Dr jeff lehmkuhler extension beef specialist university of kentucky 2009 anr update
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General Nutrition Updates Cowculator for Rations. Dr. Jeff Lehmkuhler Extension Beef Specialist University of Kentucky 2009 ANR Update. Mineral Issues. Coproducts – Feeding Corn Gluten Feed and/or Fuel Ethanol derived Distillers Grains Need add’l Calcium

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Dr. Jeff Lehmkuhler Extension Beef Specialist University of Kentucky 2009 ANR Update

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Dr jeff lehmkuhler extension beef specialist university of kentucky 2009 anr update

General Nutrition Updates

Cowculator for Rations

Dr. Jeff Lehmkuhler

Extension Beef Specialist

University of Kentucky

2009 ANR Update


Mineral issues

Mineral Issues

  • Coproducts – Feeding Corn Gluten Feed and/or Fuel Ethanol derived Distillers Grains

    • Need add’l Calcium

    • If = or > than 20% of Diet DM, no PhosSuppl

    • Looking at ~ 1 to 1.5% limestone or a 20-25% Ca mineral supplement

    • Sulfur – Can exceed max tolerable levels (0.4%) increasing risk to polioencephalomalacia (PEM) or “Brainers” – Hydrogen Sulfide as toxic as cyanide


Dr jeff lehmkuhler extension beef specialist university of kentucky 2009 anr update

Sulfate Reduction in the Rumen

H2S and S2-

High Sulfur / Sulfate Intake

(Feed + Water)

Eructation

H2S Inhalation

Lung Tissue Damage

Cell Damage

S2- Absorption

?

PEM

Secondary Viral or Bacterial Infections

Poor Animal Performance

Adapted from Kung et al. 1998


Prevention manage risk

Prevention = Manage Risk

  • Provide a balanced ration – Threshold 0.40% S

  • Use of a coproduct specific mineral / supplement package

  • Thiamine may assist - Most coproduct supplements contain thiamine, may not work

  • Avoid use of high sulfate water – blend and/or restricted use of coproduct feeds


Mineral demo update

Mineral Demo Update

  • Strategic Supplementation of Beef Cows / Stockers

  • Concerns over Environment + Economics

  • Looking for Agents + Producer herds

    • Contact me later if interested


2009 demonstration farms

2009 Demonstration Farms

Lactating

Dry


Strategic p supplementation

Strategic P Supplementation

  • Cow Herd w/ Managed Pasture Fertility

  • Using a Custom Trace Mineral Salt Mix

  • Monitor Intake of Mineral, Forage P Conc.

Pre-Calving

Calving

3-6% P & Hi-Mag

Breeding / End

1 – 3% P

2 – 0% P

Wean / Gestation

1 – 0% P

2 – 3% P


Cowculator

Cowculator

  • Oklahoma State University

  • Ration software for Beef Cows

  • Based on Recent Beef NRC

  • Not as detailed output as UK Beef Ration

    • Advised to use as an Evaluator


Cowculator1

Cowculator

  • Download at:

    • http://www.ansi.okstate.edu/exten/cowculator/

  • Excel based spreadsheet


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