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subproject A: "Impact of innovation in plant architecture and carbon exchange on productivity and stabitity in different winter wheat cropping systems"

A technician shows the self-constructed stand for the simultaneous measurement of the incident radiation above and beneath the canopy. With this device, we make sure that both sensors measure simultaneously, are facing the same geographic direction and can be kept in defined, consistent heights.

The evaluation of winter wheat cultivars of the last 50 years will give insights in the structural and functional innovations of breeding in winter wheat. In detail, we are investigating whether changes in plant architecture and physiology  led to an optimization of light interception and photosynthetic efficiency. Further, we are interested in the effect of these changes on the  radiation-use efficiency.

At the field station of the Leibniz University Hannover the 220 cultivars are grown in three production systems (“low input”,” semi-intensive”, and “intensive”) and in two repetitions. Besides different phenotypic observations and the common yield parameters, we additionally measure the light interception with the LI 1900  and the leaf area index with the LAI 2200C both from LiCor non-destructivly at different time points (see image). Further promising results are expected from measurements with this sensor combination in different depth layers within the canopy. The data gives insight in the light distribution inside the canopy stand and allows us to make assumptions about the interaction of leaf and canopy architecture and the light interception and usage.

The potentially detected innovations could increase the resilience of future winter wheat cultivars in intensive as well as extensive productions systems. The potential will be tested and evaluated in crop models.

The big field trials will make it possible, to investigate the interaction between genotype, environment and management. Therefore, the experimental data of all subprojects will be combined and analysed together. Moreover, genetic region which belong to the breeding innovations will be described as basis for the development of crop - genomic models.



project leader: Prof. Dr. Hartmut Stützel

projekt assistance: M.Sc. Carolin Lichthardt,  Tsu-Wei Chen