Abstract
Topographic influence on gross soil N transformation was investigated along a slope on a conifer plantation forest. The half of minelarized N was immobilized and the half was left in NH4+ pool at the upper part of the slope, while 93 % of minelarized N was used for immobilization or nitrification at the lower part of the slope. From the similarity of microbial biomass and microbial C/N, microbial flora was similar among the sites. However, the gross mineralization rate was four times faster below 15 m than above 30 m. It indicated that the substrate was decomposable below 15 m. At the upper part of the slope with Oa horizon, humified organic matter with high C/N would be resistible for microbes. It resulted in relatively slow N cycling.
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References
Davidson, E. A., Hart, S. C., and Firestone, M. K. (1992): Internal cycling of nitrate in soils of a mature coniferous forest. Ecology, Vol. 73, pp. 1148–1156.
Hart, S. C., Nason, G. E., Myrold, D. D. and Perry, D. A. (1994): Dynamics of gross nitrogen transformations in an old-growth forest: the carbon connection. Ecology, Vol. 75, pp. 880–891.
Hirobe, M., Tokuchi, N. and Iwatsubo, G. (1998a): Spatial variability of soil N transformations along a slope. (SSSA in reviewing).
Hirobe, M., Koba, K., Tokuchi, N. and Iwatsubo, G. (1998b): Topographic differences of soil N transformations along a slope. (in this issue).
Jackson, L. E., Schimel, J. P. and Firestone, M. K. (1989): Short-term partitioning of ammonium and nitrate between plants and microbes in an annual grassland. Soil Biology and Biochemistry, Vol. 21, pp. 409–415.
Jenkinson, D. S. and Powlson, D. S. (1976): The effects of biocidal treatments on metabolism. V A method for measuring soil biomass. Soil Biology and Biochemistry, vol. 8, pp. 209–231.
Keeney, D. R. and Nelson, D. W. (1982): Nitrogen-inorganic forms. pp. 643–698. In Page, A. L. et al. (ed.) Methods of soil analysis. Part 2. American Society of Agronomy, Inc., Soil Sci. Soc. Amer. Inc. 1159 pp. Madison.
Killham, K. (1994): Soil ecology. Cambridge University Press. 242 p. Cambridge.
Nishio, T., Kanamori, T. and Fujimoto, T. (1985): Nitrogen transformations in an aerobic soil as determined by a 15NH4+ dilution technique. Soil Biology & Biochemistry, vol. 17, pp. 149–154.
Schimel, D. S. (1988): Calculation of microbial growth efficiency from 15N immobilization. Biogeochemistry, vol. 6, pp. 239–342.
Schimel, D. S. and Firestone, M. K. (1989): Inorganic N incorporation by coniferous forest floor material. Soil Biology Biochemistry, vol. 21, pp. 41–46.
Stevenson, F. J. (1982): Humus Chemistry. Wiley, New York.
Tietema, A. and Wessel, W. W. (1992): Gross nitrogen transformations in the organic layer of acid forest ecosystems subjected to increased atmospheric nitrogen input. Soil Biology Biochemistry, vol. 24, pp. 943–950.
Tietema, A., De Boer, W., Riemer, L. and Verstraten, J. M. (1992): Nitrate production in nitrogen saturated acid forest soil: vertical distribution and characteristics. Soil Biology Biochemistry, vol. 24, pp. 235–240.
Tokuchi, N., Takeda, H. and Iwatsubo, G. (1993): Vertical changes in soil solution chemistry in soil profiles under coniferous forest. Geoderma, vol. 59, pp. 57–73.
Wessel, W. W. and Tietema, A. (1992): Calculation gross N transformation rates of 15N pool dilution experiments with acid forest litter: Analytical and numerical approaches. Soil Biology Biochemistry, vol. 24, pp. 931–942.
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Tokuchi, N., Hirobe, M., Koba, K. (1998). Gross Soil N Transformations in a Coniferous Forest in Japan. In: Sassa, K. (eds) Environmental Forest Science. Forestry Sciences, vol 54. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5324-9_25
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DOI: https://doi.org/10.1007/978-94-011-5324-9_25
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