Effect of sewage sludge on soil physical properties in a Clayey Oxisol

Graziela Moraes de C. Barbosa, João Tavares Filho, Inês C. de B. Fonseca

Abstract


Studies on sewage sludge, a by-product generated in urban sewage treatment shows that the sludge contains several nutrients, is rich in organic matter, and acts as a soil conditioner, thus improving soil structure. The objective of this study was to assess the physical properties in a Clayey Oxisol (Eutrophic Red Latosol) that received 12t ha-1 (dry weight) of limewashed sewage sludge for two years. Resistance to soil penetration was determined by using the impact penetrometer Model IAA/Planalsucar – STOLF, from topsoil to 0.50 m depth. Non-deformed samples were collected for the physical analyses of soil density and porosity. Results showed that 12 t ha-1 yea –1 of limewashed sludge decreased soil resistance to penetration and soil density, thus increasing total soil porosity.

 

 

 

 


Keywords


Compaction; Physical attributes; Biosolids.



DOI: http://dx.doi.org/10.5433/1679-0359.2007v28n1p65

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional