Druckansicht der Internetadresse:

Fakultät für Biologie, Chemie und Geowissenschaften


Seite drucken

TinyMCE Upload

SP6: RhizoHistory

Historical yield of cereals


Yields of cereals vary in space and time because of environmental and management factors in combination with crop traits. We will identify the impact of wheat and maize varieties under climate change on yield, yield variability and underperformance in Bavaria in 1853 and in 1950 – today. Plant varieties and rhizosphere traits are expected to have changed considerably within the last decades and compared to the preindustrial time step. To identify the drivers of yield changes, we will spatially explicit reconstruct the time series of crop yields for the project’s case study regions and for complete Bavaria.

Main research questions:

  • Where and when do we find yield growth and stagnation?
  • Where and when do we find an increase in yield variability?
  • Which factors (environment, management and/or plant varieties) drive the spatial and temporal pattern of cereal yields between preindustrial times and today?


Our objectives are to analyse the yield changes of wheat and maize in time (1853 and in 1950 – today) and to identify spatial drivers for these changes. Moreover, we will reconstruct the distribution of wheat and maize varieties between 1950 and today.


We will use a (1) singular spectrum analysis to deconstruct the time series of crop yields between 1950 and today into general trends and short-term variability. Also, the year 1853 will be integrated into the analysis to assess the increase in yield between preindustrial time and industrial time in Bavaria. We will conduct (2) spatially corrected regressions for analysing the drivers of yield changes and variability. Explanatory variables are environmental factors (e.g., soil fertility, topography, landscape configuration and climate), management factors (e.g., fertilizer and pesticides) as well as plant varieties (influencing aboveground traits and rhizosphere traits). Finally, we will (3) consult experts and literature studies for reconstructing the spatiotemporal distribution of wheat and maize varieties.



Prof. Dr. Thomas Köllner

University of Bayreuth
Ecological Services
Universitätsstr. 30
95440 Bayreuth


Jakob Bogenreuther (PhD candidate)

University of Bayreuth
Ecological Services
Universitätsstr. 30
95440 Bayreuth



Diese Webseite verwendet Cookies. weitere Informationen