کنگره بین المللی زیست فناوری گیاهان دارویی و قارچ های کوهی

صفحه اصلی / سومین کنگره بین المللی و چهارمین همایش ملی زیست فناوری گیاهان دارویی و قارچ های کوهی

بررسی روابط صفات زراعی زیره سبز در شرایط آبیاری نرمال و تنش خشکی

نویسندگان :

رقیه امینیان دهکردی¹

1- دانشگاه بین المللی امام خمینی (ره)

کلمات کلیدی :

Essential oil percentage, Correlation, Stepwise regression, Yield.

چکیده :

.In order to investigate the relationship between different agronomic traits of cummin plant, an experiment was done in the form of a randomized complete block design under normal irrigation (irrigation at 100% of field capacity) and drought stress (irrigation at 50% of field capacity) in the greenhouse of Imam Khomeini International University. The studied traits included plant height, number of sub-branches, number of umbrellas per plant, number of umbrellas per umbel, number of seeds per umbel, 1000-seed weight, biological yield, grain yield, harvest index and essential oil percentage. The results of correlation analysis showed that in both normal irrigation and drought stress conditions, grain yield was positively correlated with height, number of branches, number of umbrellas per plant, number of umbrellas per umbel, number of seeds per umbrella, 1000-seed weight, biological yield, harvest index and essential oil percentage. Under normal irrigation conditions, the highest correlation between grain yield (0.95) was observed with the number of sub-branches, number of umbrellas per plant and essential oil percentage. Under drought stress, grain yield had the highest correlation with the number of umbrellas per plant. The highest correlation between essential oil percentage and number of umbrellas per plant (0.98) and number of seeds per umbrella (0.93) was observed under normal irrigation and drought stress conditions, respectively. The results of stepwise regression showed that under normal irrigation conditions the number of branches and 1000-seed weight had the greatest effect on grain yield and justified 96% of the changes, while under stress conditions the number of umbrellas per plant and the percentage of essential oil had the greatest effect on grain yield and explained 95.8% of the changes. Under normal irrigation conditions, the number of umbrellas per plant and under stress conditions, the number of seeds per umbrella had the greatest effect on the percentage of essential oil and explained 95.6% and 85.7% of the changes, respectively.