Net N mineralization in agricultural soils: experimentally parameterized modelling for N fertilizer recommendations and inhibition effects in soils with specific former land-uses

Publikation: Qualifikations-/StudienabschlussarbeitHabilitationsschrift

Autoren

  • Sabine Heumann

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Details

OriginalspracheEnglisch
QualifikationDoctor habilitatus
Gradverleihende Hochschule
Betreut von
  • Jürgen Böttcher, Betreuer*in
ErscheinungsortHannover
PublikationsstatusVeröffentlicht - 2019

Abstract

This habilitation thesis is focusing on improving site- and year-specific modelling of net N mineralization in agricultural soils of Northern Germany for online N fertilizer recommendation purposes. The overall goal of the studies were to experimentally parameterize and evaluate a net N mineralization model allowing site-specific online parameterization. Futhermore, substances and processes possibly involved in unusually low net N mineralization in soils with specific former land uses, that are relatively rich in total organic C and N, were elucidated in order to adequately account for it in simulations. The synopsis is dedicated to merge the results from the six included papers plus a description of the achieved model applications, potential model limitations as well as the current working hypothesis on the mode of action of the inhibiting soil organic substances.

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