Atributos microbianos do solo fertilizado com composto de lodo de esgoto/Soil microbial attributes treated with composting of sewage sludge

The use of sludge composting in agricultural areas alters the microbial functions. In this context it is necessary to evaluate the impact of composting addition on microbial activities in the soil. This study evaluated the alteration of microbial attributes of a soil fertilized with sewage sludge co...

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Bibliographic Details
Published inRevista ambiente & água Vol. 7; no. 2; p. 49
Main Authors Suszek, Ericléia Büerg, Neto, Paulo tes, tes, Nara Lúcia Perondi, da Silva, Eliana Maria de Araújo Mariano, Brambatti, Fabiana, Silva, Claudio Roberto, Patrocinio, Dimas Donizeti
Format Journal Article
LanguagePortuguese
Published Taubaté Instituto de Pesquisas Ambientais em Bacias Hidrográficas 01.05.2012
Subjects
Bacteria
Composting
Fungi
Sludge
Soil contamination
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Summary:The use of sludge composting in agricultural areas alters the microbial functions. In this context it is necessary to evaluate the impact of composting addition on microbial activities in the soil. This study evaluated the alteration of microbial attributes of a soil fertilized with sewage sludge compost by measuring the CO2 release rates and counting bacteria and fungi numbers. This experiment was conducted in laboratory using respirometric jars that contained samples of soil mixed with different doses of compost: 0; 20; 40; 60 and 80 Mg ha^sup -1^, and CO2 release was quantified daily during the 28 days of incubation when the samples were removed from the jars and bacteria and fungi quantities were counted. The treatments corresponding to each dose of the composting were arranged in completely randomized design with four replications. The CO2 release and the quantity of bacteria and fungi increased with additional doses of the compound. This occurred as a result of supplying energetic substrate and nutrients from the compound. The CO2 released measurements indicated that compound above 20 Mg ha^sup -1^ has significant impact on soil microbial activity. [PUBLICATION ABSTRACT]
ISSN:1980-993X