Abstract
The N2O emission in an onion field of clayey aquic soil in central Hokkaido was estimated to be 8 kg N ha-1 over the period from 1 April to 31 October 1995. This represents a loss of 3.0% of the total mineral N inputs. A large N2O loss of 6.0 kg N ha-1 occurred after an 80 mm rainfall at the beginning of August. Before the rain, N2O was produced only in the topsoil, while after the event, 19% of N2O loss occurred from the subsoil. But, the subsoil was not water-saturated completely. This N2O was probably produced in the interior of anaerobic aggregates after high NO3 leaching from the topsoil.
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© 1997 Kluwer Academic Publishers
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Hatano, R., Sawamoto, T. (1997). Emission of N2O from a clayey aquic soil cultivated with Onion plants. In: Ando, T., Fujita, K., Mae, T., Matsumoto, H., Mori, S., Sekiya, J. (eds) Plant Nutrition for Sustainable Food Production and Environment. Developments in Plant and Soil Sciences, vol 78. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0047-9_175
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DOI: https://doi.org/10.1007/978-94-009-0047-9_175
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