Título:	Determinação dos estoques de carbono e nitrogênio nas frações físicas da matéria orgânica em solos antrópicos (Terra Preta de Índio) e não antrópicos da Amazônia Central.
Autoria:	SOARES, R. MADDOCK, J. E. L. CAMPOS, D. V. B. de MADARI, B. E. MACHADO, P. L. O. de A.
Afiliação:	RICARDO SOARES, INEA/UFF; JOHN EDMUND LEWIS MADDOCK, UFF; DAVID VILAS BOAS DE CAMPOS, CNPS; BEATA EMOKE MADARI, CNPAF; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPAF.
Ano de publicação:	2022
Referência:	Revista Virtual de Química, v. 14, n. 2, p. 292-307, mar./abr. 2022.
Conteúdo:	The soil organic matter, as the Amazonian Dark Earths, have functional compartments with different characteristics concerning composition and dynamics and these fractions can be evaluated using physical fractionation, in which the fractions are separated by densimetric and granulometric methods. In the Amazon region, studies involving physical fractionation are scarce. This work aimed to identify the compartments and their carbon and nitrogen stocks, the effect of fallow time, and to evaluate the use of these fractions as indicators of soil quality, in soils collected in areas of Amazonian Dark Earths and non-anthropic soils. Physical fractionation of organic matter was carried out in soil samples from Amazonian Dark Earths and non-anthropic soils, with forest cover. The carbon and nitrogen contents in each fraction were determined, and their stocks. The fallow time influenced the dynamics of organic matter in the Amazonian Dark Earths. The light-free fraction proved to be a sensitive diagnostic attribute in the superficial layers. Fallow or the conversion of intensely cultivated Amazon areas to secondary forests can be a sustainable practice for mitigating carbon and nitrogen losses in the soil, especially in the most labile and reactive fractions present in the most superficial layers of the soil.
Thesagro:	Mudança Climática Estoque Carbono Nitrogênio Solo Matéria Orgânica
NAL Thesaurus:	Climate change Carbon Nitrogen Soil organic matter
Palavras-chave:	Terra Preta de Índio Amazonian Dark Earths
Digital Object Identifier:	http://dx.doi.org/10.21577/1984-6835.20210120
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPS)