Morphology and stability of aggregates of an Oxisol according to tillage system and gypsum application


Autoria(s): Souza,Fábio Régis de; Rosa Junior,Edgard Jardim; Fietz,Carlos Ricardo; Pellin,Douglas Martins Pereira; Bergamin,Anderson Cristian; Gelain,Evandro; Rosa,Yara Brito Chaim Jardim
Data(s)

01/12/2012

Resumo

Morphological characterization and aggregate stability is an important factor in evaluating management systems. The aim of this paper is to evaluate the stability and morphology of the aggregates of a dystrophic Oxisol managed with no-tillage and conventional tillage with and without the residual action of gypsum. The experimental design was randomized blocks arranged in split-split plot, where the treatments were two soil management systems (plots) with 0 and 2000 kg ha-1 of gypsum (subplots) and five depths (0-0.05, 0.05-0.10, 0.10-0.15, 0.15-0.20 and 0.20-0.30 m) as the subsubplots, with four replications. The aggregate morphology was determined through images and later evaluated by the Quantporo software. Stability was determined by the wet method. The results showed that the no-tillage system, with or without gypsum residual effect, provided the aggregates with the largest geometric diameters. The combination of no-tillage system and the gypsum residual effect provided rougher aggregates.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600017

Idioma(s)

en

Publicador

Universidade Federal de Viçosa

Fonte

Revista Ceres v.59 n.6 2012

Palavras-Chave #soil structure #gypsum #til
Tipo

journal article