THE EFFECT OF SOWING DATE AND NITROGEN FERTILIZER FORM ON GROWTH, YIELD AND YIELD COMPONENTS IN SUNFLOWER
Abstract
The purpose of this study was to investigate the effects of sowing date and nitrogen fertilizer forms on the yield
and agronomic characteristics of two cultivars of oil sunflower (early, Sirena and late, Teknosol) in Erzurum,
Eastern Anatolia of Turkey, in 2013 and 2015. Three sowing dates were established at about 10-day intervals
from late-April to early and mid-May (22 April, 2 May and 12 May 2013; and 28 April, 8 May and 18 May
2015). Three nitrogen fertilizer forms ammonium sulfate, ammonium nitrate, and urea were used. The results
of this study showed that sunflower seeding from 28 April to 8 May gives more assurance for higher yields.
The present results highlighted the practical importance of fertilization with appropriate nitrogen fertilizer
forms in seed and oil yield formation in sunflower, and the urea form can be suggested to meet its N
requirements. The yield differences measured for three sowing dates and nitrogen fertilizer forms were
primarily related to the changes in head diameter and 1000 seed weights. According to the results of this
study, early sunflower cultivars, having the highest yield and agronomic characteristics can be recommended
for the similar ecological condition of our study region a short growing season and high altitude.
Keywords
References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Publication Date
May 15, 2017
Submission Date
May 15, 2017
Acceptance Date
May 16, 2017
Published in Issue
Year 2017 Volume: 22 Number: 1
Cited By
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