Data/hora: 07/06/2024 02:19:10

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	10/01/2007	
Data da última atualização: 	14/08/2020	
Autoria: 	VALLADARES, G. S.; PEREIRA, M. G.; ANJOS, L. H. C. dos; BENITES, V. de M.; EBELING, A. G.; MOUTA, R. de O.	
Afiliação: 	Gustavo Souza Valladares, Embrapa Monitoramento por Satélite; Marcos Gervasio Pereira, UFRRJ; Lúcia Helena Cunha dos Anjos, UFRRJ; VINICIUS DE MELO BENITES, CNPS; Adierson Gilvani Ebeling, UFRRJ; Rondinele de Oliveira Mouta, PUC-Rio.	
Título: 	Humic substance fractions and attributes of histosols and related high-organic-matter soils from Brazil.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Communications in Soil Science and Plant Analysis, v. 38, n. 5, p. 763-777, 2007.	
DOI: 	10.1080/00103620701220759	
Idioma: 	Inglês	
Conteúdo: 	Knowledge of the distribution of soil organic matter (SOM) fractions is important in managing soils toward a sustainable agricultural system in a tropical environment. However, data on Histosols is limited. This study developed 19 profiles of Histosols and soils with high organic-matter content from different regions of Brazil. Soil organic matter was fractionated into fulvic acids (FAF), humic acids (HAF), and humin (HUM). The ratios HAF/FAF and AE (alkaline extract)/HUM were calculated. The objectives were to evaluate the method for SOM fractionating in Histosols and related soils and to correlate the distribution of organic fractions with other soil attributes. The humic fractions presented significant correlations with other soil attributes, the best being the correlation between FAF and nutrient level. The HAF and HUM presented high correlation with cationic exchange capacity, active acidity (Hþ) and pH. Humin and the alkaline extract absorbance measured at 380 nm and 465 nm and presented good correlation with total organic carbon.	
Palavras-Chave: 	Matéria orgânica do solo.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (12744-1) - UPC - AP - DD -  -  - 2008.00007 - DIS