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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 11, n. 1 APR 7 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 16/09343-6 - Desenvolvimento e avaliação agronômica de um novo fertilizante baseado em nanocompósitos enxofre-fosfatos minerais
• Beneficiário: Gelton Geraldo Fernandes Guimarães
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/10104-1 - Preparação de Nanocompósitos a partir de Ureia modificada com Glicerol para otimização do Processo de Liberação Controlada de Nutrientes
• Beneficiário: Amanda Soares Giroto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
• Beneficiário: Roberto de Campos Giordano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático