Primjena spektroradiometrije za vrednovanje biotskih i abiotskih čimbenika stresa u uzgoju ozime pšenice

In 2019, wheat was grown on 141, 602 ha in the Republic of Croatia, making it the second most widely grown crop. The success of cultivation depends not only on the yield, but also on the quality of wheat grains. The specifi c eff ects of climate change can be seen in the variation of grain yields and quality even in growing areas that have traditionally had stable production. In this sense, insuffi cient crop water supply and pest infestations, especially in sensitive phenophases, are the most pronounced threats to production stability. Adapted varieties in terms of drought and pest sensitivity, as well as early detection of stress indicators, are important for wheat production management. Proximal and remote sensing are tools whose potential for early detection of stress indicators is increasingly being exploited in many crops. Proximal sensing using a spectroradiometer in the wavelength range of 350 to 2500 nm is being conducted on experimental crops of fi ve wheat cultivars in the cereal breeding program at two locations in diff erent phenophases. This Summary represents an ongoing study using spectroradiometric methods to detect and evaluate the eff ects of two types of stress in w. wheat crops. Chemometric analysis of spectral response patterns is used to isolate specifi c spectral bands that indicate early signs of stress. The spectroradiometric method will allow the developed spectral vegetation indices to be tested as indicators of the condition of fi ve w. wheat cultivars.