Articles | Volume 22, issue 4
https://doi.org/10.5194/hess-22-2449-2018
https://doi.org/10.5194/hess-22-2449-2018
Research article
 | 
23 Apr 2018
Research article |  | 23 Apr 2018

Root growth, water uptake, and sap flow of winter wheat in response to different soil water conditions

Gaochao Cai, Jan Vanderborght, Matthias Langensiepen, Andrea Schnepf, Hubert Hüging, and Harry Vereecken

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Cited articles

Albasha, R., Mailhol, J.-C., and Cheviron, B.: Compensatory uptake functions in empirical macroscopic root water uptake models – experimental and numerical analysis, Agr. Water Manage., 155, 22–39, https://doi.org/10.1016/j.agwat.2015.03.010, 2015. 
Allen, R. G., Jensen, M. E., Wright, J. L., and Burman, R. D.: Operational estimates of reference evapotranspiration, Agron J., 81, 650–662, 1989. 
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop Evapotranspiration – Guidelines for Computing Crop Water Requirements – FAO Irrigation and Drainage paper 56, FAO, Rome, 300, 6541, 1998. 
Amenu, G. G. and Kumar, P.: A model for hydraulic redistribution incorporating coupled soil-root moisture transport, Hydrol. Earth Syst. Sci., 12, 55–74, https://doi.org/10.5194/hess-12-55-2008, 2008. 
Bechmann, M., Schneider, C., Carminati, A., Vetterlein, D., Attinger, S., and Hildebrandt, A.: Effect of parameter choice in root water uptake models – the arrangement of root hydraulic properties within the root architecture affects dynamics and efficiency of root water uptake, Hydrol. Earth Syst. Sci., 18, 4189–4206, https://doi.org/10.5194/hess-18-4189-2014, 2014. 
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Short summary
Different crop growths had consequences for the parameterization of root water uptake models. The root hydraulic parameters of the Couvreur model but not the water stress parameters of the Feddes–Jarvis model could be constrained by the field data measured from rhizotron facilities. The simulated differences in transpiration from the two soils and the different water treatments could be confirmed by sap flow measurements. The Couvreur model predicted the ratios of transpiration fluxes better.