The influence of foliar treatment with fertilizers based on humic acids on the yield and quality of irrigated potatoes in Saratov Zavolzhye

There was studied the effect of humic fertilizers on the yield and quality of potatoes on irrigated dark chestnut soils of Saratov Zavolzhye in 2018-2020. The object of research was the Rosara variety released in the Volga region. For foliar treatments there were used the products manufactured by Life Force Group LLC. It has been established that, on average, three-fold foliar treatment of potatoes with Reasil Micro Hydro Mix over three years increased the yield of marketable tubers by 1.90 t/ha, Reasil Amino Copper  by 4.02 t/ha. The maximum increase in yields was obtained on the options of the mix use of Reasil Micro Hydro Mix with Reasil Carb N Humic (6.49 t/ha) and Reasil Amino Cu with Reasil Carb N Humic (5.57 t/ha). With the application of fertilizers, the share of marketable tubers in the total yield increased significantly (compared to the control). In the tubers of plants enriched with fertilizers, an increase in the content of starch (by 3-5% compared to the control) and vitamin C (by 5-9% higher than the control) was noted.