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International Journal of Botany
eISSN: 1811-9719
pISSN: 1811-9700

Editor-in-Chief:  Abdelfattah Badr Mohamed Badr
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Research Article
Impact of Nitrogen, Phosphorous, Potassium and Foliar Feeding on Total Lipids and Fatty Acids of Nigella sativa L. Grown in Arid Zones
Khalid A. Khalid
Background and Objective: Fatty Acids (FA) extracted from Nigella sativa L. have an antimicrobial role. Arid zones in Egypt are characterized by poor nutrients, which negatively affect productivity of medicinal and aromatic plants, so the effect of nitrogen, phosphorous and potassium (NPK) with or without Foliar Feeding (FF) on the Total Lipids (TL) and Fatty Acids (FA) content of N. sativa were examined during two successive seasons. The objective of study was to investigate the effect of NPK and FF on TL and FA content in N. sativa plant. Materials and Methods: Plots were divided into two main groups. The first group was subjected to different levels of NPK combinations: N0P0K0, N1P1K1, N2P2K2 and N3P3K3. N0 = 0 kg N ha–1, N1 = 100 kg N ha–1, N2 = 150 kg N ha–1, N3 = 200 kg N ha–1; P0 = 0 kg P2O5 ha–1, P1 = 37.5 kg P2O5 ha–1, P2 = 56.3 kg P2O5 ha–1, P3 = 75 kg P2O5 ha–1; K0 = 0 kg K2O ha–1, K1 = 37.5 kg K2O ha–1, K2 = 56.3 kg K2O ha–1, K3 = 75 kg K2O ha–1. The second group was subjected to the same NPK treatments but FF was added at 1.5 mL L–1 as FF. Averages of data were statistically analyzed using 2-ways analysis of variance (ANOVA). Significant values determined according to p-values (p<0.05 = significant, p<0.01 = moderate significant and p<0.001 = highly significant). Results: The highest amounts of TL were obtained with N2P2K2 which recorded the values 31.5 and 33.8%; 3.7 and 3.5 g plant–1 of both seasons. Greatest values on main FA constituents {oleic (25.6%), linoleic (47.8%) and linolenic (14.4%)} were obtained from N3P3K3 ×FF. Conclusion: Cultivated N. sativa plants with NPK×FF is very important especially in arid zones for increasing the TL yield and main constituents of FA.

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