Abstract
The present study was conducted to investigate the effects of phosphorus fertilizer treatments (0, 30, 60, 90 and 120 kg ha−1 P2O5) on crude oil, diosgenin, and trigonelline contents and on fatty acid composition of fenugreek plants. Experiments were conducted in a randomized block design with four replications. Results revealed under different phosphorus fertilizer doses that crude oil content varied between 4.75 and 5.54%, diosgenin content varied between 0.43 and 0.52% and trigonelline content varied between 0.74 and 0.97%. The highest diosgenin and trigonelline contents were obtained under the 30 kg ha−1 P2O5 treatment and the highest crude oil content was observed under the 60 kg ha−1 P2O5 treatment. With regard to fatty acid composition, C18:2, C18:3, C16:0, C18:0, C18:1 and C20:0 were identified as the major components and C14:0, C16:1, C17:0, C17:1, C20:1 and C22:0 were identified as the minor ones. Linoleic acid (C18:2) content varied between 42.78 and 43.44% and linolenic acid (C18:3) content varied between 26.77 and 29.21%. Except for linolenic acid (C18:3), the highest contents of all the other major components were observed with the 90 kg ha−1 P2O5 treatment.
Published Version
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