Water stress effect on confectionery hybrid sunflower (helianthus annuus L.) Cultivars in different growth periods

Abstract

Drought is one of the factors that cause serious yield losses in agricultural production. Severe drought events from global warming seriously affect plants and cause yield losses. Confectionary sun-flower is involved in the production as a very imÂportant plant for in Turkey. However, the drought stress that may occur periodically causes this product to lose efficiency. In this study, water stress was apÂplied in different development periods (head formation, flowering, seed-filling periods) of two hy-brid confectionery sunflowers. The trial was conducted as split-plot design based on 3 replications between 2018-2019 years. According to the results obtained, many characteristics were affected by waÂter stress during the flowering period. Particularly, seed yield, head diameter, 1000 seed weight, seed length, and hull ratio characteristics show significant differences. To seed filling period, water stress adversely affected the oil content. However, the water stress in the head formation period weren't affect the plant properties compared to the control parcel. As a result; seed yield, seed length, and oil ratio characteristics, flowering, and seed-filling period were deÂtermined as an important step for confectionery hyÂbrid sunflower. © by PSP.