DNDC-CSW (Canadian Spring Wheat)

Kröbel et al. (2011) introduced a new empirical sub-model to DNDC named the Canadian Spring Wheat (CSW) sub-model (DNDC-CSW) to allow more accurate estimation of spring wheat growth and N uptake in Canadian agroecosystems.

CSWCanadian Spring WheatCanadian agroecosystems



Initial contribute: 2020-01-02


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Quoted from: Kröbel, R., W. Smith, B. Grant, R. Desjardins, C. Campbell, N. Tremblay, C. Li, R. Zentner, and B. McConkey. "Development and evaluation of a new Canadian spring wheat sub-model for DNDC." Canadian Journal of Soil Science 91, no. 4 (2011): 503-520. https://doi.org/10.4141/cjss2010-059 

      Development of the new crop growth routine began with the replacement of potential biomass growth and adjustment of biomass fraction C/N ratios (Table 2). Additionally, the biomass fraction estimates were modified (influencing daily crop nitrogen demand through differing C/N ratios) and root and grain fraction became subject to water stress. Next, we accounted for nitrogen in the grain seed and introduced a new concept to calculate root biomass distribution over depth and time. Finally, the simulated soil depth in the DNDC model was increased from 50 to 90 cm to more accurately account for wheat root growth.
Table 2 Differences between DNDC-CSW and the default DNDC crop growth model
      In order to make these changes in DNDC more flexible, we have kept the original crop growth model, but added a submodel as a stand-alone section in the DNDC source code. This submodel can easily be duplicated to create other crop-specific submodels, provided that the data are available for empirically fitting the described relationships.



DNDC-CSW team (2020). DNDC-CSW (Canadian Spring Wheat), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/ef812b72-9c4b-4e34-a793-4a5f278d6360


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