The effects of different nitrogen and phosphorus doses on yield and yield components of safflower (Carthamus tinctorius l.). in dry conditions

This study was conducted to determine the effect of different nitrogen and phosphorus doses on yield and yield parameters of safflower in the experimental area of Ahi Evran University in 2016. Experiment design was in a split plots of randomized complete blocks with three replications and Balcı variety was used as seed material. The treatments consisted of four nitrogen doses 0, 4, 8, 12 kg N/da as the main plots and four phosphorus doses (0, 4, 8, 12 kg P/da) as the subplots. According to the results, nitrogen and phosphorus doses change has positive effects on day of rosette stage, flowering date, day of maturity, plant height, number of side branches, number of table, weight per thousand seeds, seed yield and crude oil yield. It was determined that, plant height, number of branches, head number, head diameter, 1000 seed weight, hull-kernell ratio, yield, protein ratio, crude oil rate and oil yield ranged from 47.49 -56.20 cm, 2.19-3.90, 3.30-5.00, 18.69-22.96 mm, 31,89-37,93 g, 54.83%-60.30%, 82.17-182.23 kg/da, 17.74% -20.17%, 33.06%-39.06% and 31.33 – 67.98 kg/da. The highest yield was determined as 182,23 kg/da from 12kg N/da+12 kg P/da fertilizer doses.