THE EFFECT OF BIOLOGICAL AND CHEMICAL PREPARATIONS ON THE SEEDING QUALITY OF SUNFLOWER SEEDS

Objective. Study the effect of treating seeds of various sunflower hybrids on biological properties using biological preparations both separately and in combination with treaters. Methods. Laboratory according to DSTU 4138:2002. Results. Sunflower seed treatment (hybrids of sunflower seeds NS 7749 and NS 8004) with biological preparations Azotofit®-r, Fitocid-r, Organic-Balance both separately and in combination with a complex of chemical dressers Kariolis + Kruizer contributed to an increase in germination power by an average of 4–12 %, laboratory germination — by 3–9 %. Regardless of the hybrid, seed treatment with biological preparations Organic-Balance and Fitocid-r provided a significant increase in germination power by 10.7–10.9 % and 7.4–8.1 % and laboratory germination by 8.3–8.6 % and 6.1–6.5 %, respectively. Seed treatment with Azotofit®-r had a slight effect on the sowing quality of seeds — an increase in the studied indicators by 3–4 % compared to the control. When treating seeds with a complex that combined chemical treaters with biological preparations, an increase in germination power on average by 4.1–12.3 % and laboratory seed germination by 3.8–9.0 % compared to the control were found. The highest effect on increasing the germination power of the seeds of the studied hybrids by 12.0–12.3 % and laboratory germination by 8.4–9.0 % compared to the control was found when combining the biological preparation Organic-Balance with chemical treaters Kariolis + Kruizer. A positive effect of seed treatment with the studied preparations on increasing the length of the sprout was found, namely: under the action of Organic-Balance — by 25–27 %, Fitocid-r — by 18–20 %, Azotofit®-r — by 11–18 %. In the variants of the experiment with a combination of chemical and biological preparations, the linear dimensions of the sprouts were somewhat smaller compared to the variants where the seeds were treated only with biological preparations, but compared to the control, the sprouts were longer on average by 2.56–3.59 cm, or by 15–21 %. The inhibitory effect of the studied biological preparations on phytopathogenic micromycetes on the seeds was established at the level of 48–67 %, and when combined with chemical treaters Kariolis + Kruizer — up to 90–93 %. Conclusion. A positive effect on seed quality and suppression of phytopathogens of fungal aetiology was established by treating sunflower seeds with biological preparations Organic-Balance and Fitocid-r both separately and in combination with chemical treaters Kariolis + Kruizer.