Alteration on physical characteristics of the soil decurrent from application of treated domestic sewage/Alteracao nas caracteristicas fisicas do solo decorrentes da aplicacao de esgoto domestico tratado

This study examined the alteration on physical characteristics of the soil decurrent from application of treated domestic sewage. The randomized blocks design was used with three replicates. The soil of the experimental area is Cambissolo; the topography is rugged; the climate is Cwb with rainy summ...

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Veröffentlicht in:Acta scientiarum. Technology 2010-10, Vol.32 (4), p.361
Hauptverfasser: de Souza, Jose Alberto Alves, Batista, Rafael Oliveira, Ramos, Marcio Mota, Soares, Antonio Alves
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Sprache:spa
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Zusammenfassung:This study examined the alteration on physical characteristics of the soil decurrent from application of treated domestic sewage. The randomized blocks design was used with three replicates. The soil of the experimental area is Cambissolo; the topography is rugged; the climate is Cwb with rainy summer and cold and dry winter; the applications of the domestic sewage were via drip irrigation system. The treatments were: T--non-irrigated soil; MC--soil with application of clean water; and MR --soil with application of treated domestic sewage. Soil samples were collected in the layers of 0 to 0.20, 0.20 to 0.40, and 0.40 to 0.60 m for physical analysis (bulk density, microporosity, macroporosity, field capacity, wilting point and hydraulic conductivity). The results evidenced that MC and MR increased the bulk density, microporosity and field capacity, however diminished the macroporosity and hydraulic conductivity of the soil in relation to the T. Key words: wastewater, trickle application, macro and microporosity. Neste trabalho, teve-se como objetivo estudar a alteracao nas caracteristicas fisicas do solo decorrentes da aplicacao de esgpto domestico tratado. O experimento foi montado no delineamento em blocos casualizados (DBC) com tres repeticoes. O solo da area experimental e Cambissolo; o relevo e acidentado; o clima e Cwb com veroes chuvosos e invernos frios e secos; as aplicacoes da agua doce e do esgoto domestico tratado foram feitas via sistema de irrigacao por gotejamento. Os seguintes tratamentos foram usados: T solo sem irrigacao; MC--solo com aplicacao de agua doce e MR--solo com aplicacao de esgoto domestico tratado. Amostras de solo foram coletadas nas camadas de 0 a 0,20; 0,20 a 0,40 e 0,40 a 0,60 m para analises fisicas (massa especifica do solo, microporosidade, macroporosidade, capacidade de campo, ponto de murcha permanente e condutividade hidraulica). Os resultados comprovaram que MC e MR aumentaram a massa especifica, a microporosidade e a capacidade de campo e que diminuiram a macroporosidade e a condutividade hidraulica do solo em relacao a T. Palavras-chave: agua residuaria, aplicacao localizada, macro e microporosidade.
ISSN:1806-2563
DOI:10.4025/actascitechnol.v32i4.5349