Abstract
The seasonal variation of nitrous oxide and methane fluxes and their relationships with soil inorganic nitrogen, dissolved organic carbon, and soil respiration were studied from typical dryland fields (winter wheat-cotton rotation and single winter wheat). The results showed that: i) The N2O flux from wheat-cotton and single wheat fields were 78.3 and 22.4 µg N2O-N/m2/h respectively through reviving to maturing stage under the wheat season. The N2O flux from soils was positively correlated with soil inorganic N under warmer temperature.; ii) The soil respiration may reflect the status of crop plants and roots’ growth and uptaking nutrients; iii) Soil dissolved organic carbon (DOC) could not exactly reflect the soil respiration intensity; iv) The daily variation of N2O flux and soil respiration was constant with daily temperature variation; v) The typical cropland was a weak net CH4 sink with the average flux of -0.008 ~ -0.026 µg CH4/m2/h (ranged from -0.107 to 0.03 µg CH4/m2/h). And the daily variation of CH4 flux was not regular with daily temperature variation. The mitigation options for N20 should be adopted mainly after N dressing was occurred especially under warmer temperature.
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© 2000 Springer Science+Business Media Dordrecht
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Liping, G., Erda, L., Zhongpei, L., Yanqing, W. (2000). The emission flux and mitigation options for N2O and CH4 from wheat fields under different rotation systems in Central China. In: van Ham, J., Baede, A.P.M., Meyer, L.A., Ybema, R. (eds) Non-CO2 Greenhouse Gases: Scientific Understanding, Control and Implementation. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9343-4_48
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DOI: https://doi.org/10.1007/978-94-015-9343-4_48
Publisher Name: Springer, Dordrecht
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