Effects of pig slurry application on the diversity and activity of soil biota in pasture areas/Diversidade e atividade da biota do solo na avaliacao dos efeitos da aplicacao de dejetos de suinos em areas de pastagem

The successive application of pig slurry to pastures is a common practice in southern Brazil, serving as a method of waste disposal as well as an important alternative to chemical fertilization. Although there are economic benefits to the use of manure as fertilizer, it may be associated with enviro...

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Bibliographic Details
Published in:Ciência rural 2016-10, Vol.46 (10), p.1756
Main Authors: da Silva, Danni Maisa, Jacques, Rodrigo Josemar Seminoti, da Silva, Diego Armando Amaro, Santana, Natielo Almeida, Vogelmann, Eduardo, Eckhardt, Daniel Pazzini, Antoniolli, Zaida Ines
Format: Article
Language:English
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Summary:The successive application of pig slurry to pastures is a common practice in southern Brazil, serving as a method of waste disposal as well as an important alternative to chemical fertilization. Although there are economic benefits to the use of manure as fertilizer, it may be associated with environmental hazards and cause changes to composition and activity of soil fauna. This study aimed to study the effects of pig slurry on the soil biota of pastures. Composition and biological activity of pastures where manure was applied successively for 2 years (A2) and 14 years (A14) were evaluated, and native forest (NF) was analyzed as a reference area. Successive application of pig slurry to the soil changed its biological characteristics according to the time of implementation; influenced the composition and diversity of soil fauna, leading to an increase in the total number of individuals, especially springtails; and increased the activity of the soil biota, especially to a depth of 6cm. Key words: organic fertilization, soil fauna, bait lamina. O uso sucessivo de dejetos de suinos em areas de pastagem tem sido uma pratica comum na regiao sul do Brasil, tendo em vista a necessidade de deposicao dos dejetos produzidos, alem de ser uma importante alternativa a fertilizacao das pastagens. Embora existam beneficios economicos do uso dos dejetos como fertilizante, estes podem estar associados a riscos ambientais e causar alteracoes na composicao e atividade da fauna no solo. Este trabalho teve por objetivo estudar os efeitos da aplicacao de dejetos de suinos em areas de pastagem sobre a biota do solo. Foi analisada a composicao e a atividade biologica de areas com uso de dejetos ha 2 anos (A2), ha 14 anos (A14) e mata nativa (MN), como area referencia. O uso sucessivo de dejetos de suinos no solo alterou as caracteristicas biologicas do solo, de acordo com o seu tempo de aplicacao; influenciou a composicao e a diversidade da fauna edafica, aumentando o numero total de individuos, principalmente de colembolos, e aumentou a atividade da biota do solo, especialmente ate os 6 cm de profundidade. Palavras-chave: adubacao organica, fauna edafica, lamina bait.
ISSN:0103-8478
1678-4596
DOI:10.1590/0103-8478cr20141869