Abstract

This study was aimed to investigate the effect of seed soaking and spraying with selenium treatments on reducing the effect of heat stress at the pollination and fertilization stage of maize planted in the spring season in Iraq. Field experiment was conducted in the experimental farm, Agricultural Engineering Sciences, University of Baghdad-Iraq, during the season 2021. The experiment was laid out in Randomized Complete Blocks Design within split plot arrangement with three replicates. Main plots included two cultivars of maize (Baghdad 3 and cultivar 5018), while the sub plots included four levels of selenium: (soaking seed with selenium at concentrations 2 and 5 mgL-1 and spraying plants with selenium at concentrations 10 and 20 mg L-1 in addition to the two control treatments which are soaking seeds with distilled water and dry seeds. The results showed that the cultivar 5018 was superior in pollen vitality (89.92%), fertility percentage (94.56%) and grain yield (11.47 Mg ha-1). The two treatments of selenium spraying at concentrations of 10 and 20 mg L-1 were superior without significant differences between them and gave the highest means in pollen viability (93.31% and 93.39%), fertility percentage (98.49% and 98.31%) and grain yield (13.07 and 13.55 Mg ha-1).The interaction was significant in the most of studied traits

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