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Plant and Soil

, Volume 68, Issue 3, pp 379–388 | Cite as

Optimized N-mineralization parameters of loess soils from incubation experiments

  • J. Richter
  • A. Nuske
  • W. Habenicht
  • J. Bauer
Article

Summary

Nitrogen mineralization from long term incubation experiments with dried loess soils from southern Lower Saxony has been split by an optimization procedure into three contributing fractions: one from the resistant organic material (index rpm), another from decomposable plant residues (index dpm), and a third one from autolyzing microbial biomass (index bom). The nitrogen contents at the end of February averages 650 kg nitrogen per hectare and the 30 cm arable layer for the rpm, 30 to 50 kg N/ha for the dpm and about 65 kg N/ha for microbial biomass. The corresponding mean reaction coefficients at 35°C are .0058, .16 and about .35 per day, respectively. A rough approximation of the temperature dependence of the reaction coefficients has also been estimated.

Key words

Mathematical model Nitrogen mineralization Parameter optimization 

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Literature

  1. 1.
    Anderson J P E and Domsch K H 1978 A physiological method for the quantitative measurement of microbial biomass in soils. Soil Biol. Biochem. 10, 215–221.Google Scholar
  2. 2.
    Bremner J M 1965 Nitrogen availability indices.In Methods of soil analyses II ASA Madison, pp 1324–1345Google Scholar
  3. 3.
    Habenicht W 1981 Kurzzeit-Brutversuche mit Lössböden zur Beurteilung der Stickstoff-Mineralisierung im Frühjahr. Diplomarbeit, Universität Hannover.Google Scholar
  4. 4.
    Jenkinson D S and Powlson D S 1976 The effects of biocidal treatments on metabolism in soil. V. A method for measuring, soil biomass. Soil Biol. Biochem. 8, 209–213.Google Scholar
  5. 5.
    Jenkinson D S 1977 Studies on the decomposition of plant material in soil, IV. The effect of rate of addition. J. Soil Sci. 28, 417–423.Google Scholar
  6. 6.
    Jenkinson D S 1977 Studies on the decomposition of plant material in soil. V. The effects of plant cover and soil type on the loss of carbon from14C labelled ryegrass decomposing under field conditions. J. Soil Sci. 28, 424–434.Google Scholar
  7. 7.
    Jenkinson D S and Rayner J H 1977 The turnover of soil organic matter in some of the Rothamsted classical experiments. Soil Sci. 123, 298–305.Google Scholar
  8. 8.
    Mary B et Remy J C 1979 Essai d'appreciation de la capacite de mineralisation de l'azote des sols de grande culture I.-Signification des cinetiques de mineralisation de la matiere organique humifiee. Ann. Agron. 1979, 513–527.Google Scholar
  9. 9.
    Nuske A and Richter J 1981 N-mineralization in Loess-Parabrownearthes: Incubation experiments. Plant and Soil 59, 237–247.Google Scholar
  10. 10.
    Richter J, Nuske A, Boehmer U and Wehrmann J, 1980 Simulation of nitrogen mineralization and transport in Loess-Parabrownearthes: Plot experiments. Plant and Soil 54, 329–337.Google Scholar
  11. 11.
    Richter J, Nuske A and Fiege E 1982 N-mineralization in Loess-Parabrownearthes during the winter: Field experiments. Plant and Soil to be submitted.Google Scholar
  12. 12.
    Silva J A and Bremner J M 1966 Determination and isotope-ratio-analysis of different forms of nitrogen in soils: 5. Fixed ammonium. SSSA Proc. 30 587–594.Google Scholar
  13. 13.
    Stanford G and Smith S J 1972 Nitrogen mineralisation potentials of soils. Soil Sci. Soc. Am. Proc. 36, 465–472.Google Scholar
  14. 14.
    Stanford G, Frere M H and Schwaninger D E 1973 Temperature coefficient of soil nitrogen mineralization. Soil Sci. 115, 321–323.Google Scholar
  15. 15.
    Stenina T A 1964 Decomposition of plant residues in arable podzolic soils. Sov. Soil Sci. 64.Google Scholar
  16. 16.
    Tchan Y T 1959 Study of soils algae. III. Bioassay of soil fertility by algae. Principle of the method. VI. Congr. Intern. Sci. Soil Rapp. C, 249–251.Google Scholar

Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1982

Authors and Affiliations

  • J. Richter
    • 1
  • A. Nuske
    • 1
  • W. Habenicht
    • 1
  • J. Bauer
    • 1
  1. 1.Institut fuer Bodenkunde, Universitaet Hannover (TH)Fed. Rep. Germany

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