ECONOMIC EFFICIENCY OF FERTILIZERS APPLICATION IN THE SECOND CULTIVATION OF MAIZE

Abstract

Economic and agronomic efficiency of the application of mineral fertilizers and straw in the second planting of maize was studied on cohesive sandy-loam soil with the increased content of phosphorus and potassium in 2018-2020. It is established that when 60 t/ha of cattle stable manure is applied during the first year, a high yield and the lowest cost of 1 t of grain or feed units is provided by the variant of harvesting maize for grain, followed by a straw plowdown and applying 30 kg/ha of nitrogen, and 45 kg/ha of potassium during pre-sowing cultivation during the following year, and applying 60 kg/ha of nitrogen in the form of urea at the 6-7 leaves stage. Against the background without maize straw, when the crop is harvested for silage, this variant is also the best, but the net income in this case is lower by 70.5-89.9 rubles/ha.