|
Fertilizer type
|
Non-renewable energy input per kg of produced nitrogen [kWh/ kg N]
|
Greenhouse gases emissions during production [t CO
2
eq. ha
−1
]
|
N
2
O emissions after application [kg CO
2
eq. kg
−1
of applied fertilizer]
|
N
2
O emissions after application [kg CO
2
eq. kg
−1
of inorganic N fertilizer equivalent]
|
Sum of greenhouse gas emissions [kg CO
2
eq. kg
−1
of inorganic N fertilizer equivalent]
|
|---|
|
Digestate, N derived from SNFa
|
-
|
-
|
2.98b
|
3.73
|
3.73
|
|
Inorganic nitrogen
|
16.17
|
6.032
|
2.98b
|
2.98
|
9.01
|
-
aFuel and energy for biogas plant operation belongs to methane production. bAccording to the IPCC scheme [10,12], the N2O emissions after application are similar but due to the lower efficiency, a higher amount is needed. So, the relevant value is the emission per kg of replaced mineral fertilizer (next column).
