Primary Analysis in the Effects of Elevated [CO2] on Emission of CO2 from Rice Paddy Field

Abstract

Abstract: Elevated atmospheric CO2 concentration significantly increased crops biomass, which will input more carbon into soil to affect carbon stability and accumulation. This study was conducted indirectly in primary analysis of the effects of elevated CO2 on CO2 emission from different pools in rice paddy field based on the direct response of crops biomass to elevated CO2 and 13C isotope technique. Results show that in rice season elevated CO2 decreased the CO2 emission from field and not significant response was found. The effect of root on soil respiration was observed mainly before repining stage with fluctuation. Before earing stage, new organic matter was decomposed, more and elevated CO2 accelerate decomposing of old organic matter more from middle to end. High N level can improve the decomposing of old organic matter. Considering the shortage in this study, the same and more work would be carried out in following.

CLC Number:

S152.4

Ma Hongliang,, Zhu Jianguo, Xie Zubin, Kou Taiji, Liu Gang, Zeng Qing. Primary Analysis in the Effects of Elevated [CO2] on Emission of CO2 from Rice Paddy Field[J]. Chinese Agricultural Science Bulletin, 2007, 23(1): 176-176.

References

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