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Table 2 Estimated average annual greenhouse gas (GHG) emissions from synthetic N manufacture for wheat and maize in different provinces of China (2015–2017)

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

Agricultural regionProvinceGHG emissions from synthetic N manufacture (Mt CO2-eq year−1)
WheatMaize
NECLiaoning3.32 ± 0.09
Jilin5.14 ± 0.10
Heilongjiang7.94 ± 0.68
NCHebei5.01 ± 0.124.23 ± 0.22
Shanxi1.16 ± 0.122.65 ± 0.14
Shandong6.65 ± 0.105.12 ± 0.29
Henan8.74 ± 0.203.99 ± 0.06
Inner Mongolia1.94 ± 0.196.35 ± 0.59
MLYRJiangsu4.86 ± 0.381.02 ± 0.12
Anhui4.14 ± 0.561.61 ± 0.20
Hubei1.22 ± 0.011.19 ± 0.05
NWCShaanxi2.03 ± 0.202.64 ± 0.17
Gansu1.36 ± 0.072.64 ± 0.17
Xinjiang2.98 ± 0.182.49 ± 0.12
SSWCChongqing0.75 ± 0.04
Sichuan0.86 ± 0.262.14 ± 0.34
Guizhou1.62 ± 0.30
Yunnan0.49 ± 0.093.84 ± 0.36
Guangxi1.04 ± 0.06
  1. Values in the table represent mean ± standard deviation
  2. NEC Northeast China, NC North China, MLYR Middle and lower reaches of Yangtze River, NWC Northwest China, SSWC South and Southwest China