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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Different Zn loading in Urea-Formaldehyde influences the N controlled release by structure modification

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Giroto, Amanda S. [1] ; do Valle, Stella F. [2, 1] ; Guimaraes, Gelton G. F. [3] ; Jablonowski, Nicolai D. [4] ; Ribeiro, Caue [1] ; Mattoso, Luiz Henrique C. [1]
Total Authors: 6
[1] Embrapa Instrumentacao, Natl Nanotechnol Lab Agribusiness LNNA, XV Novembro St 741, BR-13560206 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Chem, Washington Luiz Highway, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[3] Agr Res & Rural Extens Co Santa Catarina, 6800 Highway, BR-88318112 Itajai, SC - Brazil
[4] Forschungszentrum Julich, Inst Bio & Geosci, IBG 2 Plant Sci, D-52425 Julich - Germany
Total Affiliations: 4
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 11, n. 1 APR 7 2021.
Web of Science Citations: 0

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. (AU)

Grantee:Gelton Geraldo Fernandes Guimarães
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/10104-1 - Nanocomposites Preparation from Urea modified with Glycerol for optimization of Process of Controlled Release of Nutrients
Grantee:Amanda Soares Giroto
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales
Grantee:Roberto de Campos Giordano
Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants