Respiratory activity of spring barley when treated with solutions based on phosphorite flour

In a small-plot experiment on gray forest soil, foliar treatment of spring barley of the Raushan variety with a water-phosphorite solution (WPR) and a nanostructured water-phosphorite suspension (NWPS) was carried out at doses of 8 and 16 l/ha. In the process of phenological observations of the development of plants in variants with NVPS top dressing, an earlier (by 3-5 days) onset of the main phases of ontogeny was established. The nanostructured water-phosphorite suspension has a stimulating effect on the respiratory activity of the soil, the level of which increases with different types of plant treatment in the following order: NWPS > WPR > background > control. The positive effect of NWPS was also reflected in the yield of barley. It was in the variant with foliar treatment of plants with NVFS at the rate of 16 l/ha that the maximum yield was noted - 63.7 centners/ha, which is 94.8% higher than the control without fertilizers.