Table 1 Total N2O-N release, N emitted as N2O, % difference comparative to urea and yield scaled N2O emissions in soils amended with sole urea or urea + biochar.

From: Influence of variable biochar concentration on yield-scaled nitrous oxide emissions, Wheat yield and nitrogen use efficiency

Treatment

N2O

emission

(kg N ha−1)

N emitted as N2O

of the applied N (%)

% difference over urea

Yield-scaled N2O emission

% difference over urea

Control

0.05 ± 0.02e

 

–

  

Urea

0.67 ± 0.12a

0.41

–

7.4 ± 0.7a

 

B 5

0.21 ± 0.08d

0.10

   

B 10

0.22 ± 0.09d

0.11

   

Urea + B 5

0.50 ± 0.13b

0.30

− 27

4.9 ± 0.4b

34

Urea + B 10

0.46 ± 0.12c

0.27

− 35

4.0 ± 0.5bc

46

  1. Within columns, means followed by the same letter are not significantly different at P < 0.05.
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