Economic justification for the use of biological fungicides and plant growth stimulants for growing sunflower

Abstract

The study presents economic substantiation of applying environmentally friendly plant growth stimulators in combination with biological fungicides in sunflower production under conditions of the South of Ukraine. The field research was conducted at Kherson State Agricultural University (Ukraine) in 2017 – 2019 under conditions of dark chestnut alkaline soils with the humus content of 2.5% in the plough layer. The results of the three-year field research prove that the net profit reached the absolute maximum in the variant of the hybrid LG 5580 under conditions of applying the bio-fungicide Fitotsyd-r with the stimulator Ahrostymulin at the stage of budding and amounted to $1081/ha. In this case the cost price was the least – $141.6/ha, and the profitability level was the highest – 196%. In the areas sown with the hybrid Tunca the variant with the combination of Fitotsyd-r and the growth stimulator Ahrostymulin also provided a positive result, but it yielded a little to the combination of the preparations Fitosporyn / Ahrostymulin: the net profit was $579.7/ha, the price cost made $203.4/ha and the profitability was 106 %.On the whole this analysis makes it possible to maintain that additional costs related to purchasing and applying fertlizers are totally compensated owing to the cost of an increase in the yield.

Features of Forming Soil Regimes under Sunflower Cultivation with Different Levels of Biologization in Non-irrigated Conditions of the Southern Steppe of Ukraine

“…A significant inhibiting factor hindering the more intensive implementation of biologization principles in modern agriculture is a certain "psychological barrier" for At the same time, scientists have proven that the application of biologized methods in building the sunflower nutrition system by incorporating microbiological fertilizers into its cultivation technology, which are capable of converting immobilized and hard-to-access forms of macroelements from soil reserves into a highly labile state, chelated complex microfertilizers containing a full range of meso-and microelements together with macroelements and characterized by cumulative action and almost 100% assimilation, allows for a fundamental reconsideration of the principles of building the mineral nutrition system (Sydiakina and Pavlenko 2021; Alzamel et al, 2022). Modern biologized technologies for sunflower cultivation are based on a significant (up to 50-60%) transition of the crop's nutrient system from mineral fertilizers, which are characterized by high levels of inert substances, insufficient absorption by the plant's root system, significant losses of active substances before being absorbed by the soil absorption complex, etc., to biological multifunctional fertilizers (Domaratskiy et al, 2020;Domaratskyi, 2021;Sydiakina and Hamajunova 2023).…”