Changes in N, K, and Fatty Acid Composition of Black Cumin Seeds Affected by Nitrogen Doses under Supplemental Potassium Application


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AYTAÇ Z., GÜLMEZOĞLU N., Saglam T., KULAN E. G. , SELENGİL U., HOŞGÜN H. L.

JOURNAL OF CHEMISTRY, vol.2017, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2017
  • Publication Date: 2017
  • Doi Number: 10.1155/2017/3162062
  • Journal Name: JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

This study was carried out to determine the efficiency of nitrogen (N) doses (0, 30, 60, and 90 kg N ha(-1)) under supplemental potassium (K) application (50 kg K-2 O ha(-1)) on black cumin in 2011 and 2012. The results showed that increased N levels resulted in increasing seed yield and N and K contents in seed, while oil content decreased. The seed yield and oil yield were peaked at the doses of 60 kg N ha(-1) and 50 kg K ha(-1). An increase in N doses caused a reduction in oil content regardless of K supply. Saturated fatty acids and oleic acid were slightly increased by K application, while minor changes in linoleic acid were detected. It was concluded that 60 kg N ha(-1) with supplemental K application should be advised for enhancement in seed yield, oil yield, and N and K contents in seeds of black cumin without significant changes in fatty acid composition.