مطالعه بررسی گونه های Helichrysum􀀃globiferum و Helichrysum aucheri بر احیای اراضی شور حوزه های آبخیز

In rangeland watersheds, drought and salinity are the two preventive factors for production. So one of
the obstacles to the development of plants that is salinity and drought during seed germination. in this
study we evaluated the effects of salinity stress on Helichrysum globiferom and Helichrysum aucheri
germination properties based on a In the form of a factorial experimental design with four replications
and four salinity levels (0-50-100-150 mM sodium chloride) in seed Ecology laboratory of Sari Natural
Resource Faculty. Seeds of two species were collected of Qushchy pastures in 70 kilometers of the old road
of Urmia-Karabakh. Results showed that salinity stress had a significant reducer effect on percentage and
speed of germination, growth of root and shoot length in two Species. Amount of reduction in the total in
all traits species of Helichrysum globiferom species of Helichrysum aucheri. The amount of this reduction
in all traits in Helichrysum globiferom was less than Helichrysum aucheri species. The ratio of Root to
shoot length (allometric coefficient) also was the highest in Helichrysum globiferom. So we conclude that
this species is more resistant than other species. So the highest decrease in both species was observed in
germination percentage, germination speed, and root, shoot and plant length, in treatment 150 mM.