Uptake competition between selenium and sulphur fertilizers in sequential harvests of ryegrass: A stable isotope study

Jiang, Linxi; Young, S. D.; Bailey, E. H.; Broadley, M. R.; Graham, N. S.; McGrath, S. P.

Abstract

The demand for sulphur (S) fertilizers has increased due to declining S emissions from coal burning and subsequent deposition on agricultural land. Slow-release S may only be beneficial for grass Selenium (Se) status initially and less beneficial for the later harvests. Applied selenate is more phytoavailable than selenite, however, its residual availability is reduced to a very low level within a short time. Besides, applied S seems to enhance residual selenate phytoavailability, especially when soil environmental S status is decreased in later harvests. In contrast, applied selenite is rapidly adsorbed in soil and can be a stable long-term Se pool available for plant uptake albeit at a comparatively low level of availability. The Se isotopic composition was analyzed in the harvested grass samples. Slow-release S may only be beneficial for grass Se status initially and less beneficial for the later harvests.

Citation

Jiang, L., Young, S. D., Bailey, E. H., Broadley, M. R., Graham, N. S., & McGrath, S. P. (2019, October). Uptake competition between selenium and sulphur fertilizers in sequential harvests of ryegrass: A stable isotope study. Presented at 6th International Conference on Selenium in the Environment and Human Health (ICSEHH 2019), Yangling, Xi'an, China

• Presentation Conference Type: Edited Proceedings
• Conference Name: 6th International Conference on Selenium in the Environment and Human Health (ICSEHH 2019)
• Start Date: Oct 27, 2019
• End Date: Oct 30, 2019
• Acceptance Date: Oct 4, 2019
• Online Publication Date: Oct 4, 2019
• Publication Date: 2019
• Deposit Date: Apr 25, 2021
• Pages: 57-58
• Series Title: International Conference on Selenium in the Environment and Human Health
• Book Title: Selenium Research for Environment and Human Health: Perspectives, Technologies and Advancements - Proceedings of the 6th International Conference on Selenium in the Environment and Human Health, 2019
• ISBN: 9781138390140
• DOI: https://doi.org/10.1201/9780429423482-27
• Public URL: https://nottingham-repository.worktribe.com/output/4007340
• Publisher URL: https://www.taylorfrancis.com/chapters/edit/10.1201/9780429423482-27/uptake-competition-selenium-sulphur-fertilizers-sequential-harvests-ryegrass-stable-isotope-study-jiang-young-bailey-broadley-graham-mcgrath