing Steers 149 ● Effect of Diet on the Rumen Microbial Community Composition of Finishing Cattle and the Role it ● Plays in Methane Emissions 151

Beef Products: Effect of Feeding De-oiled Dry Distillers Grains Plus Solubles on Beef Oxidation, Color and Tenderness 153 ● Beef Fatty Acid Profiles from Steers Finished with De-oiled Dry Distillers Grains Plus Solubles vs a Corn-Based Diet 156 ● Effect of Feeding Dried De-oiled Distillers Grains and Addition of Postmortem Antioxidants on Ground Beef Shelf Life 158 ● Impact of Supplementing Cattle with OmniGen-AF at the Receiving or Finishing Phase on Beef Shelf-Life 161 ● Effect of Feeding Distillers Grains and Supplementing with Dietary Antioxidants on Ground Beef Shelf Life and ● Fatty Acid Profile 164 ● Effects of Dietary Antioxidant Supplementation on Cattle Finished with 30% Wet Distillers Grains Plus Solubles on ● Fatty Acid Profiles and Display Life 167 ● Feeding Vitamin E May Reverse Sarcoplasmic Reticulum Membrane Instability Caused by Feeding Wet Distillers Grains Plus ● Solubles to Cattle 170

Industry Perceptions: Student Perceptions and Knowledge of the Feedlot Industry and the Feedyard Management Specialization Internship 173 ● Producer Concerns and Perceptions Regarding the Effect of Methane on Cattle Production and the Environment 177

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