Selecting Corn Silage Hybrids

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  • 1. Selecting Corn Silage HybridsNick RoyAdair County ExtensionAgent for Agriculture
  • 2. What Makes a Good Corn Silage Hybrid?
  • 3. Good Corn Silage?• Big Ear?• Tall?• Less than perfect stalk integrity?
  • 4. Good Corn Silage• Big Ear: 40-50% of yield, energy content• Tall: 1 ton per foot (w/o ear)• Less than perfect stalk integrity – Low lignin= lower NDF • More digestible= more milk
  • 5. What about?• Leafy – Only 10-12% of yield• Protein – Much cheaper than energy – Focus on energy!
  • 6. Ration 1• 70 lbs low energy/high protein corn silage• 7 lbs high quality alfalfa hay• 23 lbs grain @ $307.00/ton• 75 lbs milk
  • 7. Ration 2• 70 lbs high energy/low protein corn silage• 7 lbs high quality alfalfa hay• 21.1 lbs grain @ $287.00/ton• 75 lbs milk
  • 8. What is Energy?• ADF (acid detergent fiber) – Composed of cellulose and lignin – Lignin– indigestible – Relates inversely to digestibility• NDF (neutral detergent fiber) – Composed of hemicellulose, cellulose, and lignin – Relates inversely to intake• NEL – Net Energy for Lactation – Calculated from ADF Amaral-Phillips
  • 9. Corn Silage Averages Dairy One Forage Lab5/01/00 through 4/30/08
  • 10. Corn Silage A “minor” crop?• Only about 7% of corn in the U.S. is harvested for silage.• Historically, this has limited most seed companies’ interest in silage-only hybrids.
  • 11. UK Corn Silage Variety Trial• Purpose – Provide unbiased data on common corn silage varieties for growers to use to make hybrid selection decisions
  • 12. UK Corn Silage Variety Trial• Measurements – Yield – Quality – Disease – Miscellaneous • Grain • Stalk Integrity • Fertility
  • 13. UK Corn Silage Variety Trial• Locations – Adair County • South Central KY – Boyle County • Central KY – Mason County • Northern KY
  • 14. What’s Your Goal• Yield?• Quality?• Compromise?
  • 15. Milk Yield• Calculated from CP, NDF, Starch, Fat, & Ash – University of Wisconsin• Per Ton vs. Per Acre – Per Ton • Highest = Best Quality – Per Acre • Highest= Sometimes a Compromise • Yield X Milk Yield Per Ton
  • 16. †Table 1. Corn H ybrid Performance for Silage, Combined Sites, KY, 2010 1 2 3 3 4 5 Tons/A Milk Yield N EL N EG Quality, % DiseaseBrand H ybrid 35% DM lbs/Ton lbs/A Mcal/lb Mcal/lb CP ADF N DF Lignin GLS RustBecks 5675 HXR 22.9 3380 27000 0.81 0.55 7.4 21 37 3.3 1.6 0.6Becks 6733 HXR 25.2 3290 29000 0.83 0.56 7.3 20 36 3.2 1.2 0.8Caverndale Farms CF 868 3000GT 22.6 3350 26400 0.81 0.54 6.9 21 38 2.8 2.2 0.4Caverndale Farms CF 906 GT 22.6 3320 26200 0.76 0.5 7 24 42 3.2 0.7 0.8Caverndale Farms CF 926 GT 23.2 3470 28000 0.8 0.54 7.1 22 39 3 2 0.5DeKalb DKC 63-42 22.4 3420 26600 0.81 0.54 7.2 21 38 2.8 1.2 0.5DeKalb DKC 66-96 23.1 3200 25700 0.72 0.45 6.4 27 45 3.8 0.8 1Dyna Gro 58V69 22.9 3340 26800 0.79 0.52 7.1 22 40 3.1 0.8 0.3Dyna Gro V5683VT3 22.2 3380 26300 0.79 0.52 7 23 40 3.4 1.2 1.5Masters Choice MCT-6581 GT 21.6 3300 24900 0.78 0.51 7 23 40 2.8 1.2 0.5Masters Choice SP-590 RR 23.1 3150 25400 0.79 0.52 6.7 22 39 3.1 1 1Mycogen F2F665 18.6 3300 21500 0.76 0.5 6.7 26 44 3.4 3 0.6Mycogen TMF2H918 25.3 3250 28800 0.76 0.49 7.1 25 43 3.9 1 0NK Seeds N78N-3000GT 20.4 3600 25600 0.79 0.52 7.5 23 40 3.1 2.3 0.2NK Seeds N82V-3000GT 23.7 3450 28600 0.76 0.5 6.8 24 42 3.1 2.5 0.8Pioneer 31G70 21.4 3370 25000 0.8 0.53 6.9 21 39 2.7 1.2 0.6Pioneer P1615 HR 24 3200 26900 0.79 0.53 7.4 23 41 3.4 1.2 0.4Seed Consultants S 11HQ38 CS 22.5 3380 26600 0.8 0.53 7.4 22 38 3 1.2 0.5Seed Consultants S 11HQ39 CS 20.2 3500 24500 0.8 0.54 7 21 38 2.3 1.2 0.8Southern States S 775 RR2 S 22 3260 25100 0.83 0.55 6.8 19 35 2.8 1.2 0.4Southern States S 842 RR2 YGCB S 23.2 3400 27600 0.77 0.51 7.1 24 42 3.4 1.4 0.8Wyfells W8681 23.3 3520 28900 0.83 0.56 7 20 36 2.7 1 0.7Wyfells W9121 22.9 3430 27400 0.83 0.56 7.2 20 36 2.9 0.8 1.7 LS (0.10) D 2.3 2800 CV 10 10.2 Grand Mean 22.6 3350 26400 0.79 0.52 7 22 39 3 1.4 0.7
  • 17. Bargain Buys?
  • 18. Is it worth the savings? Additional Tons/AcreValue/Ton 1 2 3 4$ 25 $ 25 $ 50 $ 75 $ 100$ 30 $ 30 $ 60 $ 90 $ 120$ 35 $ 35 $ 70 $ 105 $ 140$ 40 $ 40 $ 80 $ 120 $ 160
  • 19. Thank You• Questions?