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rhizowheat

yield decline

#wheat #yield decline #rhizosphere #rhizosphere processes

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Duration: From Mar 1, 2020 until Feb 29, 2024
Region: Harste; Lower Saxony; Achterwehr; Schleswig-Holstein;

About the Project:

RhizoWheat - Rhizosphere processes and yield decline in wheat crop rotations

Project Aim

The project aims to elucidate and quantify key rhizosphere processes governing yield decline of double (triple) cropped wheat and to establish a model framework enabling the prediction of yield decline as a function of initial soil inoculum and environmental factors.

Motivation

Wheat yield increase ceased in many countries although breeding progress is still linear. Increasing portions of a second and third wheat in a crop rotation provide a possible explanation. The yield decline of double cropped wheat is often attributed to the detrimental effect of soil-borne pathogens, particularly Gaeumannomyces graminis var. tritici (take-all). Recent findings, however, indicate a broader shift of the rhizosphere microbiome as a consequence of wheat as a pre-crop. This shift may be involved in increased root senescence leading to yield decline. This supports the hypothesis that yield decline happens in some years without typical take-all symptoms.

Expected Results

A model framework enabling the prediction of yield decline as a function of initial soil inoculum and environmental factors.

Contact

  • Dr. Nora Honsdorf

    Christian-Albrechts-Universität zu Kiel, Institut für Pflanzenbau und Pflanzenzüchtung