In collaboration with Scientific Association of Iranian Medicinal Plants

Document Type : Research Paper

Authors

1 M.Sc. graduated, Branch of Karaj, Islamic Azad University, Karaj, Iran

2 Research Institute of Forests and Rangelands, Agricultural Research Education and extension Organization (AREEO), Tehran, Iran

3 Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

Abstract

In order to study of dry matter yield, essential oil and morphological traits in Nepeta spp., nine accessions belonging to three species including Nepeta racemosa Lam., Nepeta menthoides Boiss. & Buhse and Nepeta cataria L. were evaluated in the Alborz research station, Karaj Iran in 2014. The seeds of accessions were sown in pots in greenhouse and then were transferred to field at vegetative growth stage. The accessions were arranged in a complete randomized block design in three repetitions. Each plot contained 15 spaced plants with 0.5 m intervals. The drip irrigation system was used for irrigation. Data were collected for plant height, flowers per plant, the canopy area, canopy diameter length, fresh and dry matter yield, and essence percentage. To extract the essential oil, the foliage was harvested at flowering stage and dried, milled and the essential oil was extracted using distillation method with water. Data were analyzed of variance and species means were compared based on Duncan method. The results of analysis of variance showed significant difference among the species for all traits except fresh and dry foliage yield. Result indicated that N. cataria was late maturity species and both N. menthoides and N. racemosa were early maturity species. The lowest canopy area was recorded for N. cataria as compared with the two other species. N. cataria had the highest plant height with an average value of 90.1 cm and N. racemosa had the highest flower density with an average value of 15.7 flowers per plant. For N. cataria, the Acc. 15062-Arak was a late maturity species and had higher essential oil yield. Similarly, the Acc. 21132-Bafgh had higher foliage production. In N. menthoides, the Acc. 27795-Meshkinshar had the highest canopy area.

Keywords

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