Chemical composition of soil solution under eucalyptus plantation in Southern Brazil

Abstract

This study focuses on changes in the chemical composition of solutions during their transfer in the soil cultivated with hybrid of Eucalyptus urophylla x Eucalyptus globulus stand in southern Brazil. The chemical composition of soil solution was evaluated from January to December 2010, when the plant was from 8.5 to 9.5 years-old. Ceramic lysimeters were installed in order to measure the chemical composition of the soil solution in two different depths (30 and 80 cm) with six repetitions. The lysimeters were connected to a vacuum pump, where in each four hours, during ten minutes, the solution was suctioned. The soil solutions were collected in glass bottles with 0.5 liters of capacity. Fortnightly the samples were collected and each replicate of soil solution was analyzed separately. The solutions were filtered (0.45 μm) and the nutrients concentrations were measured. . Essa mudança na composição química da solução do solo indica que ocorrem diferentes padrões de absorção de nutrientes pelas raízes das plantas.Palavras -chave: Nutrição florestal; Relação água-planta; Disponibilidade de nutrientes.1 Recebido em 30.08.2014 e aceito para publicação como artigo científico em: 02.12.2014.