Effect of three varieties of basil and the nitrogen source in essential oil contents

الملخص EN

The study was conducted during the 2018 growing season in a field belong to Horticulture and Forestry Division/ Iraqi Ministry of Agriculture / Al-Najaf Agricultural Directorate.

Three varieties of basil were tested as the first factor including Ocimum basilicum var.

basilicum (sweet basil), O.

basilicum var.

purple (red basil) and O.

basilicum var.

citriodorum.

(lemon basil).

The second factor was the effect of three sources of nitrogen fertilizers including chemical using Urea at the level of 400 mg.

L-1, Organic fertilizer using a liquid organic nitrogen at 4 ml.

L-1 and Bio- fertilizer using Azotobacter chroococcum at 5 gm.

bacteria.

m-2 was applied to the soil while the control treatment was the spraying with distilled water.

Randomized Complete Block Design (R.

C.

B.

D.

) was used as a factorial experiment in a split-plot system with three replicates for each treatment.

The L.

S.

D.

test was adopted to compare mean with a probability of 0.

05 level (P <0.

05).

The Results showed superiority of red basil cultivar increased the active constituents content of Linalool to 64.

96 mg.

gm-1 Myercene to 29.

87 mg.

gm-1.

While the Nitrogen source with Bio-fertlizer was superior increased Camphor, Linalool, Limoine and Myercene to 7.

82, 77.

92, 18.

45and 35.

86 mg.

gm-1 respectively, compared with control treatment