Foliar Biofortification of Maize ( Zea mays L.) with Selenium: Effects of Compound Type, Application Rate, and Growth Stage

Tomáš Mrština, Lukáš Praus, Jiřina Száková, Lukáš Kaplan and Pavel Tlustoš ()
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Tomáš Mrština: Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, 165 00 Prague, Czech Republic
Lukáš Praus: Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, 165 00 Prague, Czech Republic
Jiřina Száková: Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, 165 00 Prague, Czech Republic
Lukáš Kaplan: Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, 165 00 Prague, Czech Republic
Pavel Tlustoš: Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, 165 00 Prague, Czech Republic

Agriculture, 2024, vol. 14, issue 12, 1-15

Abstract: Nowadays, attention is focused on the lack of selenium in the average diet, which is a highly valued element in the body’s antioxidant system. The major metabolites of selenium are selenoproteins, which have an irreplaceable function in the body. This study focused on optimizing conditions for the biofortification of maize ( Zea mays L.) with selenium (Se). Three separate pot experiments were conducted to identify the key factors influencing the efficacy of foliar selenium application. The experiments were designed to investigate the effects of different forms of selenium (selenite, selenate, and selenium nanoparticles) on maize development, the influence of the phenological stage of maize at the time of foliar Se application, and the optimal application rate of Se (100, 150, 200, or 250 µg). The results indicated that sodium selenate without a wetting agent was the most effective form for enhancing total Se content in maize, with the greatest accumulation being in leaves (3.01 mg/kg dry matter). Phenological stages (BBCH) 51 and 60 were identified as the most suitable phenological stages for Se application in terms of total Se content about 1 mg/kg in leaves and about 0.4 mg/kg in grain and the presence of organic Se compounds (mostly selenate ion and selenomethionine). We concluded from the study that a foliar application of 200 µg of sodium selenate per pot during these stages resulted in maximum Se uptake without adversely affecting plant yield. Further research is recommended to validate these findings under field conditions, paving the way for improved agricultural practices in selenium biofortification.

Keywords: sodium selenate; sodium selenite; selenium nanoparticles; phenological phase; pot experiment (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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