Data/hora: 17/06/2024 20:10:35

Biblioteca(s): 	Embrapa Solos.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 2	
Data corrente: 	04/12/2017	
Data da última atualização: 	10/11/2021	
Autoria: 	MARANHÃO, D. D. C.; PEREIRA, M. G.; FONTANA, A.; VITAL, V. F.; VALLADARES, G. S.	
Afiliação: 	DEYVID DIEGO CARVALHO MARANHÃO, UFRRJ; MARCOS GERVASIO PEREIRA, UFRRJ; ADEMIR FONTANA, CNPS; VANESSA FRANCIELI VITAL, UEM; GUSTAVO SOUZA VALLADARES, UFPI.	
Título: 	Comparison of methods for determination of carbon in calcareous soils.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Communications in Soil Science and Plant Analysis, v. 48, n. 14, p. 1646-1658, 2017.	
DOI: 	https://doi.org/10.1080/00103624.2017.1373797	
Idioma: 	Inglês	
Conteúdo: 	The global cycle of carbon (C) has raised attention in recent decades due to the great increase in carbon dioxide levels (CO2) levels in the atmosphere and its influence on climate change. Calcareous soils represent a significant fraction of the areas with potential for agriculture and have differential attributes, such as high calcium contents, magnesium, carbonates, and pH values. These attributes have been ignored in analytical procedures despite these characteristics, resulting in an overestimation or underestimation of the soil carbon. Several methods have been proposed for determining the soil carbon contents, however, studies evaluating the analytical procedures of C quantification methods, considering the soil characteristics, such as the calcareous soils, are needed, in order to improve their accuracy. Therefore, the objective of this work was to evaluate and compare methods for C determination and to propose adjustments in the methodology for calcareous soil analysis. The Yeomans and Bremner (YB) was the most efficient method for quantification of organic C among the wet oxidation methods. On the other hand, the Donagemma (WB) method underestimated the organic carbon contents. The results showed that the samples must be macerated and pretreated with a hydrochloric acid solution for the use of CHNS-O, in order to eliminate carbonates in the form of nodules and concretions.	
Palavras-Chave: 	Análise química do solo; Carbonatos.	
Thesagro: 	Oxidação.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (19719-1) - UPC - AP - DD -  -  - 2017.00276 - DIS