ECONOMIC EVALUATION OF CORN GROWING TECHNOLOGY MODELS UNDER A BIOLOGIZED NUTRITION SYSTEM

Abstract

Objective. Determination of the economic efficiency of growing corn hybrids under the condition of the combined use of mineral and biological fertilizers in the nutrition system, as well as optimization of plant density in the soil and climatic conditions of the Right-Bank Forest-Steppe on gray forest soils.
Methods. Field studies were conducted during 2021–2023 at the experimental field of the Scientific Research Group "Agronomichne" of the Ukrainian National Academy of Agricultural Sciences, Agronomichne village. The tillage technology was traditional for the Forest-Steppe zone of Ukraine, the area of the registered experimental plot was 46 m², the total area was 62 m². The factorial design of the experiment included a combination of 2:2:5, which amounted to 20 test variants (the total number of plots in four repetitions was 80). The variants were placed systematically, with four repetitions of each.
Results. It was established that in the variants where the hybrid P8834 was studied, the use of Groundfix at a rate of 4 l/ha on the background of N120P60K60 ensured a profitability level of 109 % at a density of 65 thousand/ha and 119% at a density of 70 thousand/ha, and when applying Groundfix at 6 l/ha, 111% and 121%, respectively, which is 7–9% more than in the variants with the application of only mineral fertilizers. In similar variants with the hybrid P9074, these indicators were 99–117.4% and 101–110 %, respectively, which exceeded the control by 9%. Reducing the fertilizer rate to N80P40K40 and applying Groundfix (4 and 6 l/ha) ensured the formation of a higher level of profitability of production. Thus, in the variants where the hybrid P8834 was studied, the most productive from an economic point of view were the variants sown with a density of 70 thousand/ha, with N80P40K40 fertilizer and the application of Groundfix 4 and 6 l/ha, with the profitability level being 129% and 132%. And in the variants with the hybrid P9074 on the background of N80P40K40 and the application of Groundfix 4 l/ha and 6 l/ha, the profitability level was 116 and 119%, respectively.
Conclusions. The most economically advantageous technology was the one that provides for a seeding density of 70 thousand/ha, the application of fertilizers in the norm of N80P40K40, as well as Graunfix 6 l/ha. This approach provides the maximum level of profitability, which is 132 % for the P8834 hybrid and 119 % for the P9074 hybrid.