svend christensen, torben heisel and anne mette walter danish institute of agricultural sciences
DESCRIPTION
Overview of developments in precision weed management, issues of interest and future directions being considered in Europe. Svend Christensen, Torben Heisel and Anne Mette Walter Danish Institute of Agricultural Sciences. Input data. Output data. Point or zone model. Competition model. - PowerPoint PPT PresentationTRANSCRIPT
Overview of developments in precision weed management, issues of interest and future directions being considered
in EuropeSvend Christensen, Torben Heisel and
Anne Mette WalterDanish Institute of Agricultural Sciences
Input data Output data
Point or zone model
Competition model
PC-Plant Protection
Decision model
DAPS - Decision Algorithm for Patch Spraying
Input dataField namePositionWeed speciesWeed density (leaf area and plant density)Sowing dateSeed rateRow distanceVarietyCrop leaf areaGrowth stageHistorical data (weed species and yield data)Soil typeExpected pricesWeedEye measurementsSampling
Point or zone modelHerbicide choiceEconomic optimal treatmentCrop managementRelative weed leaf area
Competition modelWeed speciesPlant densityWeed leaf areaSowing dateSeed rateRow distanceVarietyCrop leaf areaCompetition parametersEstimated yield loss
PC-Plant ProtectionWeed speciesPlant densityGrowth stageHerbicide parametersFind useable herbicides
Decision modelEstimated yield lossSowing dateSeed rateRow distanceVarietyPhysical weed control methodsHerbicide parametersCostPotential crop yieldEstimate yield gainEstimate efficacy
Output dataTreatment maps (chemical or physical)Yield gain mapEfficacy mapOptimal row distance mapWeed map(s) before and after treatmentOptimal seed rate mapGeostatisticKrigingGIS
MathCad dokument
1/3 N 1/1 N1/10 N1.5 1 0.5 00
20
40
60
80
100
alpha=-2, beta=-4alpha=-1.5, beta=-4alpha=-1, beta=-4alpha=-0.5, beta=-4alpha=-2, beta=-1alpha=-1.5, beta=-1alpha=-1, beta=-1alpha=-0.5, beta=-1
Log 10 dose
% b
iom
ass r
espo
nse
redu
ctio
n
1/10 N 1/3 N 1/1 N
Grid weed mapping (A)
. . . .
. . . . . . . .
10.6
0.20.6
0.2
1
Weed MapsWeed Maps
55.422
55.424
55.426
0
1
2
3
4
Plan
ts p
rer m
2
11.906 11.910 11.91455.422
55.424
55.426
0102030405060708090100
Plan
ts p
rer m
2
11.906 11.910 11.91407142128354249566370
Plan
ts p
rer m
2
0481216202428323640
Plan
ts p
rer m
2
Stell
aria
media
Brass
ica na
pus
Tripl
euro
sper
mu
m inido
rum
Grass
spp.
Tribenuron-methyl 500 g a.i./kg
Ioxynil + Bromoxynil 200 g a.i./l
Dose: 0.1 - 1.7 Tablet /haMean dose: 1.1 Tablet /ha
Dose: 0 - 1 l/haMean dose: 0.2 l/ha
Treatment maps for injection Treatment maps for injection sprayingspraying
Hardi sprayer with a Raven injection system
Patch SprayingPatch Spraying