اثر پیش تیمار اسید هیومیک بر شاخص‌های جوانه‌زنی و رشد گیاهچه همیشه بهار (Calendula officinalis) در شرایط تنش شوری

Lack of favorable plant germination and establishment is one of the problems of farmers in saline areas. As a strategy seed priming for increased plant establishment, especially in adverse conditions is raised. To evaluate effect of humic acid of Pretreatment on induction of salinity stress tolerance in plants Calendula. The experiment was arranged as factorial design in a randomized block design with three replications. Factors were included humic acid at five concentrations (0, 150, 300, 450, 600 mg/lit) and NaCl at five concentrations (0, 50, 100, 150, 200 mM). Both of separated and interaction effects were significant on germination percentage, germination rate, length of radicle and hypocotyle. Humic acid had a positive effect on germination and encouraged it under stress treatment. The levels of humic acid, pretreated with 300 mg/lit in the high stress levels than other treatments in most of the studied superiority. The results showed that pretreatment by humic acid on salt stress talented areas can cause resistance of Calendula in the seed germination and seedling establishment.