THE EFFECT OF GLUTAMIC ACID SPRAYING ON GROWTH AND YIELD OF SUNFLOWER (Helianthus annuus L.) VARIETIES

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Erciyes Üniversitesi, Fen Bilimleri Enstitüsü, --, Türkiye

Tezin Onay Tarihi: 2022

Tezin Dili: İngilizce

Öğrenci: RIYADH TAHA DWAYYEH DWAYYEH

Asıl Danışman (Eş Danışmanlı Tezler İçin): Ali İrfan İlbaş

Eş Danışman: Muaiad Hadi Al-Ani Al-Ani

Özet:

ABSTRACT The present thesis was conducted to determine the effects of glutamic acid treatments at different doses on yield and growth parameters of some sunflower varieties. Glutamic acid treatments were practiced as foliar sprays at four different concentrations (0, 100, 200 and 300 mg l-1 ) to three different sunflower varieties (Sakha, Amar and Ishaqi 1). Field experiments were conducted in randomized blocks split-plots experimental design with three replications under Anbar-Iraq conditions in 2021. Sunflower varieties were placed into the main plots and glutamic acid concentrations were placed into the subplots. The highest average stem height was measured as 194.25 cm, leaf area as 10188.70 cm2 , leaf area index as 5.82 cm 2 , number of leaves per plant as 23.93 leaf plant-1 , plant dry weight as 181.22 g, seed weight as 49.17 g plant-1 , seed yield as 4.87 t ha-1 and biological yield as 17.98 t ha-1 . The 100 mg l-1 glutamic acid treatments of the variety Aqmar yielded the highest chlorophyll content (40.51%) and head diameter (17.525 cm). The 100 mg l-1 glutamic acid treatments of the variety Ishaqi 1 were superior in number of seeds per head (850 seed plant-1 ) and protein content (15.51%). The 100 mg l-1 glutamic acid treatments of the variety Sakha were superior in 1000-seed weight (66.50 g) and harvest index (33.58 t ha-1 ). The 200 mg l-1 glutamic acid treatments of the variety Ishaqi 1 were superior in percentage of empty seeds (75.29%) and oil content (44.09%). In general, the highest vegetative growth (stem height) (194.25 cm) and the highest seed yield (4.87 t ha-1 ) were obtained from 300 mg l -1 glutamic acid treatments of the variety Aqmar. Key Words: Sunflower, Amino Acids, Glutamic Acid, Vegetative Growth, Yield.