Effect of Elemental Sulfur and Thiobacillus Bacteria on Yield and Some Quality Characteristics of Canola

Low availability of some nutrients is one of the major factors for the widespread occurrence of plant nutrient deficiency in calcareous soils. Therefore, any strategy for solution of this problem is important. For this purpose, an experiment was carried out in four sites (Chogha Narges, Mahidasht, Najaf Abad and Ghomsheh in Kermanshah Province), with different contents of available sulfate, using complete randomized blocks design with three replications, in 2018-19. The amounts of sulfur paired with Thiobacillius bacterium inoculants included no sulfur (S0), 250 kg sulfur/ha along with 5 kg/ha Thiobacillus bacterium inoculant (S1), 500 kg sulfur/ha with 10 kg Thiobacillus/ha (S2), and 1000 kg sulfur/ha with 20 kg Thiobacillus/ha (S3). The combined analysis results showed that the effect of sulfur, location, and their interaction on grain yield, 1000- grain weight, oil percent, and nutrients concentration in rapeseed grain in Chogha Narges, Mahidasht, Najaf Abad, and Ghomsheh were significant at 1% (p<1%). The highest grain yield, 1000- weight, oil percent and nutrients concentration was obtained in S3 treatment, which increased wheat yield by 647, 756, 474, and 406 kg.ha-1 in Chogha Narges, Mahidasht, Najaf Abad, and Ghomsheh, respectively, compared to the control treatment. Oil percent increment at the mentioned regions were 2.1%, 1.4%, 1.2%, and 0.5%, respectively.