Improving the efficacy of selenium fertilizers for wheat biofortification

Ramkissoon, Chandnee; Degryse, Fien; da Silva, Rodrigo C.; Baird, Roslyn; Young, Scott D.; Bailey, Elizabeth H.; McLaughlin, Mike J.

Abstract

© 2019, The Author(s). Increasing the selenium (Se) concentration of staple crops by fertilization is a valuable pathway to increase Se in the human diet, thus preventing Se deficiency. A pot trial was set up to investigate whether the application of 3.33 µg kg−1 of Se (equivalent to 10 g ha−1) to wheat can be made more efficient by its co-application with macronutrient carriers, either to the soil or to the leaves. In the soil, Se was applied either on its own (selenate only) or as a granular, Se-enriched macronutrient fertilizer supplying nitrogen, phosphorus, potassium or sulfur. Selenium was also applied to leaves at head emergence with, or without, 2% w/v N fertilizers. With grain Se concentrations varying from 0.13–0.84 mg kg−1, soil application of selenate-only was 2–15 times more effective than granular Se-enriched macronutrient fertilizers in raising grain Se concentrations. Co-application of foliar Se with an N carrier doubled the Se concentration in wheat grains compared to the application of foliar Se on its own, the majority of which was in the highly bioavailable selenomethionine fraction. Results from this study demonstrate the possibility of improving the efficacy of Se fertilizers, which could enrich crops with Se without additional application costs in the field.

Citation

Ramkissoon, C., Degryse, F., da Silva, R. C., Baird, R., Young, S. D., Bailey, E. H., & McLaughlin, M. J. (2019). Improving the efficacy of selenium fertilizers for wheat biofortification. Scientific Reports, 9, Article 19520. https://doi.org/10.1038/s41598-019-55914-0

• Journal Article Type: Article
• Acceptance Date: Nov 12, 2019
• Online Publication Date: Dec 20, 2019
• Publication Date: Dec 20, 2019
• Deposit Date: Feb 3, 2020
• Publicly Available Date: Feb 5, 2020
• Journal: Scientific Reports
• Electronic ISSN: 2045-2322
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Article Number: 19520
• DOI: https://doi.org/10.1038/s41598-019-55914-0
• Public URL: https://nottingham-repository.worktribe.com/output/3660310
• Publisher URL: https://www.nature.com/articles/s41598-019-55914-0