Data/hora: 17/06/2024 01:01:13

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	03/02/2016	
Data da última atualização: 	04/03/2016	
Autoria: 	OLIVEIRA, J. F. de; BROSSARD, M.; CORAZZA, E. J.; MARCHAO, R. L.; VENDRAME, P. R. S.; BRITO, O. R.; GUIMARAES, M. de F.	
Afiliação: 	JOSÉ FRANCIRLEI DE OLIVEIRA, UEL; MICHEL BROSSARD, UEL; EDEMAR JOAQUIM CORAZZA, SCT; ROBELIO LEANDRO MARCHAO, CPAC; PEDRO RODOLFO SIQUEIRA VENDRAME, UEL; OSMAR RODRIGUES BRITO, UEL; MARIA DE FÁTIMA GUIMARÃES, UEL.	
Título: 	Vis-NIR spectrometry, soil phosphate extraction methods and interactions of soil attributes.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Química Nova, São Paulo, v. 38, n. 3, p. 342-350, Mar. 2015	
ISSN: 	0100-4042	
DOI: 	http://dx.doi.org/10.5935/0100-4042.20150009	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The objective of this study was to evaluate the relationships between the spectra in the Vis-NIR range and the soil P concentrations obtained from the P-M and P-rem extraction methods as well as the effects of these relationships on the construction of models predicting P concentration in Oxisols. Soil samples' spectra and their P-M and P-rem extraction solutions were determined for the Vis-NIR region between 400 and 2500 nm. Mineralogy and/ or organic matter content act as primary attributes allowing correlation of these soil phosphorus fractions with the spectra, mainly at wavelengths between 450-550, 900-1100 nm, near 1400 nm and between 2200-2300 nm. However, the regression models generated were not suitable for quantitative phosphate analysis. Solubilization of organic matter and reactions during the P-M extraction process hindered correlations between the spectra and these P soil fractions. For P-rem,, the presence of Ca in the extractant and preferential adsorption by gibbsite and iron oxides, particularly goethite, obscured correlations with the spectra.	
Palavras-Chave: 	Espectroscopia do infravermelho próximo (NIR); Espectroscopia na região do visível (VIS); Espectroscopia VIS/NIR.	
Thesagro: 	Análise do solo; Espectrometria; Extração; Fosfato; Latossolo.	
Thesaurus Nal: 	Extraction; Oxisols; Phosphates; Soil analysis; Spectroscopy.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/138369/1/35149.pdf	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (35149-1) - UPC - AP - PP - S2053 -  - S2053 - DIS