The influence of biochar on nitrogen (N) transformation
processes in soil is not fully understood.
This study assessed the
influence of four biochars (wood and poultry manure biochars
synthesized at 400°C, nonactivated, and at 550°C, activated,
abbreviated...
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The influence of biochar on nitrogen (N) transformation
processes in soil is not fully understood.
This study assessed the
influence of four biochars (wood and poultry manure biochars
synthesized at 400°C, nonactivated, and at 550°C, activated,
abbreviated as: W400, PM400, W550, PM550, respectively)
on nitrous oxide (N2
O) emission and N leaching from an Alfisol
and a Vertisol.
Repacked soil columns were subjected to three
wetting–drying (W–D) cycles to achieve a range of water-filled
pore space (WFPS) over a 5-mo period.
During the first two
W–D cycles, W400 and W550 had inconsistent effects on N2
O
emissions and the soils amended with PM400 produced higher
N2
O emissions relative to the control.
The initially greater N2
O
emission from the PM400 soils was ascribed to its higher labile
intrinsic N content than the other biochars.
During the third
W–D cycle, all biochar treatments consistently decreased N2
O
emissions, cumulatively by 14 to 73% from the Alfisol and by
23 to 52% fr
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