Abstract

In order to study the domestic wastewater influence on secondary metabolite in thyme (Thymus vulgaris L.) under field condition, this experiment was carried out in Iran. In the field, 15 lysimeters having thyme (T. vulgaris L.) were used, where 1 to 5 lysimeters wereirrigated by domestic wastewater and primary drainage water was accumulated. 6 to 9 lysimeters were irrigated by primary drainage water and then, were accumulated by secondary drainage water and we have irrigation 10, 11 and 12 lysimeters by secondary drainage water. In order to compare plants characteristics, in 13, 14 and 15 lysimeters were irrigated by agronomical water. The secondary metabolite in thyme 3.4% increased under irrigation by secondary drainage water into irrigation by agronomical water. The findings may give applicable advice to medicinal and aromatic plants researchers for management and concern on water strategy and estimate of irrigation carefully for increase of quantity and quality yields in medicinal and aromatic plants farming.

Key words: Domestic wastewater, essential oil yield, Thymus vulgaris.