Jeff Vetsch and Gyles Randall Univ. of Minnesota

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Jeff Vetsch and Gyles Randall University of Minnesota

Presentation transcript:

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 12/10/2018

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 12/10/2018

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. 12/10/2018

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 Interactions 5 of 12 12/10/2018

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 Interactions 7 of 20 12/10/2018

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 12/10/2018

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 12/10/2018

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 12/10/2018

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 Interactions 5 of 20 12/10/2018

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 12/10/2018

Apparent N Recovery Soybean Corn N Mgmt. - - - - % - - - - None Preplant 38 59 Split 44 57 Hybrid Family A 37 63 B 40 51 C 45 62 Trait YGCB 55 YG Plus 42 61 12/10/2018

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 12/10/2018

Acknowledgement The authors are most grateful to the Monsanto Corporation for financial assistance and thoughtful guidance during this research project. 12/10/2018