Growth stimulators and mineral fertilizers influence on Sudan grass growth, development and productivity

Abstract

The article considers the results of research on the influence of seeding rates, fertilizers and growth stimulator on the development and productivity of the Sudan grass of the Julia variety in the conditions of chestnut soils of the Volgograd region. In the field two-factor experiment, we studied: factor A - the three seeding rates 1.0, 1.5 and 2.0 million germinating seeds per hectare; factor B - fertilizers and growth promoters: 1. Control without fertilizers; 2. N₆₀ P₆₀ K₄₅ + N₃₀; 3. Growth stimulator Raikat Start; 4. N₆₀ P₆₀ K₄₅ + Raikat Start + N₃₀. The use of mineral fertilizers increased the leaf surface area by 0.3-0.5 thousand m²/ha, the use of growth stimulators increased the leaf surface area by 0.1-0.2 thousand m²/ha, the combined use of mineral fertilizers and growth stimulators increased the leaf surface area by 0.9-1.2 thousand m²/ha. It was found that the highest yield of green mass of Sudan grass, 28.6 t/ha, was formed on the variant with a seeding norm of 1.5 million tons of germinating seeds per ha with the complex application of mineral fertilizers and the growth stimulator Raikat Start.