تاثیر تنش آرسنیک و تیمار اسید هیومیک بر جوانه زنی و رشد گیاه پنیر باد ((Withania coagulans

Withania coagulans has several medicinal properties, including anti- tumor and Strengthen of stomach. Arsenic in small amount has a toxic effect on the soil and reduce or prevent the growth of plants. This research was conducted as factorial based on completely randomized design . The present work consists of four levels of arsenic in treated 0 ( control), 5 , 10 and 15 mg per liter and humic acid were 14 % at 2 Levels 0 and 150 ppm . Shoot and root length , chlorophyll content, fresh weight , dry weight , percentage and rate of germination were determined . Results showed a 99% decrease in all measured characteristic and humic acid by 99% probability increases germination rate and 95% increase in the amount length of the root . this study showed that the humic acid have properties bonding of heavy metals in the soil and prevent absorption of it by plants.