The effect of using nanosilver-containing microelement fertiliser on the physiological properties of Avena sativa L.

Since the Green Revolution, higher crop production has caused a significant decrease in available soil elements. Microelement deficiencies have become a factor that limits the productivity of agricultural crops around the world. Recent advances in bionanotechnology have opened the way to the development of biocompatible foliar nanofertilisers with higher nutrient utilization efficiency. It was assumed that the applied foliar fertilisation would have a positive effect on the growth and development of plants. The application of fertiliser positively affected the parameters analysed of plant gas exchange (net photosynthesis rate (PN), transpiration rate (E), stomatal conductance (gs), intercellular conductance (Ci)) and chlorophyll content and its fluorescence (relative chlorophyll content (CCI), maximum quantum efficiency of photosystem (Fv/Fm), maximum quantum efficiency of primary photochemistry (Fv/F0), photosynthetic efficiency index (PI), total number of active absorption reaction centers (RC/ABS)). Compared to the control, in most analyses, the most stimulating effect was observed for fertiliser concentrations of 0.25 to 0.30% (except Ci – 0.35%). However, the effectiveness of the applied doses depended on the measurement date. To clearly determine the dose that will have the most stimulating effect on the analysed parameters and at the same time will not be toxic to plants, more research should be conducted, especially under field conditions.