Data/hora: 23/09/2024 09:56:02

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