Soil Biology and Biochemistry
Molina, J.A.E., Department of Soil Science., University of Minnesota., 439 Borlaug Hall, St Paul, MN 55108, United States
Hadas, A., ARO, The Volcani Center. Bet Dagan., 50250, Israel
Clapp, C.E., USDA Agricultural Research Service, The Soil and Water Management Research Unit. St Paul., MN 55108, United States
Two contrasting hypotheses were stated to describe the How of soil N and C between organic, inorganic and microbial forms: either soil microbes incorporate and assimilate low molecular-weight nitrogenous compounds-direct hypothesis-or they are supplied by inorganic N exclusively: free or bound N organics are mineralized by deaminuses before they penetrate cells-mineralization-immobilization turnover (MIT) hypothesis. Tests of the hypotheses were performed by comparing experimental data describing N turnover and priming effect to those computed by process-oriented models representing the hypotheses. The tests indicated that the direct hypothesis could not account for the observed data. N turnover, under the MIT hypothesis, was higher than the one computed by the Kirkham and Bartholomew equations and remineralization of immobilized N was important. © 1990.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Computer simulation of nitrogen turnover in soil and priming effect
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Molina, J.A.E., Department of Soil Science., University of Minnesota., 439 Borlaug Hall, St Paul, MN 55108, United States
Hadas, A., ARO, The Volcani Center. Bet Dagan., 50250, Israel
Clapp, C.E., USDA Agricultural Research Service, The Soil and Water Management Research Unit. St Paul., MN 55108, United States
Computer simulation of nitrogen turnover in soil and priming effect
Two contrasting hypotheses were stated to describe the How of soil N and C between organic, inorganic and microbial forms: either soil microbes incorporate and assimilate low molecular-weight nitrogenous compounds-direct hypothesis-or they are supplied by inorganic N exclusively: free or bound N organics are mineralized by deaminuses before they penetrate cells-mineralization-immobilization turnover (MIT) hypothesis. Tests of the hypotheses were performed by comparing experimental data describing N turnover and priming effect to those computed by process-oriented models representing the hypotheses. The tests indicated that the direct hypothesis could not account for the observed data. N turnover, under the MIT hypothesis, was higher than the one computed by the Kirkham and Bartholomew equations and remineralization of immobilized N was important. © 1990.
Scientific Publication
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