1. Coping With Alfalfa Winterkill Professor Randy Shaver Department of Dairy Science University of Wisconsin - Madison University of Wisconsin - Extension

2. Coping With Alfalfa Winterkill  Nutrition & Crop Advisor & Supplier relationships  Feed Inventory  Current & Projected (rolling)  Projected Needs  Minimize Shrink

3. Coping With Alfalfa Winterkill  Alternative Forages  Winter Wheat or Rye  Oats or Oats & Peas  Reduced Forage Diets  Minimum Forage Guidelines  Forage Replacers  High Corn Silage Diets

4. Alternative Forages

5. Average forage quality values for oats harvested at different maturity stages (Rankin, UWEX-FDL, 2003) Harvest StageCP%NDF% Boot16 - 1852 - 54 Heading14 - 1656 - 58 Milk12 - 1459 - 61 Dough10 - 1259 - 61

6. Impact of Small-Grain Silage Maturity Arieli & Adin, JDS, 1994 ItemEarly CutLate Cut Milk Yield, lb/d7972 11 days between early and late cut

7. Reduced Forage Diets

8. Min NDF - ForageMin NDF - DietMax NFC - Diet 19%27%42% 18%27%42% 17%29%40% 16%31%38% 15%33%36% NRC-01

9. %Diet forage to meet minimum NDF from forage Min. NDF-F40% NDF45% NDF50% NDF 19%48%42%38% 17%43%38%34% 15%38%33%30%

10. Silage Replacement

11. Ingredient NDF % of DM pef % NDF peNDF % of DM Replaced per lb. DM Replaced by 5 lb. DM Replaced Haylage Medium Chop Length 458538.3 -- Replacement Feeds Chopped Straw 73.011080.32.110.5 Chopped Hay 559552.31.47.0 Beet Pulp 45.83013.70.42.0 Brewers Grains 47.44019.00.52.5 Corn Gluten Feed 35.54014.20.42.0 Cottonseed Hulls 85.09076.52.010.0 Distillers Grains 38.84015.50.42.0 Malt Sprouts 47.04018.80.52.5 Soybean Hulls 60.33018.10.52.5 Wheat Middlings 36.74014.70.42.0 Whole Cottonseed 50.39045.31.26.0

12. By-Product Break-Evens

14. How much to feed?  Feeding limits  i.e. DDG at 10 to 20% of diet DM a reasonable target depending upon diet formulation constraints i.e. High Fat & P and Low Lysine impediments to higher inclusion rates  Least cost ration formulation for specified nutrients  i.e. CP, RUP, NDF, Starch, Fat, NEL, etc., etc.

15. Ingredient Suggested Limits lb. DM per cow per day Beet Pulp8 - 12 Brewers Grains5 - 10 Corn Gluten Feed10 - 15 Cottonseed Hulls5 - 10 Distillers Grains5 - 10 Malt Sprouts5 - 10 Soybean Hulls8 - 12 Wheat Middlings8 - 12 Whole Cottonseed5 - 8

16. High Corn Silage Diets

17. Adapted from Joe Lauer, UW Madison Agronomy Dept.

18. Kernel Processing Score ∆Worth 2 lb. Milk or 2 lb. Corn

19. Corn Silage Fermentation Increases Starch Digestibility

20. Visit UW Extension Dairy Cattle Nutrition Website http://www.uwex.edu/ces/dairynutrition /