Maize hybrids' productivity depending on the use of biological products and bioorganic fertilizers “Nagro”

The field trials were carried out in 2018-2019 in the laboratory for cultivation technology of row crops of the FSBSI Agricultural Research Center “Donskoy” (Zernograd). The experimental plot was located in the southern agricultural zone of the Rostov region (with insufficient and unstable moisture). The soil of the experimental plot was ordinary heavy loamy blackearth (chernozem) on loess-like loam, with 3.2% of humus, 18.5-20.0 mg of P2O5, 342-360 mg of K2O per kg of soil. The value of the hydrothermal coefficient in the years of research ranged from 0.27 to 0.66, which characterized the insufficient moisture supply of the vegetation period. The purpose of the current work was to study the effect of biological products and bioorganic fertilizer “Nagro” on the productivity of the mid-ripening hybrid ‘Zernogradsky 354 MB'. The applied bio products had a significant effect on the safety of plants for harvesting, which was at the level of 86.6-87.9% and indicators of the yield structure, where there was a significant improvement in comparison with the control variant on 7.2-26.2 g of a cob weight, 6.0-19.75 g of kernel weight per cob, 19.2-32.3 g of 1000-kernel weight. The productivity increase due to the use of bio products ranged in 0.18-0.56 t/ha. The most energetically efficient variants of the trial were the use of the bioorganic fertilizer “Nagro” and the biological product “Flavobacterin”, where the minimum values of the energy intensity of the product were 4.55 GJ/ha (“Nagro”) and the maximum energy efficiency coefficient was 2.39 GJ/ha (“Flavobacterin”). When using the bioorganic fertilizer “Nagro”, there was the largest net income of 20 343 rubles/ha, with the smallest production cost of 3487 rubles/ha and the highest profitability level of 158%.