Título:	Soil attributes under agroecosystems and forest vegetation in the coastal tablelands of Northestern Brazil.
Autoria:	GOMES, J. B. V. FERNANDES, M. F. BARRETO, A. C. ARAUJO FILHO, J. C. de CURI, N.
Afiliação:	JOAO BOSCO VASCONCELLOS GOMES, CNPF; MARCELO FERREIRA FERNANDES, CPATC; ANTONIO CARLOS BARRETO, CPATC; JOSE COELHO DE ARAUJO FILHO, CNPS; Nilton Curi, UFLA.
Ano de publicação:	2012
Referência:	Ciência e Agrotecnologia, Lavras, v. 36, n. 6, p. 649-664, nov./dez. 2012.
Conteúdo:	This study evaluated the changes occurred in a set of soil attributes, particularly those related to the dynamics of soil organic carbon (SOC), as a function of the replacement of native forest for agricultural ecosystems of regional importance in the coastal tablelands of Northeastern Brazil (orange, coconut, eucalyptus and sugarcane). Six commercial sites under these agroecosystems were compared to neighboring areas of native forest in five areas along this region (Coruripe, Umbaúba, Acajutiba, Cruz das Almas and Nova Viçosa). Soil samples were taken from 0-5 and 5-20 cm depth and analyzed for particle size distribution, bulk density, organic C (OC), particulate organic matter, C in soil solution, microbial biomass C, total cation exchange capacity and water stable aggregates. Linear correlation and multivariate techniques were used for data analysis. The values of base saturation and Al saturation for the 0-20 cm depth layer were also calculated. In all the studied areas, soils under native forest presented better status of physical and chemical attributes than their agroecosystem counterparts, especially in the 0-5 cm layer. For both layers, OC content was the attribute most strongly correlated with the overall changes in all attributes. Unexpectedly, the OC content showed no significant correlation with the sum of silt and clay contents. The set of variables investigated in this study is sensitive to differentiate the quality of soils under perennial and semi-perennial land uses from their counterparts under natural vegetation in the landscapes of the coastal tablelands of Northeastern Brazil.
NAL Thesaurus:	kaolinitic soils
Palavras-chave:	Cohesive soils Organic C Coastal tablelands Caráter coeso C orgânico Tabuleiros costeiros Solos cauliníticoS
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPF)