اثر تيمارهاي مختلف در شكستن خواب و تحريك جوانه زني بذور يونجه زرد

Effects of different treatments on dormancy and germination of Melilotus officinalis L. Seeds

Melilotus officinalis L. has dormant seeds at maturity. Seed dormancy is an obstacle in controlling of this weed. The present work trys to find out the effecfive methods of bresking M. officinalis ʹs seed dormancy. This study examines the effects of different compounds such as concentrated sulfuric acid (98%) in various time intervals, scarification, holing by scalpel, grinding the seeds by marblestone, wetting by boiled water in different time intervals, stratification, stratification plus concentrated sulfuric acid, and pretreatment by sodium azide, ethylene, hydrogen peroxide, potassium nitrate and gibbet-Ric acid for breaking M.officinalis ʹs seed dormancy. The treatments of concentrated sulfuric acid in 30 minutes, stratification plus concentrated sulfuric acid in 15, 20 and 30 minutes, holing by scalpel were the most effective treatments and caused the highest germination up to 100 percent. Other treatments in breaking seed dormancy and increasing germination did not have any meaning full effect.