Deterministic Three-Half-Order Kinetic Model for Microbial Degradation of Added Carbon Substrates in Soil

Author:

Brunner Walter1,Focht Dennis D.1

Affiliation:

1. Department of Soil and Environmental Sciences, University of California, Riverside, California 92521

Abstract

The kinetics of mineralization of carbonaceous substrates has been explained by a deterministic model which is applicable to either growth or nongrowth conditions in soil. The mixed-order nature of the model does not require a priori decisions about reaction order, discontinuity period of lag or stationary phase, or correction for endogenous mineralization rates. The integrated equation is simpler than the integrated form of the Monod equation because of the following: (i) only two, rather than four, interdependent constants have to be determined by nonlinear regression analysis, (ii) substrate or product formation can be expressed explicitly as a function of time, (iii) biomass concentration does not have to be known, and (iv) the required initial estimate for the nonlinear regression analysis can be easily obtained from a linearized form rather than from an interval estimate of a differential equation. 14 CO 2 evolution data from soil have been fitted to the model equation. All data except those from irradiated soil gave better fits by residual sum of squares (RSS) by assuming growth in soil was linear (RSS = 0.71) as opposed to exponential (RSS = 2.87). The underlying reasons for growth (exponential versus linear), no growth, and relative degradation rates of substrates are consistent with the basic mechanisms from which the model is derived.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference21 articles.

1. Beck J. V. and K. J. Arnold. 1977. Parameter estimation in engineering and science. John Wiley & Sons Inc. New York.

2. Belser L. W. and E. L. Schmidt. 1978. Nitrification in soils p. 348-351. In D. Schlesinger (ed.) Microbiology-1978. American Society for Microbiology Washington D.C.

3. Draper N. R. and H. Smith. 1981. Applied regression analysis p. 458-517. John Wiley & Sons Inc. New York.

4. The analysis of progress curves for enzyme-catalysed reactions by non-linear regression;Duggleby R. G.;Biochim. Biophys. Acta,1977

5. Greaves M. P. N. J. Poole K. H. Domsch G. Jagnow and W. Verstraete. 1980. Recommended tests for assessing the sideeffects of pesticides on the soil microflora. Tech. Rep. 59. Agricultural Research Council Weed Research Organization Oxford United Kingdom.

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