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Analysis of soil nitrogen mineralization as estimated by exponential models

Abstract : The simple and the double exponential models used to describe the soil N mineralization process were analyzed by using a central finite differences approximation. Various investigators have found that these models show deficiencies in estimating the mineralization N pools. This paper investigates the possible causes or such deficiencies. The mineralization rate was observed to decrease continuously as the N mineralization proceeds. As long as the incubation time became greater, the estimated size of the mineralizable N pool was larger and the estimated mineralization rate became smaller. These results suggested that the exponential models did not conform to the actual N mineralization process and that the assumption of the existence of discrete size pools of mineralizable N is a faulty concept.
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Submitted on : Monday, June 1, 2020 - 6:42:31 PM
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Jorge Sierra. Analysis of soil nitrogen mineralization as estimated by exponential models. Soil Biology and Biochemistry, Elsevier, 1990, 22 (8), pp.1151-1153. ⟨10.1016/0038-0717(90)90042-X⟩. ⟨hal-02713155⟩



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