Effects of Nitrogen and Sulfur Fertilization on Yield and Quality in Sunflower (Helianthus annuus L.)
2020
ERBAS, Sabri | SENATES, Ali
This study was carried out to determine the effects of nitrogen (0, 5, 10, 15 kg N/da) and sulfur (0, 5, 10, 15 kg S/da) applications on yield and quality characteristics of sunflower in Isparta University of Applied Sciences, Faculty of Agriculture, Department of Field Crops in 2014 and 2015 years. The experiment design was in split plots of randomized complete blocks (Nitrogen doses were placed in the main plots) with three replications. The differences of all features between years in the study; differences between N doses of other properties except hull and oil content; differences between S doses of other properties except fat ratio were found to be significant at 1% level. According to our results, seed yield varied between 235.4-348.6 kg/da (N0S0-N5S5) in 2014 and 174.4-327.4 kg/da (N0S0-N10S5) in 2015. Seed yield, which was 231.9 kg/da in control plots, increased by 31.3% up to 10 kg/da and reached 304.4 kg / da according to the average of N dosage. According to the average of S dosage, the highest seed yield was obtained from 5 kg/da (302.8 kg/da) and the lowest control plots (248.4 kg/da). The oil content increased by 2.1% and 5.0%, respectively, in the application of high N and S doses compared to the control. As a result; in Isparta conditions, it can be recommended to use 10 kg N/da nitrogen and 5 kg S/da sulfur in order to obtain higher yield and quality in oilseed sunflower cultivation.
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