Chinese Journal of Agrometeorology ›› 2013, Vol. 34 ›› Issue (06): 636-641.doi: 10.3969/j.issn.1000-6362.2013.06.003

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Impacts of Infrared Heating on CO2 Emission from Soybean Ecosystem

HU Zheng hua，CUI Hai ling，ZHOU Ying ping，CHEN Shu tao，SHEN Shuang he   

  1. 1Jiangsu Key Laboratory of Agricultural Meteorology & Yale NUIST Center on Atmospheric Environment，Nanjing University of Information Science & Technology，Nanjing210044，China；2College of Applied Meteorology，Nanjing University of Information Science & Technology，Nanjing210044；3School of Environmental Science and Engineering，Nanjing University of Information Science & Technology，Nanjing210044
  • Received:2013-04-17 Online:2013-12-20 Published:2014-05-06

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Abstract: To investigate the impact of infrared heating on CO2 emission from soil and soybean soil system，the field experiment was carried out during soybean growing season CO2 fluxes were measured by static dark chamber gas chromatograph method.The results showed that infrared heating 2℃（T）had a positive effect on soil CO2 fluxes，which increased by 87.21% during maturity stage，from 202.09±28.75mg·m-2·h-1 to 378.34±156.17mg·m-2·h-1，but no significant difference was found；T increased significantly the cumulative amount of CO2 from soil by 39.96%.In addition，the Q10（temperature sensitivity coefficients）for soybean soil system’s respiration under the control and T treatments were 0.68 and 2.54，respectively，while the Q10 for soil respiration were 4.22 and 1.68，respectively.The results suggest that infrared heating may lead to an increase in soil CO2 emission and the Q10 for soybean soil systems respiration，and a decrease in the Q 10 for soil respiration.This study will provide the base to estimate the regional farmland greenhouse gas emission.

Key words: Infrared heating, CO2 emissions, Soil, Q10, Static dark chamber gas chromatograph method