effects of different treatments to stimulate seed germination of salsola arbusculiformis drob

germination is a critical stage in the life cycle of plants and often controls population dynamics, with major practical implications. salsola arbusculiformis is one of the most important plants used to prevent soil erosion and a good fodder resource for sheep and goat in the rangelands of iran. however, the species seems to have low seed germination, so the purpose of this study was to investigate the effects of different treatments to improve its seed germination. three concentrations of gibberellic acid (100, 500 and 1000 ppm), mechanical scarification with sandpaper, concentrated sulphuric acid (h2so4 (98%)), potassium nitrate (kno3 (0.2%)), thiourea one molar, four prechilling periods (10, 20, 30 and 150 days at 2 °c) were used as study treatments and distilled water as control. the results showed that there were significant differences (p