Greenhouse gas emissions from synthetic nitrogen manufacture and fertilization for main upland crops in China

Table 4 Estimated average annual greenhouse gas (GHG) emissions from synthetic N manufacture and fertilization for wheat and maize in China (2015–2017)

	Wheat	Maize
GHG emissions from urea manufacture (Mt CO₂-eq year⁻¹)	23.42 ± 0.19	34.07 ± 1.00
GHG emissions from CF manufacture (Mt CO₂-eq year⁻¹)	12.47 ± 0.70	17.49 ± 2.34
GHG emissions from DAP manufacture (Mt CO₂-eq year⁻¹)	4.03 ± 0.13	5.89 ± 0.34
GHG emissions from ABC manufacture (Mt CO₂-eq year⁻¹)	1.53 ± 0.43	2.25 ± 0.12
Direct N₂O emissions from the soil (Gg N₂O year⁻¹)	35.82 ± 1.20	69.44 ± 4.26
Total national GHG emissions (Mt CO₂-eq year⁻¹)	52.11 ± 0.93	80.40 ± 4.88

ISSN: 1750-0680