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Effect of Seeding Rate and the Spraying with Licorice Extract in Oil Percentage and Active Ingredients of Caraway (Carum Carvi L.)

Hassan Ahmed Yassin

Journal of Ecological Engineering

2023

Vol. 24, nr 4

140--150

A field experiment was conducted to study the effect of three levels of seeding rate (4.7 and 10 kg•h-1) and three concentrations of licorice extract (0.3 and 6 g•L-1) the data were analyzed statistically by using a factorial experiment according to the randomized complete block design (RCBD) with three replicates. The results showed that the seeding rate 7 kg•h-1 gave a significant increase in seeds yield, volatile oil yield, and limonene ratio, which were 1162.6 kg•h-1, 25.6 kg•h-1, and 30.41%, respectively. In turn, seeding rate 4 kg•h-1 gave a higher average of the volatile oil percent and carvone percent, which were 2.3 % and 67.27%, respectively. The results also revealed that spraying of licorice extract with 3 g•L-1 gave significantly influenced in seeds yield and volatile oil yield which were (1016.6 and 23.3 kg•h-1) respectively, whereas the spraying of licorice extract with 6 g•L-1 gave the highest ratio of carvone and limonene which were 29.71% and 67.54% respectively. The interaction between the seeding rate of 7 kg•h-1 and licorice extract with 3 g•L-1 had a significant effect on seeds yield and volatile oil yield, which amounted to (1234.2 and 28.4 kg•h-1), respectively.