Data/hora: 24/09/2024 06:38:14

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	14/11/2018	
Data da última atualização: 	14/11/2018	
Autoria: 	GOMES, J. B. V.; SILVA, C. A.; FERREIRA, T. L. de A.; FERREIRA, M. M.; INDA, A. V.; CURI, N.	
Afiliação: 	JOAO BOSCO VASCONCELLOS GOMES, CNPF; Carlos Alberto Silva, UFLA; Tamara Letícia de Azevedo Ferreira, UFLA; Mozart Martins Ferreira, UFLA; Alberto Vasconcellos Inda, UFRGS; Nilton Curi, UFLA.	
Título: 	Carbon stocks and pools in relation to the texture of kaolinitic soils from the Brazilian East Coast.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 42, e0170260, set. 2018. 15 p.	
DOI: 	10.1590/18069657rbcs20170260	
Idioma: 	Inglês	
Conteúdo: 	Extremely kaolinitic soils of Tertiary age elevations on the Brazilian east coast present a wide range of texture, which is recognized as one of the main factors controlling the soil organic matter contents. This study aimed to investigate the organic C storage of different compartments of kaolinitic soils. The studied soils had a wide particle size gradient, were under native forest vegetation, and located on Brazil?s eastern coast (Coruripe - CF, Umbaúba - UF, Nova Viçosa - VF, Sooretama - SF, and Itaboraí - IF). The forest cover of all sites allows to record soil properties reference values for a land use condition closer to that of the original sites. We determined soil organic C (SOC) content and SOC stock up to a depth of 1 m, C of topsoil (0.00-0.08 m), aggregate size classes, and dissolved organic carbon (DOC) of the soil surface horizon (A horizon). Soil C stocks at the 0.00-1.00 m depth ranged from 105 to 137 Mg ha-1 and were not regulated by soil texture. The SF soils stored more C up to a depth of 1 m, while lower mean C stocks were found for UF and CF soils. Soil texture was not a reliable index to predict the C contents of the aggregate size classes of the 0.00-0.08 m layer (within each class and in total, using equivalent soil mass of the classes). The most clayey soils had a high percentage of 2-4 mm aggregates and, as a consequence, high aggregate stability indices, which are positively correlated to silt plus clay contents of the soil surface horizon. The proportion of DOC in relation to the total organic C of the surface soil horizon was high for IF and UF areas, which are the less preserved forest fragments among all studied fragments.	
Palavras-Chave: 	Aggregate size distribution; Argilito caolítico; Coastal tablelands; Dissolved organic C; Estoque de carbono; Organic matter-mineral complexes.	
Thesagro: 	Solo.	
Thesaurus Nal: 	Soil.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/186008/1/2018-J.Bosco-RBCS-Carbon.pdf	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (56552-1) - UPC - AP - DD -  -  -  - DIS