Table 5
The effects of weed management systems on fatty acid composition of black cumin oil. The values represent the means of 2017 and 2018.
| Weed management | Palmitic acid (C16:0) | Palmitoleic acid (C16:1) | Stearic acid (C18:0) | Oleic acid (C18:1) | Linoleic acid (C18:2) | ɑ–linolenic acid (C18:3) |
| WF | 13.23 a | 0.13 c | 2.63 e | 22.53 e | 52.40 e | 0.07 d |
| WI | 12.99 b | 0.14 b | 2.80 d | 22.61 d | 53.25 c | 0.14 b |
| HCt1 | 12.66 cd | 0.14 b | 2.96 b | 22.62 cd | 53.33 b | 0.21 a |
| HCt2 | 12.65 d | 0.14 b | 2.95 b | 22.63 c | 53.37 a | 0.20 a |
| TCt1 | 12.68 c | 0.14 b | 2.87 c | 24.86 a | 52.53 d | 0.14 b |
| TCt2 | 12.98 b | 0.15 a | 3.28 a | 23.62 b | 52.14 f | 0.09 c |
| Weed management | Eicosenoic acid(C20:1) | Myristicb acid(C14:0) | Pentadecanoic acid(C15:0) | Arachidic acid(C20:0) | Arachidonic acid(C20:4) | |
| WF | 0.270 a | 2.35 a | 3.67 a | 0.12 d | 3.00 b | |
| WI | 0.260 b | 1.60 d | 3.08 b | 0.15 c | 2.96 c | |
| HCt1 | 0.250 c | 1.62 c | 2.99 d | 0.18 a | 3.00 b | |
| HCt2 | 0.190 d | 1.58 e | 3.02 d | 0.17 b | 2.80 d | |
| TCt1 | 0.260 b | 0.68 f | 2.67 c | 0.12 d | 3.05 a | |
| TCt2 | 0.250 c | 1.69 b | 2.66 c | 0.00 e | 3.06 a |
Means within each column of each section followed by the same letter are not significantly different (P < 0.05). Values represent the relative percentage of each fatty acid normalized to the total identified fatty acids (unidentified peaks excluded). WF: weed free plot; WI: weed infest plot; HCt1: H. vulgare living mulch, mowing after black cumin establishment; HCt2: H. vulgare living mulch, mowing before the black cumin flowering stage. TCt1; T. alexandrinum living mulch, mowing after black cumin establishment; TCt2: T. alexandrinum living mulch, mowing before the black cumin flowering stage.
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