Abstract: In order to determine the carbon emission intensity from crop residue by open burning in field in Hubei province, based on date of crop yield from 2009 to 2017 in Hubei province, the major crop residues output were calculated according to the ratio of residue/grain. Combined with the proportion of straw open burning, the amount of straw open burning of main crops in Hubei province from 2009 to 2017 was calculated, and the total amount of CO and CO₂ emissions and carbon emissions were further obtained according to relevant emission factors. The results showed that annually production of crop straw in Hubei province was about 32.65×10⁶ t/a; The amount of openly burned straw in the field was about 7.01×10⁶ t/a, which accounted 21.47% of the total production of crop straw, among them, the open burning amount of rice straw accounts for 49.37% of the open buring amount of crop straw. The total amount of CO and CO₂ emitted by the open burning of crop straw was 0.72×10⁶ t/a and 9.74×10⁶ t/a, respectively; The total carbon emission was 2.96×10⁶ t/a on average, and the total carbon emission from the open burning of rice, wheat, corn and rape straw was 1.47×10⁶ t/a, 0.50×10⁶ t/a,0.52×10⁶ t/a,0.48×10⁶ t/a, respectively.

Key words: straw, crops, open burning, carbon emission