Effect of Sulfur Application Inoculated with Thiobacillus Bacteria on some Physiological Characteristics of Promising Line of L17 Canola (Brassica napus L.) under Rainfed Conditions of Mazandaran

The present research was conducted to investigate the effect of sulfur on physiological traits of promising line of L17 canola at Mazandaran Agricultural and Natural Resources Research and Education Center-Baye Kola Agricultural Research Station on the basis of randomized complete blocks design with three replications in 2018-2019 cropping year. In this research, photosynthetic pigments content, activity pf some antioxidant enzymes, oil content, protein content, oil yield and protein yield were measured. The data results showed that the effect of all sulfur treatments on the investigated traits were significant at one percent probability level. The results of mean comparisons of the investigated traits exhibited that using the amounts of 200 and 300 kilogram per hectare sulfur had the highest effect on the above-mentioned traits. In addition, the correlation test results indicated that oil yield showed the significant and positive correlation coefficients with the traits of protein yield (0.999), peroxidase enzyme activity (0.894), chlorophyll a (0.861), total chlorophyll (0.849), oil content (0.841), chlorophyll b (0.805), superoxide dismutase enzyme activity rate (0.801) and carotenoid (0.759), respectively. Thus, according to the results, it seems that the combination use of sulfur accompanied by inoculation with Thiobacillus bacteria could be considered as a method for improving the qualitative traits of promising line of L17 canola.