bnf in sugarcane, ghg & impact of crop management - Fapesp
bnf in sugarcane, ghg & impact of crop management - Fapesp
bnf in sugarcane, ghg & impact of crop management - Fapesp
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N 2O Emission, kg N-N 2O/ha<br />
4<br />
3<br />
2<br />
1<br />
0<br />
N 2O = 0,0056x 2 + 0,0207x + 0,78<br />
R² = 0,99<br />
N 2O = 0,0496x + 0,692<br />
R² = 0,62<br />
0 5 10 15 20 25<br />
Sugarcane trash, t/ha<br />
Trash+v<strong>in</strong><br />
Trash<br />
N 2O emission from N<br />
fertilizer <strong>in</strong> <strong>sugarcane</strong> is<br />
with<strong>in</strong> or bellow the<br />
IPPC default value but<br />
the addition <strong>of</strong> organic<br />
residues caused<br />
<strong>in</strong>crease N 2O emission.<br />
Remov<strong>in</strong>g excess trash<br />
from the field (for<br />
energy production) may<br />
avoid high N 2O emission<br />
Increase <strong>of</strong> N emission factor for fertilizer N (ammonium nitrate surface-applied):<br />
Trash 0,04% per t/ha <strong>of</strong> trash left on soil<br />
Trash+v<strong>in</strong>asse 0,12% per t/ha trash left on soil
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