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Fertility of Vinifera Grapes in NC SERA 2008 Meeting

Fertility of Vinifera Grapes in NC SERA 2008 Meeting. David H. Hardy and John Havlin NCDA&CS and NC State. NC Wine Industry is Growing. 1985- 4 wineries 1986- NC Grape Council created 1999-15 wineries 2002- 25 wineries Today- over 70 wineries. NCDA Grape Recommendations. Soil testing

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Fertility of Vinifera Grapes in NC SERA 2008 Meeting

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  1. Fertility of Vinifera Grapes in NC SERA 2008 Meeting David H. Hardy and John Havlin NCDA&CS and NC State

  2. NC Wine Industry is Growing • 1985- 4 wineries • 1986- NC Grape Council created • 1999-15 wineries • 2002- 25 wineries • Today- over 70 wineries

  3. NCDA Grape Recommendations • Soil testing • Muscadine grapes • Plant tissue • Vinifera grapes at full bloom • Where did they come from???

  4. P Grape Recommendation

  5. K Grape Recommendation

  6. Present Liming & Fertilization

  7. Objectives • Evaluate nutrient status in common red and white vinifera varieties • Establish critical nutrient concentration ranges in both leaf and petiole samples • Correlate plant nutrient status with soil test information

  8. Additional Considerations • Effect of topography • Leaf-cluster position • Mature leaf at veraison

  9. 1 Black Wolf 12 Round Peak 13 Shelton 16 Surry CC • Creek Side • Grove • 8 Iron Gate 4 Flint Hill 7 Hanover Park 10 RagApple 11 RayLen • 2 Buck Shoals • 8 Laurel Gray • 9 Raffaldini • South Creek • South Mountain

  10. 0 – 4” Sampling away from fertilizer or lime application 4 – 8” Cecil fine sandy loam Fine, kaolinitic, thermic Typic Kandhapludults 8 – 24” 6 cores per variety

  11. 2006 • Upper 4 inch depth • Little variability 2007

  12. 2006 • Upper 4 inch depth • Little variability • Good lime practices 2007

  13. NC Vineyard Soils

  14. 2006 Mehlich STP ppm 2007

  15. 2006 Mehlich 3 K ppm 2007

  16. FB and veraison- all sites • 4 intensive sites- every 2 wk

  17. Petiole N Concentration Petiole N- % @ FB • 0 – 0.39 D • 0.4 – 0.79 L • 0.8 – 1.0 S • 1.01 – 1.25 H • 1.26 – 1.5 E FB Laurel Grey- 2007- select varieties

  18. Petiole P Concentration FB • Petiole P- % @ FB • 0 – 0.09 D • 0.1 – 0.14 L • 0.15 – 0.6 S • 0.61 – 1.0 H • 1.01 – 2.0 E Laurel Grey- 2007- select varieties

  19. Petiole K Concentration FB • Petiole K- % @ FB • 0 – 0.99 D • 1.0 – 1.49 L • 1.5 – 3.5 S • 3.51 – 4.5 H • 4.51 – 5.5 E Laurel Grey- 2007- select varieties

  20. Selected Tissue Levels P = 0.15 – 0.6 Sufficient K= 1.5 – 3.5 Sufficient

  21. Nutrient Content Relative to Cluster Position

  22. Topographic Effects on Nutrient Content

  23. 2008 • Maintain primary objectives – • ***increase # mountain sites • Quantify sampling error • Draft diagnostic nutrient ranges (???) • Assess nutrient response

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