Influence of a complex of agrotechnical methods on yield qualities of F<sub>1</sub> seeds of the hybrid Fakel in progeny (report II)
The researches were conducted on fields of a farm “Berezanskoe”, Korenovsk district, Krasnodar region. Size of a plot is equal to 112 м<sup>2</sup>, in three replications. The object of the research was F<sub>1</sub> seeds of interlinear sunflower hybrid Fakel produced in 2020 with different positive modifications on a hybridization plot. The seed were planted in 2021 to estimate impact of the positive modifications (methods) on yield and quality seeds of the hybrid Fakel in progeny. Two sowing rates (60 and 80 thousand per a hа) were used to realize fully a yield potential of the hybrid. A certain positive impact was fixed in variants with application of biological protection measures and microbiological fertilizers during plants vegetative period. Yield increase was 0.02 t per ha. Increase of oil content and oil yield of the hybrids Fakel in progeny under different positive modifications was insignificant: 0.2-0.3% and 0.01-0.02 t per ha, respectively. Application of biological protection measures and microbiological fertilizer during the vegetative period of plants on the hybridization in 2020 contributed in a profitability increase by 6% when sowing F<sub>1</sub> seed in 2021 with sowing rate of 80 thousand seed per ha.