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      Nitrate leaching from a Latosol after application of liquid swine manures in different pH values and organic matter contents Translated title: Lixiviação de nitrato em Latossolo após aplicação de dejetos líquidos de suínos com diferentes valores de pH e teores de matéria orgânica

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          Abstract

          Liquid swine manures are produced in large volumes in the western Paraná and Santa Catarina states and are reused as a source of nutrients. This study aimed to evaluate the losses of nitrate (N-NO3-1) after application of liquid swine manures in three samples of a Latosol (Rhodic Eutrudox) with different levels of soil organic matter and pH collected at different depths. The experimental design was completely randomized with one soil, three levels of soil organic matter (34.09, 22.36 and 8.6 g dm-3), four pH in CaCl2 (4.0, 5.0, 6.0 and 7.0) conditions and three replications. Each experimental unit contained 450 cm³ of soil that received a dose of liquid swine manures equivalent to 120,000 dm-3 ha-1. The concentration of N-NO3-1 was evaluated in the leaching solution after the weekly application of water equivalent to 150 mm for a period of 35 days. The amount of N-NO3-1 leached increased with soil organic matter content and soil pH. The amount of nitrate leached tends to be maximum at pH close to or above 7.0.

          Translated abstract

          Dejetos líquidos de suínos são produzidos em grandes volumes no oeste dos Estados do Paraná e Santa Catarina e reutilizados como fonte de nutrientes. Este trabalho teve por objetivo avaliar as perdas de N-NO3-1 após aplicação de dejetos líquidos de suínos em três amostras de um Latossolo Vermelho eutroférrico com diferentes teores de matéria orgânica e valores de pH, coletadas em diferentes profundidades. O delineamento experimental utilizado foi o completamento casualizado com um solo, três teores de matéria orgânica (34,09; 22,36 e 8,6 g dm-3), quatro níveis de pH em CaCl2 (4,0; 5,0; 6,0 e 7,0) e três repetições. Cada unidade experimental continha 450 cm³ de solo que recebeu uma dose de DLS equivalente a 120.000 dm-3 ha-1. Avaliou-se a concentração de nitrato (N-NO3-1) na solução lixiviada após a aplicação, semanalmente, de uma lâmina de água equivalente a precipitação de 150 mm, por um período de 35 dias. As quantidades de N-NO3-1 lixiviadas aumentaram com o teor de matéria orgânica e com o pH do solo. A quantidade de nitrato lixiviado tende ser máxima em valores de pH próximos ou acima de 7,0.

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          Most cited references 30

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          Sistema brasileiro de classificação do solo

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            The chemistry of soils

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                asagr
                Acta Scientiarum. Agronomy
                Acta Sci., Agron.
                Editora da Universidade Estadual de Maringá - EDUEM (Maringá )
                1807-8621
                December 2010
                : 32
                : 4
                : 743-748
                Affiliations
                [1 ] Universidade Estadual de Maringá Brazil
                [2 ] Universidade Estadual do Oeste do Paraná Brazil
                Article
                S1807-86212010000400025
                10.4025/actasciagron.v32i4.10070
                Product
                Product Information: website
                Categories
                AGRONOMY

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