Data/hora: 17/06/2024 08:03:58

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	22/04/2020	
Data da última atualização: 	29/07/2020	
Autoria: 	FONTANA, A.; PEREIRA, M. G.; BALIEIRO, F. de C.; CHAGAS, C. da S.; DONAGEMMA, G. K.; OLIVEIRA, L. S de.	
Afiliação: 	ADEMIR FONTANA, CNPS; MARCOS GERVASIO PEREIRA, UFRRJ; FABIANO DE CARVALHO BALIEIRO, CNPS; CESAR DA SILVA CHAGAS, CNPS; GUILHERME KANGUSSU DONAGEMMA, CNPS; LUCIENNE SILVA DE OLIVEIRA, PESQUISADORA INDEPENDENTE-RJ.	
Título: 	Resistance of soil organic matter in "humic A horizons" of the mountainous region in the state of Rio de Janeiro.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Floresta e Ambiente, v. 27, n. 1, e20190091, 2020.	
DOI: 	http://dx.doi.org/10.1590/2179-8087.009119	
Idioma: 	Inglês	
Conteúdo: 	Soils with high organic carbon content, such as those with "humic A horizon", occur in different regions of Brazil. This study aimed to determine the quantitative and qualitative characteristics of organic matter regarding the humic A horizon under different land uses in Bom Jardim, in Rio de Janeiro State, Brazil. Samples from forest, pasture, Eucalyptus plantation, coffee cultivation, olericulture, and also passion fruit soils were sampled and analyzed. In October 2011, undisturbed samples from humic A horizons, were collected for soil density analysis. In addition, disturbed samples were collected for the determination of organic carbon (C-org) content, total carbon, humic substance fractions contents and natural abundance of (13)Carbon (delta C-13). Low C-org contents were observed in areas under olericulture, pasture and passion fruit cultivation. The fulvic acid fraction was higher than other fractions, regardless of land use. The small variability in delta C-13 indicated maintenance of original C-org and suggest high resistance of Soil Organic Matter in humic A horizons.	
Palavras-Chave: 	Carbono orgânico; Composição isotópica; Substâncias húmicas.	
Thesagro: 	Carbono; Horizonte.	
Thesaurus Nal: 	Humic substances; Soil organic carbon.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/212438/1/Resistance-of-soil-organic-matter-in-humic-A-horizons-of-the-mountainous-region-in-the-state-of-Rio-de-Janeiro-2020.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (20457-1) - UPC - AP - DD -  -  - 2020 - DIS