Effect of Sulfur Fertilizer and Some Biostimulants on Antioxidant Activity of Canola seeds

Abstract A field experiment was carried out during the winter season (2022/2023) in the fields of the Al-Nouriyah Forest Division of the Ministry of Agriculture in Al-Diwaniyah province. The objective was to examine the impact of three different levels of sulfur fertilizer (0, 40, and 60 kg S ha -1 ) and certain biostimulants (excluding stimulant, biofertilizer, humic acid, and ascorbic acid) on Canola seed growth, yield, and oxidative activity. The experimental design employed a factorial arrangement with a completely randomized block design and three replicates to distribute treatment combinations among the factors. The means of the combinations were compared using the least significant difference test, with a significance level of 0.05. The results demonstrated that sulfur addition at a rate of 60 kg S ha -1 produced the highest averages for the majority of the measured characteristics. The results of the study were also significantly impacted by the application of biostimulants, including humic acid sprinkling at a 2 g concentration. With the highest average values for leaf pigment content and plant height, L -1 significantly outperformed the competition. The ascorbic acid spray treatment at a concentration of 200 mg L -1 yielded the highest average values for the remaining qualitative and medicinal characteristics that were investigated, with the exception of total chlorophyll and the weight of 200 seeds. The significant impact was also observed in the interaction among the study factors. The experimental condition involving a concentration of 60 kg S ha -1 Humic resulted in the highest weight of 200 seeds, as determined by plant height, total chlorophyll content in foliage, and biological yield.