Abstract
Two experiments were carried out during the spring season 2022 in Diyala Governorate to investigate the effect of foliar spraying with zinc and ascorbic acid on some antioxidants of maize. The experiment was carried out in split-split plot system within RBCD design with three levels of temperature (0, 35, 40) °C, three concentrations of zinc (0,100, 200) mg Zn. L−1, and three concentrations of ascorbic acid (0, 100, 200) mg C.L−1. The results showed a superiority concentration of 200 mg.L−1 for each of zinc and ascorbic acid in all studied traits. Which record in proline 5.15 and 5.23 mg.g−1 dw, catalase 49.74 and 49.51 U.min.g−1 fw., and peroxidase 52.16 and 51.74 U.min.g−1 fw respectively, while the heat shock 30°C and 40°C exceeded the level of non-exposure to heat in all characteristics. The results also showed that the binary interaction between zinc and heat, ascorbic and heat had a significant effect on the studied characteristics. The interaction Zn200 XT35 and C200 X35 excelled in all of the study characteristics compared to other interaction, and the results also showed the superiority of the triple interaction treatments Zn200* C200 * T35 in all studied traits.
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