Pekcan, VeliErdem, Tolga2024-06-112024-06-112005https://tez.yok.gov.tr/UlusalTezMerkezi/TezGoster?key=pPKKNi4sz1aRaVz8gj3jxGMQD0IBOQTwpsEuPd0TL6S-STxEsjXNd-HICykj8elGhttps://hdl.handle.net/20.500.14551/10131Yüksek Lisans-j11 ABSTRACT A Dissertation of Master Thesis THE EFFECTS OF SUPPLEMENTARY IRRIGATION ON SUNFLOWER WATER USE AND YIELD IN EDİRNE CONDITIONS VeliPEKCAN Trakya University Institute of Natural Sciences Department of Agricultural Structure and Irrigation Supervisor : Associated Professor Dr. Tolga ERDEM 2005, Page : 80 Research Committee: Assoc. Prof. Dr. Selçuk ALBUT Assistant. Prof. Dr. Tolga ERDEM. Assistant. Prof. Dr. Hüseyin îlker ÇELEN The research was conducted to determine the application time of the plant growing stage as the most sensitive period of sunflower to water need applying with the plot irrigation method and to compare the sunflower seed yield and other yield parameters under dry conditions and a single irrigation (supplementary irrigation) conditions using TR-3080 and TR-6149 sunflower hybrids registered by Trakya Agricultural Research Institute. Based on the research, the water use on the growing season of sunflower plant were obtained in TR-3080 as 297 mm and in TR-6149 as 314 mm, these consumptions were increased to 428 mm in TR-3080 and 441 mm in TR-6149 on a single irrigation. These increases on the water uses of sunflower plant affected definitely over seed yield and the plant vegetative growth. The application time on the beginning stage of flowering in the sunflower had higher effect than other application times on the Water sensitivity of the plant. The seed yield increases were measured as 38% in TR-3080 and as 32% more in TR-6149 sunflower hybrid comparing with under dry condition results. KEY WORDS : Sunflower (Helianthns annum L.), supplementary irrigation, evapotranspiration, seed yield.trinfo:eu-repo/semantics/openAccessZiraatAgricultureMaster Thesis191168155