Group COAPA (UPM)

First Technical Conferences REDSIRENA.
Effect ofnitrification inhibitors on NUEandgaseous emissions
Group COAPA(UPM)
Technical Results (I)
N oxidesemissions andyield inirrigated maize
GuillermoGuardia
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Introduction
Experimental site and Methods
DMPP with organic sources (liquid fraction of pig slurry)
DMPSA with CAN: 2 years experiment
15N
experiment
Conclusions
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Noxides:N2OandNO
UssiriandLal(2012)
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Nitrification inhibitors
DCD,DMPP
Ruser etal.(2015)
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Hypothesis andaims:
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“ElEncín”field station
ENCÍN
Latitude
40°32´N
Texture
Sandyclayloam(clay,28%;silt,17%;sand,
55%)
Soil Taxonomy
CalcicHaploxerepts
pH
7,6
Bulk Density
1,41Mg/m3
Mean
Temperature
13,2 C
MeanRainfall
402mm
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Maize (Zeamays L.)
Sprinkler irrigation
Threereplicated completely randomized design
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N2Osampling
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NOsampling
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Fertilizer
Treatment
1st fertilization
2nd
fertilization
Control (C)
Urea (U)
U
Pig Urine (PU)
PU
U
Pig Urine+DMPP
(PU+NI)
PU+NI
U
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Nrate(kgNha1)
1st
2nd
fertilization fertilization Total
(5th May)
(17th June)
0
0
0
0
180
180
120
60
180
120
Group COAPA(UPM)
Main results:yield parameters
Abalos etal.(2014)
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180
TREATMENTS:
• Control:0N
• Urea
• Urea+urease inhibitor NBPT(UTEC)
• CAN
• CAN+nitrification inhibitor DMPSA
180kgNha1
2014and2015
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15NH NO
4
3
2microplots
1mx1m
NH415NO3
2treatments:
• AN
• AN+I(DMPSA)
98%atom 15N
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Thank you.Any question?
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