Qualidade física do solo sob diferentes sistemas de manejo e aplicação de dejeto líquido suíno

Abstract

R E S U M OA aplicação em solos agrícolas tem sido a principal alternativa para destinar o grande volume de dejetos líquidos suínos (DLS) gerados nos ambientes de produção. O objetivo deste trabalho foi avaliar possíveis modificações nos atributos físicos do solo decorrentes do sistema de manejo e aplicação de DLS. O estudo foi desenvolvido no município de Arapoti, PR, em agosto de 2012. Foram amostradas cinco áreas: floresta nativa, pastagem com adubação química e aplicação de DLS, plantio convencional com adubação química e aplicação de DLS, plantio direto com adubação química, plantio direto com adubação química e aplicação de DLS. Os atributos físicos do solo avaliados foram: densidade do solo (Ds), porosidade total (Pt), macroporosidade (Ma), razão macro e microporosidade (Ma/ Mi) e resistência à penetração (RP). A adoção dos diferentes sistemas de manejo agrícola alterou a qualidade física do solo elevando a Ds e a RP e reduzindo o volume de poros. O solo manejado sob pastagem apresentou os maiores valores de RP. Não foram constatadas alterações nos atributos físicos do solo pela aplicação de DLS nos diferentes sistemas de manejo avaliados. Physical quality of soil under different systems of tillage and application of pig slurry A B S T R A C TThe application in agriculture has been the main alternative to allocate the large volume of pig slurry (PS) generated in production environments. The aim of this study was to assess possible changes in physical properties of soil resulting from the management system and PS application. Five areas were sampled: native forest, pasture with mineral fertilizer and PS application, conventional tillage with mineral fertilizer and PS application, no-tillage with mineral fertilizer, no-tillage with mineral fertilizer and PS application. The evaluated physical properties of soil were: bulk density (Bd), total porosity (Pt), macroporosity (Ma), macro and microporosity ratio (Ma/Mi) and penetration resistance (PR). The adoption of different agricultural management systems altered the physical conditions of the soil, increasing the Bd and the PR and reducing the pore volume. The soil managed under pasture showed the highest values of PR. No changes were found in physical properties of soil by the application of PS in evaluated tillage systems. Palavras-chave:compactação do solo resíduos agrícolas resistência à penetração

Corn Fertilization Using Swine Wastewater and Soil-Water Environmental Quality

“…Among them, there are effects on agricultural crops (Berenger et al, 2008;Kessler et al, 2013a;Kessler et al, 2013b;Gómez-Garrido et al, 2014;Passarin et al, 2016), soil chemical , physical (Oliveira et al, 2015), and biological characteristics (Tessaro et al, 2013;Brooks et al, 2014;Castaldelli et al, 2015;Moura et al, 2016). Besides, there is the leaching (Prior et al, 2009; Corn fertilization using swine wastewater and soil-water environmental quality Eng.…”

Changes in physical properties and organic carbon of a Kandiudox fertilized with manure

“…BARBOSA et al (2015) evaluated aggregation in a Latosol after PS and PL application and observed an increase in aggregates of <0.250mm, between 30 and 60 days after fertilization, in the 0-10cm layer. Assessing changes in physical properties of a Latosol, Oliveira et al (2015) reported no changes after PS application in different soil management systems in the long term, but the land use systems adopted increased bulk density and penetration resistance and reduced the pore volume.…”

Oxisol physical quality with application of landfill leachate

“…Oliveira et al (2015) observed that the applications of organic material, by means of swine manure, did not influence the soil structure and Barbosa et al (2015) observed in experiment of eight years duration in a Red Latosol (Oxisol), that the aviary manure improves the soil structure in the first 15 days after the application. As for the LL, the information is commonly directed to the works that evaluate the phyto-extraction of heavy metals through the development of plants and processes of sorption and desorption in clays, in areas of landfill, already infected, as in Coelho et al (2016), Salam et al (2016) and Rong et al (2017).…”