SciELO - Scientific Electronic Library Online

 
vol.36 número5Estabilidade temporal e variabilidade espacial da distribuição da armazenagem de água no solo numa sucessão feijão/aveia-pretaCapacidade de suporte de carga de um Latossolo Vermelho-Amarelo em uma lavoura cafeeira 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

IORI, Piero; SILVA, Reginaldo Barboza da; DIAS JUNIOR, Moacir de Souza  e  LIMA, José Maria de. Preconsolidation pressure as a tool for sustainability analysis of soil structure of soil classes under different uses . Rev. Bras. Ciênc. Solo [online]. 2012, vol.36, n.5, pp.1448-1456. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832012000500008.

The main environmental problem caused by land use in permanent protection  areas along river banks is the removal of the primary vegetation. Depending on the type and intensity of use, the soil structure of this river banks can be altered and the physical functions modified, especially near the watercourses. The purpose of this study was to evaluate the structural sustainability of three classes of river bank soil using the preconsolidation pressure measurement and thereby assess the impact of these different land uses on river bank stability in the sub-basin of the Ribeira Valley, SP. The experimental area consists of three soil types, Cambisol, Ultisol and Gley soils. In the first analysis, the preconsolidation pressure of the three soil types under native forest and pasture was compared. The second analysis evaluated the influence of different land uses; banana cultivation, degraded pasture, native forest and silvopastoral use on the structure of the Cambisol. Our result showed that preconsolidation pressure values are useful tools to identify soil degradation in these protected areas, since the changing values adequately represent degradation tendencies. The land use in the permanent protection areas resulting in changed preconsolidation pressure tends to cause structural degradation, threatening the sustainability and stability of the land, and should not be allowed. The Gleysol showed higher values   of preconsolidation pressure as a function of increasing water levels and, therefore, greater load support capacity than the Cambisol and Ultisol. Banana was the crop that degraded the soils in the permanent preservation areas most.

Palavras-chave : load support capacity; modeling; Vale do Ribeira.

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

 

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