Qualidade estrutural de um latossolo vermelho submetido à compactação
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Data
2013-05-01
Autores
de Oliveira, Paula Regina [UNESP]
Centurion, José Frederico [UNESP]
da Cruz Centurion, Maria Aparecida Pessôa [UNESP]
Rossetti, Karina de Vares [UNESP]
Ferraudo, Antonio Sergio [UNESP]
Franco, Helena Baroni Junqueira [UNESP]
Pereira, Fabiana de Souza [UNESP]
Júnior, Laerte Souza Bárbaro [UNESP]
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Resumo
The structure change caused by soil compaction is a limiting factor to growth and development of plants. The objective of this study was to evaluate the physical parameters of an Eutrophic Oxisol in Jaboticabal, SP. Aggregate stability, hydraulic conductivity and S index were evaluated in a completely randomized split-plot (four levels of compaction and two depth), with four replications and an area of native forest (NF) as control. The compaction treatments consisted of C0 = 0, C1 = 2, C2= 4 and C3 = 6 tractor passed of 11 Mg. It was observed that NF had high rates compared to GMD (geometric mean diameter) and WMD (weighted mean diameter) with larger and more stable aggregates compared to other treatments. The S value of 0,036 and a reduction in the most compacted levels to 0,026 were obtained, since the compaction reduced the value of S, which reached its limiting value (< 0,035) despite the oxidic mineralogy of the analyzed soil.
Descrição
Palavras-chave
Aggregation, Multivariate analysis, Soil physics, Water retention
Como citar
Revista Brasileira de Ciencia do Solo, v. 37, n. 3, p. 604-612, 2013.