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Provedor de dados:  Ciência Rural
País:  Brazil
Título:  Response of soil microbiota to nine-year application of swine manure and urea
Autores:  Morales,Diana
Vargas,Mónica Machado
Oliveira,Michele Pottes de
Taffe,Bruna Lunarde
Soares,Claudio Roberto
Data:  2016-02-01
Ano:  2016
Palavras-chave:  Soil microbial activity
Nitrogen amendments
Soil quality.
Resumo:  ABSTRACT: Manure fertilization is a common practice, but little is known about its impacts on soil microbial activity and organic matter. Aiming to evaluate soil microbial response to nine years of successive applications of swine manure, organic carbon (TOC), total nitrogen (TN), pH, microbial biomass carbon (MBC), basal respiration (BR), metabolic quotient (qCO2), and enzyme (ß-glucosidase, phosphatase, arylsulphatase, and FDA) activities were measured in the 0-10cm soil layer, in a no-tillage system. Treatments were: control soil without fertilization (C), and application of two doses (104 and 209kg of N ha-1year-1) of urea (U1 and U2), pig slurry (PS1 and PS2) and deep litter (DL1 and DL2). TOC, TN, soil pH, MBC, and BR increased in soil fertilized with DL, and were lower in U treatments. Soils with U and DL application had higher qCO2, related to different sources of stressors like nutrient imbalance. Phosphatase and ß-glucosidase activities were not affected by treatments, increased with time, and had a strong correlation with MBC. We conclude that long-term swine manure applications increase microbial activity and soil organic matter, mainly in DL form; while urea applications have negative impacts on these indicators.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Universidade Federal de Santa Maria
Relação:  10.1590/0103-8478cr20140565
Formato:  text/html
Fonte:  Ciência Rural v.46 n.2 2016
Direitos:  info:eu-repo/semantics/openAccess

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