عنوان مقاله [English]
An experiment was carried out to evaluate the allelopathic potential of various concentrations of (0, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100%) of Atriplex canescens and Atriplex lentiformis which were prepared by aqueous suspension of 10% at the flowering stage on some germination traits (Root length, shoot length, seedling growth, germination percent, speed of germination, vigor index), physiological (total chlorophyll content) and biochemical (total phenols content) shoot let and leaflet of Agropyron elongatum as a non native plant which is introduced on range management projects of the eastern Golestan province in laboratory of Hydro-ecology at Gonbad-e-Kavous University. The experiment was conducted in a completely randomized design with three replications. The ANOVA analysis showed that species, various concentrations and the interaction of species and concentrations had significant difference at 1% on radicle length, speed of germination, seedling vigor index, total chlorophyll and total phenol content from shoot let and leaflet of A. elongatum. The interaction of species and concentrations on germination percent was significant at 5%. While the effect of them on shoot and seedling lengths were insignificant. The mean comparison of interactions effect of species and various concentrations indicated that there were significant decrease on total chlorophyll content and, radicle length, germination percent, speed of germination and seedling vigor index with increasing concentrations of two species of Atriplex as compared to control. On the other hand, the amount of total phenols of seedling had a rising trend with increasing concentrations trend over control. 100% of concentrations aqueous extract of A. canesence had a maximum of Phenols content (194/38%) as compared to control.