Seed Science Society of Iran Iranian Journal of Seed Science and Technology 2322-2646 14 1 2025 03 21 Investigating the effect of different amounts of sulfur and zinc on the seed yield of hybrid Monogerm sugar beet (Shirin cultivar) Investigating the effect of different amounts of sulfur and zinc on the seed yield of hybrid Monogerm sugar beet (Shirin cultivar) 107 126 133504 10.22092/ijsst.2024.365398.1520 FA Saeed Sadeghzadeh Hemayati Associate Professor, Institute of Sugar Beet Research and Seed Production, Agricultural Research, Education and Promotion Organization, Karaj, Iran. Vodod Saidnia Researcher, Alarough Agricultural and Natural Resources Research Station (Ardebil), Agricultural Research and Natural Resources Center of Ardebil Province (Moghan), Ardebil, Iran. Ghasem Parmoon Assistant Professor, Sugar Beet Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, Education and Extension Organization (AREEO), Kermanshah, Iran. Journal Article 2024 04 07 This study was conducted to investigate the role of application of sulfur and zinc on commercial seed yield of sugar beet Monogerm cultivar in a factorial experiment based on randomized complete block design with three replications. The experimental treatments included sulfur (0, 200, and 400 kg/ha) and zinc (0, 20, and 40 kg/ha). The results showed that the seed yield and commercial seed yield, as well as the interaction effect of sulfur and zinc, has a significant impact on seed yield alone. With the application of 400 kg/ha sulfur, the raw seed yield increased by 17% and the commercial seed yield increased by 54%. The highest raw seed yield (3443 kg/ha) was obtained with the application of 400 kg/ha of sulfur and 40 kg/ha of zinc. The simultaneous application of sulfur and zinc led to an increase in the proportion of oversized seeds and standard seeds, and a decrease in the proportion of undersized seeds. The highest percentage of oversized seeds was obtained with the application of 400 kg/ha of sulfur and 20 kg/ha of zinc, The application of 400 kg/ha of sulfur resulted in a 12% and 6% increase in mechanical and p sulfur improved both the quantitative and qualitative aspects of sugar beet seed production, while zinc did not have much influence and only increased the quantity of seed produced. Under the conditions of this study, the combination of 400 kg/ha of sulfur and 40 kg/ha of zinc was recommended. This study was conducted to investigate the role of application of sulfur and zinc on commercial seed yield of sugar beet Monogerm cultivar in a factorial experiment based on randomized complete block design with three replications. The experimental treatments included sulfur (0, 200, and 400 kg/ha) and zinc (0, 20, and 40 kg/ha). The results showed that the seed yield and commercial seed yield, as well as the interaction effect of sulfur and zinc, has a significant impact on seed yield alone. With the application of 400 kg/ha sulfur, the raw seed yield increased by 17% and the commercial seed yield increased by 54%. The highest raw seed yield (3443 kg/ha) was obtained with the application of 400 kg/ha of sulfur and 40 kg/ha of zinc. The simultaneous application of sulfur and zinc led to an increase in the proportion of oversized seeds and standard seeds, and a decrease in the proportion of undersized seeds. The highest percentage of oversized seeds was obtained with the application of 400 kg/ha of sulfur and 20 kg/ha of zinc, The application of 400 kg/ha of sulfur resulted in a 12% and 6% increase in mechanical and p sulfur improved both the quantitative and qualitative aspects of sugar beet seed production, while zinc did not have much influence and only increased the quantity of seed produced. Under the conditions of this study, the combination of 400 kg/ha of sulfur and 40 kg/ha of zinc was recommended. https://ijsst.areeo.ac.ir/article_133504_3cb6a54807baaf215a535bdb238c2425.pdf