SciELO - Scientific Electronic Library Online

 
vol.36 número6Fitomassa e decomposição de resíduos de plantas de cobertura puras e consorciadasAtributos físicos relacionados à compactação de solos sob vegetação nativa em região de altitude no Sul do Brasil índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Ciência do Solo

versão On-line ISSN 1806-9657

Resumo

MARTINS, Paula Cristina Caruana; DIAS JUNIOR, Moacir de Souza; AJAYI, Ayodele Ebenezer  e  MOREIRA, Fátima Maria de Souza. Structural sustainability of cambisol under different land use system. Rev. Bras. Ciênc. Solo [online]. 2012, vol.36, n.6, pp.1724-1732. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832012000600006.

Incongruous management techniques have been associated with some significant loss of agricultural land to degradation in many parts of the world. Land degradation results in the alteration of physical, chemical and biological properties of the soil, thereby posing a serious threat to sustainable agricultural development. In this study, our objective is to evaluate the changes in a Cambisol structure under six land use systems using the load bearing capacity model. Sampling was conducted in Amazonas Region, Brazil, in the following land use: a) young secondary forest; b) old secondary forest; c) forest; d) pasture; e) cropping, and f) agroforestry. To obtain the load bearing capacity models the undisturbed soil samples were collected in those land use systems and subjected to the uniaxial compression test. These models were used to evaluate which land use system preserved or degraded the Cambisol structure. The results of the bulk density and total porosity of the soil samples were not adequate to quantify structural degradation in Cambisol. Using the forest topsoil level (0-0.03 m) as a reference, it was observed that pasture land use system was most severe in the degradation of the soil structure while the structure were most preserved under old secondary forest, cropping system and forest. At the subsoil level (0.10-0.13 m depth), the soil structure was most degraded in the cropping land use system while it was most preserved in young secondary forest and pasture. At the 0.20-0.23 m depth, soil structure degradation was most severe in the old secondary forest system and well preserved in young secondary forest, cropping and agroforestry.

Palavras-chave : structure degradation; bulk density; precompression stress; Amazonas.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons