بررسی پتانسیل عملکرد و میزان اسانس اکوتیپ‌های زیره سبز در تاریخ‌های متفاوت کاشت در کرمان

In order to study the effects of sowing date on yield and essential oil content of cumin ecotypes, this experiment was performed based on RCBD design in split plot arrangement with three replications on growing season of 2011-2012 in Agriculture Research field of Shahid Bahonar University of Kerman. Sowing dates (26th December, 10th January, 25th January, 9th February and 24th February), and different cumin ecotypes (Semnan, Fars, Yazd, Golestan, Khorasan-Razavi, Khorasan-Shomali, Khorasan-Jonoubi, Esfahan and Kerman) were used as main and sub plots, respectively and grain yield and essential oil content were measured. Interaction effect of sowing date and ecotype were significant on grain yield and under studied ecotypes, showed different responses to sowing dates. Calculated GDD for each ecotype also demonstrated the different thermal requirements of them. Therefore due to the huge variability in cumin germplasm, it is necessary to find the sowing date, for each ecotype, according to the environmental factors and the cultivation aim. The results revealed that based on cultivation aim, for getting the highest seed yield, sowing of Kerman ecotype in February and for getting the highest essential oil yield, Semnan and Kerman ecotypes, considering to superiority than the others can be recommended at Kerman region.