Modelling soil water content variations under drought stress on soil column cropped with winter wheat

Title:

Modelling soil water content variations under drought stress on soil column cropped with winter wheat

Creator:

Csorba, Szilveszter, Raveloson, Andrea, Tóth, Eszter, Nagy, Viliam, and Farkas, Csilla

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:36869738-31aa-4ed3-afa9-0c27f4ae9607
uuid:36869738-31aa-4ed3-afa9-0c27f4ae9607
doi:10.2478/johh-2014-0036

Subject:

climatic room, SWAP model, soil water balance elements, drought stress, and temporal variability of soil properties

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Mathematical models are effective tools for evaluating the impact of predicted climate change on agricultural production, but it is difficult to test their applicability to future weather conditions. We applied the SWAP model to assess its applicability to climate conditions, differing from those, for which the model was developed. We used a database obtained from a winter wheat drought stress experiment. Winter wheat was grown in six soil columns, three having optimal water supply (NS), while three were kept under drought-stressed conditions (S). The SWAP model was successfully calibrated against measured values of potential evapotranspiration (PET), potential evaporation (PE) and total amount of water (TSW) in the soil columns. The Nash-Sutcliffe model efficiency coefficient (N-S) for TWS for the stressed columns was 0.92. For the NS treatment, we applied temporally variable soil hydraulic properties because of soil consolidation caused by regular irrigation. This approach improved the N-S values for the wetting-drying cycle from -1.77 to 0.54. We concluded that the model could be used for assessing the effects of climate change on soil water regime. Our results indicate that soil water balance studies should put more focus on the time variability of structuredependent soil properties.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

269-276

Source:

Journal of hydrology and hydromechanics | 2014 Volume:62 | Number:4

Harvested from:

CDK

Metadata only:

false