Diffusion analysis of N2O cycling in a fertilized soil
- 146 Downloads
The behavior of nitrous oxide (N2O) in fertilized soil was studied in terms of soil fluxes, the production rates at various depths and the turnover in soil. The diffusive losses of N2O to the atmosphere calculated from soil N2O profile compared favorably with the flux directly determined with a closed chamber technique. The estimate of N2O production rates at several depths demonstrated that the sites of N2O production was only near the soil surface. The calculated residence time of N2O in the entire soil column studied was only 1.4 hour during active emission period and less than 1 day even in the later period having trace N2O emission. The prolonged N2O emission observed after the active phase was due likely to a lasting N2O production rather than a supply from the soil N2O reservoir. The results suggested that most N2O in soil was emitted quite promptly to the atmosphere after its production. A minor role of soil as an N2O reservoir is emphasized from the viewpoint of the origin of groundwater N2O.
Unable to display preview. Download preview PDF.
- Cicerone R J (1987) Change in stratospheric ozone. Science 237: 35–42Google Scholar
- Conrad R, Seiler W & Bunse G (1983) Factors influencing the loss of fertilizer nitrogen into the atmosphere as N2O. J Geophys Res 88(C11): 6709–6718Google Scholar
- de Jong E & Schappert H J V (1972) Calculation of soil respiration and activity from CO2 profiles in the soil Soil Science 113: 328–333Google Scholar
- Kotake M & Kasuya M (1994) N2O in groundwater of agricultural area in Aichi Prefecture. 1994 Annual Meeting of the Japanese Society of Limnology p 56 Proceeding (in Japanese)Google Scholar
- Hillel D (1982) Introduction to Soil Physics. New York: Academic PressGoogle Scholar
- Minami K & Ohsawa A (1990) Emission of nitrous oxide dissolved in drainage water from agricultural land. In Bouwman A F (ed) Soils and the Greenhouse Effect, pp 503–509. Chichester: John Wiley & Sons Ltd.Google Scholar
- Osozawa S (1987) Measurement of soil-gas diffusion coefficient for soil diagnosis. Soil Physical Conditions and Plant Growth, Japan 55: 53–60 (in Japanese)Google Scholar
- Ueda S, Yoshinari T, Wada E & Ogura N (1991) Nitrogen stable isotope ratio of N2O in groundwater: a possible tool to determine the source mechanisms. J Chem Soc Jpn 5: 448–453 (in Japanese)Google Scholar
- Ueda S, Ogura N & Wada E (1991) Nitrogen stable isotope ratio of groundwater N2O. Geophys Res Lett 18: 1449–1452Google Scholar
- Yung Y L, Wang W C & Lacis A A (1976) Greenhouse effect due to atmospheric nitrous oxide. Geophys Res Lett 3: 619–621Google Scholar
- Watson R T, Rodhe H, Oeschger H & Siegenthaler U (1990) Greenhouse gases and aerosols. In: Houghton J T, Jenkins G J & Ephraums J J (eds) Climate Change, The IPCC Scientific Assessment, pp 1–40. Cambridge: Cambridge University PressGoogle Scholar