The effect of plant frequency on yield and yield components of sunflower (Helianthus annuus L.) varieties in different maturization group in dry conditions in Çukurova

This experiment was carried out during the sunflower growing season of 2019 in the private agricultural area of Dutluca District of Sarıçam district of Adana Province, effects of three different sunflower varieties and five different sowing frequencies on yield and important agricultural characteristics were tried to be determined. In the research, Lg 50.585, Duet Cl and Sanbro Mr varieties were used as materials. The distance between planting rows was kept as 70 cm in all applications. 5 different row distances are 15 cm, 20 cm, 25 cm, 30 cm and 35 cm. In the research, the output time, flowering time, ripening time, plant height, table diameter, seed holding rate, seed internal rate, protein rate, hectolitre weight, seed yield, oil yield, oil content and moisture content of the seeds in the harvest were evaluated. According to the research results, different row spacings applied in planting had significant effects on table diameter, seed holding ratio, protein ratio, hectoliter weight, seed yield and oil yield. Seed yields of varieties ranged from 465 kg / da to 344,6 kg / da. The highest yields were reached at a distance of 15 cm. The frequency of this plant was followed by 20 row application. Key Words: Sunflower, seed yield, oil content, plant density