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Effect of corn hybrids/traits on in-season optical sensing and NUE: 2006 experiences

Effect of corn hybrids/traits on in-season optical sensing and NUE: 2006 experiences. Jeff Vetsch and Gyles Randall Univ. of Minnesota Southern Research and Outreach Center Waseca, MN NUE Workshop, Monmouth IL August 9 – 10, 2007. Situation.

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Effect of corn hybrids/traits on in-season optical sensing and NUE: 2006 experiences

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  1. Effect of corn hybrids/traits on in-season optical sensing and NUE:2006 experiences Jeff Vetsch and Gyles Randall Univ. of Minnesota Southern Research and Outreach Center Waseca, MN NUE Workshop, Monmouth IL August 9 – 10, 2007

  2. Situation • Hybrid traits like YieldGard Corn Borer™, YieldGard Rootworm™ and YieldGard Plus™) provide protection against yield robbing pests in corn, but little is known about the effects these traits have on optical sensing, N uptake, and NUE in corn. Ken Ostlie

  3. Materials and Methods • Cropping systems (two sites) • Corn following corn and corn following soybean • Three factor factorial design • N management treatments • Control, preplant incorporated urea, split applied (PP+V6) • Corn hybrids • Three hybrid families • Traits • YieldGard Corn Borer and YieldGard Plus • Measurements • Yield, N conc. and uptake, NUE, NDVI, SPAD, plant heights, whole plant at V10, multi spectral, and more.

  4. Corn following soybean results • Significant differences for grain, stover, and silage yield for: • PP N vs. split applied • 0 of 3 • Hybrid family • 2 of 3 • Trait • 0 of 3 • Interactions • 5 of 12

  5. Corn following soybean results • Significant differences for grain and stover N conc., N uptake, and apparent N recovery for: • PP N vs. split applied • 0 of 5 • Hybrid family • 3 of 5 • Trait • 0 of 5 • Interactions • 7 of 20

  6. Corn following soybean results • Significant differences in corn plant height and NDVI (GreenSeeker) at V8 and V10, and SPAD meter at V10 and VT for: • PP N vs. split applied • 0 of 6 • Hybrid family • 6 of 6 • Trait • 2 of 6 • Interactions • 4 of 24

  7. Corn following soybean results • Significant differences in multi spectral data (NIR, Red, Green, NDVI, GNDVI, RVI, GRVI, and GVI) on July 13 (VT) for: • PP N vs. split applied • 0 of 8 • Hybrid family • 8 of 8 • Trait • 3 of 8 • Interactions • 13 of 32

  8. Corn following corn results • Significant differences for grain, stover, and silage yield for: • PP N vs. split applied • 0 of 3 • Hybrid family • 2 of 3 • Trait • 3 of 3 • Interactions • 5 of 12

  9. Corn following corn results • Significant differences for grain and stover N conc., N uptake, and apparent N recovery for: • PP N vs. split applied • 0 of 5 • Hybrid family • 4 of 5 • Trait • 4 of 5 • Interactions • 5 of 20

  10. Corn following corn results • Significant differences in corn plant height and NDVI (GreenSeeker) at V8 and V10, and SPAD meter at V10 and VT for: • PP N vs. split applied • 1 of 6 • Hybrid family • 6 of 6 • Trait • 5 of 6 • Interactions • 3 of 24

  11. Apparent N Recovery

  12. What does it all mean? • FIRST YEAR RESULTS • Hybrids can respond differently to N management practices • Preliminary implications for optical sensing and variable N application • Be careful on fields that contain refuges even if hybrid is in the same family

  13. Acknowledgement • The authors are most grateful to the Monsanto Corporation for financial assistance and thoughtful guidance during this research project.

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