Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4509910 | Field Crops Research | 2015 | 11 Pages |
Abstract
This study aimed at observing and analyzing spatial and temporal patterns of growth and CO2 and H2O fluxes in winter wheat (Triticum aestivum L.) and winter barley (Hordeum vulgare L.) under heterogeneous soil conditions. Canopy level gas exchange, dry matter, leaf area development and plant available water were measured for this purpose at eight different observation points in three consecutive years (2011-2013) in a 0.72Â ha farmer's field with variable soil conditions. Results show that the dynamics of crop growth and carbon and water fluxes can have a high spatial and inter-annual variability depending on the underlying water supply patterns. Vegetation patterns arise from responses of growth processes and LAI development to drought stress. Flux patterns of CO2 could be linked to soil heterogeneity and leaf area development patterns. This has implications for the choice of scale and model complexity in applying crop growth models at the field level, suggesting a variable selection of scale and model setup depending on the variability of environmental drivers of plant growth and gas exchange.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Agronomy and Crop Science
Authors
Moritz Kupisch, Anja Stadler, Matthias Langensiepen, Frank Ewert,