K. Freeman, B. Raun, K. Martin, R.Teal, D. Arnall, M. Stone, J. Solie
description
Transcript of K. Freeman, B. Raun, K. Martin, R.Teal, D. Arnall, M. Stone, J. Solie
By-Plant Prediction of Corn Forage By-Plant Prediction of Corn Forage Biomass and Grain Yield at Various Biomass and Grain Yield at Various
Growth Stages using NDVI and Growth Stages using NDVI and Plant HeightPlant Height
K. Freeman, B. Raun, K. Martin, K. Freeman, B. Raun, K. Martin, R.Teal, D. Arnall, M. Stone, J. R.Teal, D. Arnall, M. Stone, J.
Solie Solie
IntroductionIntroduction
Stone el al., 1996 found that N uptake could Stone el al., 1996 found that N uptake could be predicted in winter wheat using NDVI.be predicted in winter wheat using NDVI.
Varvel et al., 1997 noted that corn N status Varvel et al., 1997 noted that corn N status could be monitored using chlorophyll meters.could be monitored using chlorophyll meters.
Muchado et al., 2002 stated that in dry years, Muchado et al., 2002 stated that in dry years, plant height can explain 90% and 61% of the plant height can explain 90% and 61% of the variation of total dry and grain yield, variation of total dry and grain yield, respectively. respectively.
IntroductionIntroductiony = 151.13e3.6704x
R2 = 0.78
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0 0.2 0.4 0.6 0.8 1NDVI
Whe
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IntroductionIntroduction
Prediction of Corn Forage Biomass Prediction of Corn Forage Biomass Avenue for predicting final grain yieldAvenue for predicting final grain yield Estimate Corn Silage in the FieldEstimate Corn Silage in the Field
Prediction of Corn Forage N UptakePrediction of Corn Forage N Uptake Prediction of Corn Grain YieldPrediction of Corn Grain Yield
Ability to predict corn grain yield will help to Ability to predict corn grain yield will help to prescribe N rates mid-seasonprescribe N rates mid-season
These rates can be predicted on a by-plant basisThese rates can be predicted on a by-plant basis
ObjectiveObjective To determine the feasibility of by-To determine the feasibility of by-
plant sensor data collected at various plant sensor data collected at various stages of corn development for stages of corn development for predicting corn forage biomass, N predicting corn forage biomass, N uptake, and corn grain yield.uptake, and corn grain yield.
MethodsMethods
INSEY_DFP = NDVI / Days from INSEY_DFP = NDVI / Days from Planting to SensingPlanting to Sensing
INSEY_GDD = NDVI / Cumulative INSEY_GDD = NDVI / Cumulative GDD from Planting to SensingGDD from Planting to Sensing
GDD = (TempGDD = (Tempmin min + Temp+ Tempmaxmax /2) – 40 F /2) – 40 F Regression analysis performed using Regression analysis performed using
an exponential modelan exponential model
MethodsMethods
• A GreenSeeker A GreenSeeker Sensor was Sensor was mounted on a mounted on a bicyclebicycle• A shaft encoder A shaft encoder was used to assign was used to assign distance to each distance to each sensor readingsensor reading• Readings were Readings were taken once per taken once per centimetercentimeter
MethodsMethods
• Plant Height measurements were taken at each sensor reading and clipping• Heights were measured by extending the last collared leaf upright
MethodsMethods
Area Calculation for Plant 2 Area = ½(10) + ½(30)* Row Spacing
Then, Area = (5 cm + 15cm)* 76cm= 1520 cm2
23
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30cm
10cm
ResultsResults3 stages, 2 locations, 2 years
R2 = 0.19
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0 0.2 0.4 0.6 0.8 1NDVI
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ha
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04EFAW VT_04Perkins VT_04EFAW VT-R1_03Perkins VT-R1_03EFAW R1_04Perkins R1_04
V8-V10 Growth StagesR2 = 0.59
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Yiel
d kg
ha
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
ResultsResults
V8-V10 Growth StagesR2 = 0.66
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ptak
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ha
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
ResultsResultsV8-V10 Growth Stages
R2 = 0.6
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Height, cm
Yiel
d kg
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
V8-V10 Growth StagesR2 = 0.4
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Height, cm
N u
ptak
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
ResultsResults
V8-V10 Growth StagesR2 = 0.68
0500
100015002000250030003500400045005000
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NDVI*Height
Yiel
d kg
ha
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
V8-V10 Growth StagesR2 = 0.60
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NDVI*Height
N U
ptak
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
ResultsResults
VT-R1 Growth StagesR2 = 0.42
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EFAW VT-R1_03Perkins VT-R1_03EFAW VT 04EFAW R1_04Perkins R1_04Perkins VT_04
VT-R1 Growth StagesR2 = 0.61
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EFAW VT-R1_03
Perkins VT-R1_03
EFAW VT 04
EFAW R1_04
Perkins R1_04
Perkins VT_04
ResultsResults
VT-R1 Growth StagesR2 = 0.60
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Height, cm
Yiel
d kg
ha
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EFAW VT-R1_03Perkins VT-R1_03EFAW VT 04EFAW R1_04Perkins R1_04Perkins VT_04
VT-R1 Growth StagesR2 = 0.60
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Height, cm
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ptak
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EFAW VT-R1_03Perkins VT-R1_03EFAW VT 04EFAW R1_04Perkins R1_04Perkins VT_04
ResultsResultsVT-R1 Growth Stages
R2 = 0.64
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NDVI*Height
Yiel
d kg
ha
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EFAW VT-R1_03Perkins VT-R1_03EFAW VT_04EFAW R1_04Perkins R1_04Perkins VT_04
VT-R1 Growth StagesR2 = 0.77
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NDVI*Height
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ptak
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EFAW VT-R1_03Perkins VT-R1_03EFAW VT 04EFAW R1_04Perkins R1_04Perkins VT_04
ResultsResultsV8
R2 = 0.54
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in Y
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Perkins 04EFAW 04
V10R2 = 0.71
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Perkins 04EFAW 04
R1R2 = 0.46
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Perkins 04EFAW 04
R6R2 = 0.04
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Perkins 04EFAW 04
ResultsResultsV8
R2 = 0.59
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0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016INSEY_DFP
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Perkins 04
EFAW 04
V10R2 = 0.71
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0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016INSEY_DFP
Gra
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kg
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Perkins 04EFAW 04
R1R2 = 0.51
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0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016INSEY_DFP
Gra
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Perkins 04EFAW 04
ResultsResultsV8
R2 = 0.58
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0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006INSEY_GDD
Gra
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kg
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Perkins 04EFAW 04
V10R2 = 0.71
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0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006INSEY_GDD
Gra
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ield
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Perkins 04EFAW 04
R1R2 = 0.5
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0.0000 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006INSEY_GDD
Gra
in Y
ield
kg
ha -1
Perkins 04EFAW 04
ResultsResults
2 Locations, 2004
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V8 R2 = 0.32VT R2 = 0.81R1 R2 = 0.75
ResultsResults2 Locations, 2004
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NDVI*Height
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V8 R2 = 0.59V11 R2 = 0.76R1 R2 = 0.69
ConclusionsConclusions NDVI was a better predictor of forage NDVI was a better predictor of forage
yield at early growth stages yield at early growth stages N uptake was correlated with NDVI at N uptake was correlated with NDVI at
early and later growth stagesearly and later growth stages The product of NDVI and Plant Height The product of NDVI and Plant Height
improved the ability to predict forage improved the ability to predict forage and N uptakeand N uptake
ConclusionsConclusions
Final grain yield was accurately Final grain yield was accurately predicted at the V10 and V8 growth predicted at the V10 and V8 growth stages.stages.
INSEY was slightly better than NDVI INSEY was slightly better than NDVI alone for predicting final grain yield.alone for predicting final grain yield.
There was no difference between There was no difference between INSEY_DFP and INSEY_GDD. INSEY_DFP and INSEY_GDD.
http://www.soiltesting.okstate.edu/SBNRC/SBNRC.phphttp://www.nue.okstate.edu
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V8V11R1R6
By-Plant Prediction of Corn Grain Yield with Sensor By-Plant Prediction of Corn Grain Yield with Sensor Reading taken from V8-R6 Growth Stages in 2004Reading taken from V8-R6 Growth Stages in 2004
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NDVI
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once
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tion%
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04Perkins V11_04
By-Plant Prediction of Corn Forage N Uptake By-Plant Prediction of Corn Forage N Uptake at V8-V11 Growth Stage using NDVI in 2003 at V8-V11 Growth Stage using NDVI in 2003
& 2004& 2004
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NDVI
Fora
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Upt
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kg h
a-1
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04Perkins V11_04
ResultsResults
V8-V10 Growth StagesR2 = 0.37
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INSEY_DFP
Yiel
d kg
ha
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EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
V8-V10 Growth StagesR2 = 0.31
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INSEY_GDD
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
ResultsResults
V8-V10 Growth StagesR2 = 0.58
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0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016
INSEY_DFP
Fora
ge N
upt
ake
kg h
a-1
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
V8-V10 Growth StagesR2 = 0.51
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20
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0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007
INSEY_GDD
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04
By-Plant Prediction of Corn Forage N uptake By-Plant Prediction of Corn Forage N uptake at V8-V11 Growth Stage using Plant Height at V8-V11 Growth Stage using Plant Height
in 2003 & 2004in 2003 & 2004
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Height, cm
Fora
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uup
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ha-1
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04Perkins V11_04
By-Plant Prediction of Corn Forage N Uptake at V8-By-Plant Prediction of Corn Forage N Uptake at V8-V11 Growth Stage using NDVI*Height in 2003 & V11 Growth Stage using NDVI*Height in 2003 &
20042004
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NDVI*Height
Fora
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Upt
ake
kg h
a-1
EFAW V8_03Perkins V8_03EFAW V10_03Perkins V10_03EFAW V8_04Perkins V8_04Perkins V11_04