Nitrous Oxide Emissions from

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Nitrous Oxide Emissions from Biochar Amended
Agronomic Soils (Preliminary results and ongoing
research) Kelly Hanley, Johannes Lehmann, Akio
Enders, David Guerena, John Duxbury, Charles
Hyland
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90
50
90
70
90
90
50
90
50
T1 90
0BC
T2 90
3BC once
T3 90
12BC once
T4 90
30BC once
T5 50
12BC once
T6 70
12BC once
100
100
70
100
50
70
100
90
90
T7 100
12BC once
T8 50
0BC
T9 70
0BC
T10 100
0BC
T11 90
1BC every year
70
50
90
70
90
90
90
90
90
T12 90
3BC banded
Number in field denotes amount of fertilizer in
of recommended
90
70
90
100
90
90
100
50
90
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Data Acquisition (N2O)

• Treatment 1 0 tons/ha biochar application rate
  90 fertilization
• (vs)
• Treatment 3 12 tons/ha biochar application rate
  90 fertilization
• Vented Static Chamber method for nitrous oxide
  capture
• 30 minute time intervals between subsequent
  samplings To,T30,T 60,T90
• Analyzed for concentration (ppmv) N2O via gas
  chromatography

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Averaged
Emissions BC 2.19ug/min/m2
(vs) -BC 2.60 ug/min/m2
45 reduction in N2O emissions with biochar
amended plots
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We are grateful to the Department of Crop and
Soil Sciences at Cornell University and within
that the Lehmann group as a whole.
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Biochar Application 2007