Data/hora: 17/06/2024 03:35:10

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 16/05/2024
Data da última atualização: | 11/06/2024
Autoria: | GIROTO, A. S.; GUIMARÃES, G. G. F.; MAJARON, V.; KLAIC, R.; AVANSI, W.; RIBEIRO, C.
Afiliação: | EPAGRI - AGRICULTURAL RESEARCH AND RURAL EXTENSION COMPANY OF SANTA CATARINA; FEDERAL UNIVERSITY OF SÃO CARLOS; FEDERAL UNIVERSITY OF SÃO CARLOS; CAUE RIBEIRO DE OLIVEIRA, CNPDIA.
Título: | Effect of Urea: Hydroxyapatite Composites for Controlled-Release Fertilization to Reduce P Complexation in Soils.
Ano de publicação: | 2024
Fonte/Imprenta: | Communications in Soil Science and Plant Analiysis, v. 55, n. 3, 2024.
Páginas: | 302 - 312
DOI: | https://doi.org/10.1080/00103624.2023.2268645
Idioma: | Inglês
Conteúdo: | ABSTRACT Phosphorous fixation in the soil is the most limiting factor for P-management, and previous studies have indicated that coupling nanoparticulated P sources (e.g. hydroxyapatite) in adequate matrices nanocomposites) can increase nutrient uptake. However, how the nanocomposite affects the P fixation is still an open question. Herein we describe X-ray absorption near edge structure (XANES) experiments to investigate the role of phosphate fertilizer (P) composite in reducing P complexation in soil. Experiments in a greenhouse (maize cultivation) and soil incubation comparatively revealed that a composite formed by the dispersion of hydroxyapatite (phosphate source) into urea could increase the production of dry matter (compared to monoammonium phosphate, MAP), keeping the residual P available in the soil for future cultivations (i.e. not strongly bonded to minerals). This behavior was evidenced by P-XANES, which indicated that the composite induced the bonding of remnant P to more labile organic fractions instead of mineral phases, as seen in MAP cultivation.
Palavras-Chave: | Controlled release; P-complexation; P-speciation.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (18428-1) - UPC - AP - DD - PROCI.24/33 -  - 2024/51 - DIS