مطالعه اثر سیلیکون در بهبود تحمل به شوری ژنوتیپ های مختلف سورگوم دانه ای

Today soil salinity is one of the most important abiotic stresses that as a major problem in arid and semiarid regions is discussed(kingsbury and epstein,1986). Hence, in order to investigate the effect of silicon on salt tolerance improvement in grain sorghum, a split split plot experiment was conducted based on randomized complete block design with three replications at agriculture faculty of Bahonar University at Kerman during 2013-2014 growing season. Main plots were two salinity levels (0 and 10 dSm-1) and subplots ,
included two Silicon levels (0 and 6 mM), and sub-sub plots were four genotypes (Sepideh cultivar and TN-04-95, TN-04-70, TN-04-71 lines). Results showed that silicon application significantly increased 1000-grain weight under salt stress conditions. Silicon significantly produced maximum grain yield and maximum harvest index for Sepideh cultivar under salinity stress. According to the results it can be said that either under normal condition or salinity stress silicon is approximately able to reduce negative effects of salinity on yield and it's components.