بررسی تاثیر تنش شوری بر خصوصیات جوانه‌زنی و رشد اولیه گیاهچه برخی علف‌های‌ هرز

In order to study the effect of salinity stress on germination characteristics and seedling growth of Lambsquarter (Chenopodium album L.), Kochia (Kochia scoparia L.), Wild barley (Hordeum spontaneum L.) and Barnyard grass (Echinochloa crus-galli L.) species, the experiment was conducted in germination stage as a factorial experimental based on completely randomized design with four replications. Salinity levels applied were 0, 100, 200, 300, 400 and 500 mmol/L. Traits of percentage of germination, rate of germination, plumule length, radicle length, seedling length, seedling dry weight, and seedling vigor index was measured. Analysis of variance showed that for all the traits studied, there is a very significant difference between weeds. Also, the effect of different levels of salinity on the traits was very significant. The results showed that with increasing salinity level, all measured traits were reduced in all species, but the decline in the studied species was different. With increasing salinity level, Kochia and Wild barley were minimum and maximum reduction in germination and seedling growth factors, respectively. At 500 mmol/L salinity, none of weeds germination has stopped.