Pollutants emission from crop straw field burning in subtropical region of China during 2005~2014
YANG Xia-jie1,2, JU Yuan-hua1,2, JIN Quan-feng1,2, TIAN Chao1,2, CAI Qi-jun1,2, GUO Fu-tao1,2
1. College of Forest, Fujian Agriculture and Forest University, Fuzhou 350002, China;
2. Collaborative Innovation Center of Soil and Water Conservation in Red Soil Region of the Cross-Strait, Agriculture and Forest University, Fuzhou 350002, China
The emission factors of CO, CO2, NOx, CxHy and PM2.5 in rice, wheat, beans, rape, maize and cotton were measured by indoor simulation experiment. In addition, the crop straw yield and the amount of field combustion were calculated, based on the statistical yearbook, in order to estimate total emissions of various types of pollutants from open burning of straw in eight provinces of subtropical China during 2005~2014, and temporal and spatial trends were analyzed. The results showed that the average emission factors of CO, CO2, NOx, CxHy and PM2.5 from combustion of crop straw were 159.55, 1234.96, 1.88, 31.27 and 7.62g/kg, respectively. The highest average emission factor of each pollutant was for cotton (172.40g/kg), beans (1348.77g/kg), rape (4.08g/kg), rice (66.78g/kg) and beans (10.15g/kg). The output of crop straw and the total amount of field combustion in subtropical areas of China were 1221.281Mt and 261.729Mt, respectively during the study period. Emissions of CO, CO2, NOx, CxHy and PM2.5 were 40890.56, 324104.01, 370.79, 14329.36 and 1835.94kt, respectively. The emissions of NOx and other pollutants from rice straw burning in the field accounted for more than 60% and 75% of the total emission in the study area. The emission contribution of wheat and cotton was less than 5% of the total emitted pollutants. There was also spatial variation in emission of different pollutants. The emission of pollutant exhibited a downward trend in Zhejiang, Fujian and Guizhou while rising trend was observed in Guangdong, Guangxi, Yunnan and Jiangxi.
杨夏捷, 鞠园华, 靳全锋, 田超, 蔡奇均, 郭福涛. 中国亚热带地区2005~2014年秸秆露天燃烧排放污染物[J]. 中国环境科学, 2017, 37(11): 4052-4061.
YANG Xia-jie, JU Yuan-hua, JIN Quan-feng, TIAN Chao, CAI Qi-jun, GUO Fu-tao. Pollutants emission from crop straw field burning in subtropical region of China during 2005~2014. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(11): 4052-4061.
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