Yarı Kurak Koşullarda Farklı Sulama Uygulamalarının Ayçiçeğinin Verim ve Verim Parametreleri Üzerine Etkisi

Abstract

In this study, the effects of irrigation applications on different development stages on yield and yield parameters of sunflower were investigated. The research was carried out in Tekirdag province in Thrace region in 2019. In the experiment, 8 different irrigation treatments were created and irrigation was carried out by drip irrigation method. According to the research results, the most positive results were obtained in all yield and yield parameters from I1 treatment (irrigated in late vegetative stage, flowering stage, grain formation stage). On the other hand, the lowest results were obtained for the I8, which was not irrigated. Especially when the seed yield is evaluated, 520.6 kg da-1 yield was obtained from the I1 treatment, while 319.6 kg da-1 yield was obtained from the I8 treatment. In the non-irrigated I8 treatment, about 40% yield reduction has occurred compared to the I1 subject irrigated at each phenological stage. When the treatments are evaluated in terms of oil content and oil yield, 43.6% oil content, and 226.7 kg da-1 oil yield was obtained from the I1 treatment. The I5 treatment gave the most approximate results to the I1 treatment with 43% oil content and 199.3 kg da-1 oil yield. I8 treatment had the lowest values with 39.1% oil content and 124.9 kg da-1 oil yield. It has been determined that irrigation water use efficiency (IWUE) values are between 1.76 kg m-3 and 4.30 kg m-3 and water use efficiency (WUE) values are between 0.96 kg m-3 and 1.24 kg m-3. As a result of the statistical analysis of the IWUE and WUE results, it was observed that there were differences between the irrigation treatments and I6 treatment came to the fore. Under the condition that the irrigation water is sufficient, I1 treatment can be suggested. Under limited water resource conditions, if two irrigations may be applied, I5 treatment (irrigated during flowering and grain formation stages), if only one irrigation may be applied, I6 treatment (irrigated during flowering stage) can be suggested. For high yield and high oil quality in irrigation programming, water deficiency should be avoided during the flowering stage of sunflower. © Bu çalişma Tekirda? Namik Kemal Üniversitesi tarafindan Creative Commons Lisansi (https://creativecommons.org/licenses/by-nc/4.0/) kapsaminda yayinlanmiştir. Tekirda? 2019.