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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Soil functioning in a toposequence under rainforest in São Paulo, Brazil

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Author(s):
Cooper, Miguel [1] ; Medeiros, Joao Carlos [2] ; Dalla Rosa, Jaqueline [2] ; Soria, Jose Eduardo [3] ; Shiso Toma, Raul [4]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Dept Ciencia Solo, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba, SP - Brazil
[2] Embrapa Arroz & Feijao CNPAF, BR-75375000 Santo Antonio De Goias, Go - Brazil
[3] Ctr Tecnol Canavieira, BR-13400970 Piracicaba, SP - Brazil
[4] Univ Nacl Rio Cuarto, Cordoba - Argentina
Total Affiliations: 4
Document type: Journal article
Source: Revista Brasileira de Ciência do Solo; v. 37, n. 2, p. 392-399, MAR-APR 2013.
Web of Science Citations: 4
Abstract

Studies of soil-water dynamics using toposequences are essential to improve the understanding of soil-water-vegetation relationships. This study assessed the hydro-physical and morphological characteristics of soils of Atlantic Rainforest in the Parque Estadual de Carlos Botelho, state of São Paulo, Brazil. The study area of 10.24 ha (320 x 320 m) was covered by dense tropical rainforest (Atlantic Rainforest). Based on soil maps and topographic maps of the area, a representative transect of the soil in this plot was chosen and five soil trenches were opened to determine morphological properties. To evaluate the soil hydro-physical functioning, soil particle size distribution, bulk density (r), particle density (r s), soil water retention curves (SWRC), field saturated hydraulic conductivity (Ks), macroporosity (macro), and microporosity (micro) and total porosity (TP) were determined. Undisturbed samples were collected for micromorphometric image analysis, to determine pore size, shape, and connectivity. The soils in the study area were predominantly Inceptisols, and secondly Entisols and Epiaquic Haplustult. In the soil hydro-physical characterization of the selected transect, a change was observed in Ks between the surface and subsurface layers, from high/intermediate to intermediate/low permeability. This variation in soil-water dynamics was also observed in the SWRC, with higher water retention in the subsurface horizons. The soil hydro-physical behavior was influenced by the morphogenetic characteristics of the soils. (AU)

FAPESP's process: 99/09635-0 - Diversity, dynamics and conservation in São Paulo State Forests: 40ha of permanent parcels
Grantee:Ricardo Ribeiro Rodrigues
Support Opportunities: BIOTA-FAPESP Program - Thematic Grants