Busca avançada
Ano de início
Entree


Zinc loading in urea-formaldehyde nanocomposites increases nitrogen and zinc micronutrient fertilization efficiencies in poor sand substrate

Texto completo
Autor(es):
Giroto, Amanda S. ; do Valle, Stella F. ; Guimaraes, Gelton G. F. ; Wuyts, Nathalie ; Ohrem, Benedict ; Jablonowski, Nicolai D. ; Ribeiro, Caue ; Mattoso, Luiz Henrique C.
Número total de Autores: 8
Tipo de documento: Artigo Científico
Fonte: Science of The Total Environment; v. 841, p. 10-pg., 2022-10-01.
Resumo

Agricultural output needs significant increases to feed the growing population. Fertilizers are essential for plant production systems, with nitrogen (N) being the most limiting nutrient for plant growth. It is commonly supplied to crops as urea. Still, due to volatilization, up to 50 % of the total N application is lost. Slow or controlled release fertilizers are being developed to reduce these losses. The co-application of zinc (Zn) as a micronutrient can increase N absorption. Thus, we hypothesize that the controlled delivery of both nutrients (N and Zn) in an integrated system can improve uptake efficiency. Here we demonstrate an optimized fertilizer nanocomposite based on urea:urea-formaldehyde matrix loaded with ZnSO(4 )or ZnO. This nanocomposite effectively stimulates maize development, with consequent adequate N uptake, in an extreme condition - a very nutrient-poor sand substrate. Our results indicate that the Zn co-application is beneficial for plant development. However, there were advantages for ZnO due to its high Zn content. We discuss that the dispersion favors the Zn delivery as the nanoparticulated oxide in the matrix. Concerning maize development, we found that root morphology is altered in the presence of the fertilizer nanocomposite. Increased root length and surface area may improve soil nutrient uptake, potentially accompanied by increased root exudation of essential compounds for N release from the composite structure. (AU)

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
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