ﺑﺮرﺳﻲ ﺗﻐﻴﻴﺮات درﺻﺪ اﺳﺎﻧﺲ دو ﮔﻮﻧﻪ داروﻳﻲ ﻣﺮزه ﺧﻮزﺳﺘﺎﻧﻲ(Satureja khuzistanica Jamzad.) و ﻣﺮزه رﺷﻴﻨﮕﺮی (Satureja rechingeri Jamzad) در ﻣﺮاﺣﻞ ﻣﺨﺘﻠﻒ رﺷﺪی ﮔﻴﺎه در ﻣﻨﻄﻘﻪ ﺷﻤﺎل ﺧﻮزﺳﺘﺎن

To Study the changes of essential Oil content of two medicinal species (Satureja khuzistanica Jamzad and Satureja rechingeri Jamzad) at different growth stages in region of Andimeshk (northern of Khuzestan), an experiment was carry out. At five different times (during vegetative growth) were randomly sampled with three replicates. Plant samples were collected and dried in the shade, the essential oil was extracted using Clevenger apparatus. Analysis of variance was performed in a completely randomized design with software SAS (9.1). For comparison of treatment means, least significant difference (LSD) tests were used. Analysis of variance showed that the effect of harvesting times on essential oil content were significant. Comparison of treatment means showed that the highest essential oil content of Satureja khuzistanica (3/21%) and Satureja rechingeri (5/48%) were obtained during the third harvest (July) and a Fourth harvest (August) respectively. Overall, in both savory species, the highest essential oil content of plants were obtained in pre flowering (vegetative stage) and in the hot months of July and August, Perhaps because it protects plants against damage from water stress, light and high temperature.