Influence of fertilizers on sunflower yield in the Lower Volga region

In the conditions of field experience, on the southern Chernozem, a comparative assessment of the effectiveness of mineral fertilizers and new fertilizer complexes containing natural enriched glauconite for sunflower, the degree of their influence on the yield and quality of oil seeds, as well as on the nutrient and water regime of the soil was carried out. It was found that the application of mineral fertilizers to the spread (N40P40K40) and their mixtures with enriched glauconite (N74P39K39+G30) on the Precocious 87 variety provided an increase in the yield of oilseeds to the control at the level of 0.53-0.43 t / ha. At the same time, it was found that the composition with a higher dose of fertilizers did not exceed the effectiveness of mineral fertilizers. Reducing the dose of fertilizers in the mix twice and adding them to the row during sowing provided a significant increase in the yield of sunflower 0.42 t / ha, with a significant reduction in production costs