EFFECT OF SOWING DATE ON SOME AGRONOMIC AND TECHNOLOGICAL TRAITS OF SAFFLOWER (Carthamus tinctorius L.) IN NORTHERN TURKEY

Abstract

This research was conducted to determine the effect of sowing dates on some agronomical and technological traits of safflower cultivars. The research was conducted in Samsun province of Turkey during 2017-2019 growing season with the use of 4 sowing dates (30 October, 14 November, 29 November and 14 December) and two safflower cultivars (Olas and Linas). Plant heights varied between 82.3 -158.7 cm; number of heads per plant between 4.15 -9.47; seed weights per head between 0.84 -1.39 g; thousand seed weights between 34.65 -47.69 g; seed yields per plant between 3.14 -7.67 g; oil contents between 24.64 -29.29% and oil yields per plant between 0.83 -2.25 g. According to sowing date x cultivar interactions, the highest agronomical and technological traits of Olas cultivar were obtained from the 2 nd sowing date and the highest values except for plant height and thousand seed yield of Linas cultivar were obtained from the 2 nd sowing date. It was concluded based on present findings that the second sowing date (14 November) was more suitable for safflower cultivation in winter season in Samsun ecological conditions.

Effect of Sowing Dates on Seed Yield, Yield Traits and Oil Content of Safflower in Northwest Turkey

“…Therefore, seed yield values may have been in the same group at 1 st and 2 nd sowing dates in 2018. Many researchers agreed that the seed yield and some of its components decreases significantly with the delay of sowing dates (Omidi and Sharifmogadas, 2010;Keles and Ozturk, 2012;Eslam, 2018;El Bey et al, 2021). Samanci and Ozkaynak (2003) reported that seed yield decreased with delay in sowing date and seed yields of 1875 (25 April), 1637 (15 May) and 1176 (25 May) kg ha -1 were obtained from the first, second and third sowing date, respectively.…”

“…Among the agronomic factors affecting the crop growth and development, sowing date has an expressing influence and determining the suitable sowing date is one of the most critical factors for high seed yield of safflower. Delays in sowing decreased seriously seed yield potential by shortening the period of vegetative fill and flowering and seed fill into late spring, which often coincides with higher temperatures and the decreasing chance of rainfall (Yau, 2007;Koutroubas et al, 2009;GRDC, 2017;El Bey et al, 2021).…”

“…Nikabadi et al (2008) indicated that 1000 seed weight, number of seeds per head and the seed yield decreased as the sowing date was delayed. El Bey et al (2021) indicated that late sowing could have adverse effects on yield and yield traits of safflower cultivars. Ahadi et al (2011) reported that delay in sowing caused a shortening of the vegetation period and consequently a decrease in seed yield.…”