Journal Article

FZJ-2021-03017

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Different Zn loading in Urea–Formaldehyde influences the N controlled release by structure modification

Giroto, A. S. ; do Valle, S. F. ; Guimarães, G. G. F. ; Jablonowski, N. D. (Corresponding author)FZJ* ; Ribeiro, C. (Corresponding author) ; Mattoso, L. H. C.

2021
Macmillan Publishers Limited, part of Springer Nature [London]

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Please use a persistent id in citations: http://hdl.handle.net/2128/28643  doi:10.1038/s41598-021-87112-2

Abstract: Nitrogen fertilization has been a critical factor for high crop productivity, where urea is currently the most used N source due to its high concentration and affordability. Nevertheless, urea fast solubilization leads to frequent losses and lower agronomic efficiency. The modification of urea structure by condensation with formaldehyde has been proposed to improve nutrient uptake by plants and to reduce environmental losses. Herein we show that the co-formulation with Zn strongly modifies the N release (in lab conditions) and, more important, the Zn source-ZnSO4 or ZnO-has a critical role. Urea-formaldehyde (UF) served as a matrix for the zinc sources, and chemical characterizations revealed that Zn particles influenced the length of the polymeric chain formation. Release tests in an aqueous medium showed that the UF matrix favors ZnO release and, on the other hand, delays ZnSO4 delivery. Soil incubation with the fertilizer composites proved the slow-release of N from UF, is ideal for optimizing nutritional efficiency. Our results indicated that the ZnO-UF system has beneficial effects for both nutrients, i.e., reduces N volatilization and increases Zn release.

Keyword(s): Chemistry (2nd) ; Biology (2nd)

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Contributing Institute(s):

1. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 2172 - Utilization of renewable carbon and energy sources and engineering of ecosystem functions (POF4-217) (POF4-217)

Appears in the scientific report 2021

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