Data/hora: 09/06/2024 11:49:12

Biblioteca(s): | Embrapa Solos.
Data corrente: | 08/10/2012
Data da última atualização: | 03/11/2021
Autoria: | BALIEIRO, F. de C.; BENITES, V. de M.; CAIAFA, A. N.; ALVES, B. J. R.; FONTANA, A.; CANELLAS, L. P.
Afiliação: | FABIANO DE CARVALHO BALIEIRO, CNPS; VINICIUS DE MELO BENITES, CNPS; Alessandra Nasser Caiafa, Universidade Federal do Reconcavo da Bahia; BRUNO JOSE RODRIGUES ALVES, CNPAB; ADEMIR FONTANA, CNPS; Luciano Pasqualoto Canellas, Universidade Estadual do Norte Fluminense Darcy Ribeiro.
Título: | Vegetation influence on organic matter source of black soils from high altitude rocky complexes traced by 13C and 15N isotopic techniques.
Ano de publicação: | 2012
Fonte/Imprenta: | Catena, v. 99, p. 97-101, 2012.
DOI: | https://doi.org/10.1016/j.catena.2012.06.004
Idioma: | Inglês
Conteúdo: | The organic soil layer (0-35 cm) of seventeen sites under high altitude rocky complexes (HARC) was sampled in eastern Brazil to evaluate the relationship of vegetation type and carbon and nitrogen isotopic composition of bulk soil and humic acid (HA). The 13C and 15N values obtained for bulk soil and for AH (extracted with NaOH 0.1 mol L-1) were not statistically different (pb0.05). Also, the high C to N ratio, and lower E4/E6 and TGI corroborate with the hypothesis that bulk soil organic matter (SOM) and HA have similar characteristics and high recalcitrance. The majority of sites in the HARC presented a soil organic matter originated from C3-vegetation and demonstrated an intense N cycling based on the 15N data. Even though charcoal could be suggested as a component of soil genesis for most of the HARC sites, the raised data was not consistent to consider fire a key process for soil organic matter existence in these areas.
Palavras-Chave: | Ácidos Húmicos.
Thesagro: | Matéria Orgânica.
Thesaurus Nal: | soil organic matter; stable isotopes.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (16800-1) - UPC - AP - DD -  -  - 2012.00178 - DIS