A flexible tool for simulation of soil carbon turnover

被引:35
作者
Petersen, BM
Olesen, JE
Heidmann, T
机构
[1] Danish Inst Agr Sci, Res Ctr Foulum, Dept Agr Syst, DK-8830 Tjele, Denmark
[2] Danish Inst Agr Sci, Res Ctr Foulum, Dept Crop Physiol & Soil Sci, DK-8830 Tjele, Denmark
关键词
soil organic matter; simulation model; C/N interaction; carbon isotopes; model complexity;
D O I
10.1016/S0304-3800(02)00034-0
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Existing models of soil organic matter (SOM) turnover are implemented within rigid and often complex modelling environments, which makes the testing of influence of SOM model structure a rather difficult task. A new soil carbon turnover simulation tool is presented (C-TOOL V. 1.0). It facilitates the construction of a wide range of user-definable SOM models based on linked SOM pools and a decay described for each pool by first order kinetics. Simulation of carbon isotopes C-13 and (14) is facilitated. No programming is necessary for defining or redefining models, as the model structure is given in set-up files. The program is fast, and can utilise a range of time-steps, which enhances the computation of steady level SOM contents. The ability Of C-TOOL to mimic and analyse an existing model was tested using the DAISY SOM-model as an example. It was found that both the reduction of the vertically layered SOM-model in DAISY to one layer, and the exclusion of C/N interactions only had small effects on the simulated development in soil carbon content during a 30-year period. This suggests that C/N interactions and vertical layering may initially be ignored when constructing and calibrating models for SOM turnover, which reduces model complexity and input demands considerably. The steady level carbon content was simulated for two soils and a range of management types. An analysis of the model's sensitivity in simulated steady level carbon content to variation in carbon-input and key parameters was performed, and simulated isotope tagging was demonstrated as a powerful method for analysing carbon flows. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1 / 14
页数:14
相关论文
共 45 条
  • [1] Abramowitz M., 1964, APPL MATH SERIES, V55
  • [2] Isotope discrimination during decomposition of organic matter: A theoretical analysis
    Agren, GI
    Bosatta, E
    Balesdent, J
    [J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1996, 60 (04) : 1121 - 1126
  • [3] Andren O, 1997, ECOL APPL, V7, P1226, DOI 10.1890/1051-0761(1997)007[1226:ITICBM]2.0.CO
  • [4] 2
  • [5] SOIL ORGANIC-MATTER TURNOVER IN LONG-TERM FIELD EXPERIMENTS AS REVEALED BY C-13 NATURAL ABUNDANCE
    BALESDENT, J
    WAGNER, GH
    MARIOTTI, A
    [J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1988, 52 (01) : 118 - 124
  • [6] BARTHOLOMEW W. V., 1960, Transactions 7th int. Congr. Soil Sci., V2, P471
  • [7] FLUCTUATIONS OF ATMOSPHERIC CARBON-14 CONCENTRATIONS DURING PAST CENTURY
    BAXTER, MS
    WALTON, A
    [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1971, 321 (1544): : 105 - &
  • [8] DEPLETION OF C-13 IN LIGNIN AND ITS IMPLICATIONS FOR STABLE CARBON ISOTOPE STUDIES
    BENNER, R
    FOGEL, ML
    SPRAGUE, EK
    HODSON, RE
    [J]. NATURE, 1987, 329 (6141) : 708 - 710
  • [9] Christensen B.T., 1996, EVALUATION SOIL ORGA, DOI [10.1007/978-3-642-61094-3, DOI 10.1007/978-3-642-61094-3_11]
  • [10] CHRISTENSEN BT, 1997, MILJOFORSKNING, V28, P43