Aproveitamento de água residuária de suinocultura na nutrição de corymbia citriodora

Abstract

Pig confinement stands out as a large swine wastewater generator (ARS). The final destination of generated waste is currently a concern of the society, since, if handled improperly, can cause serious impacts to the environment. One of the alternatives is the use of ARS as a source of nutrients, which after the mineralization of organic matter, are made available to the plants. The objective of this work was to compare soil chemical attributes under two planting arrangements, in single and double lines of Corymbia citriodora. Two experiments were carried out at the Bonsucesso farm, in Uberlândia - MG, the first with citriodora in simple lines, with five plants per plot, spacing two meters between plants and 15 meters between rows. The second experiment was with citriodora in double lines, with two meters between plants in the line, three meters between lines in the plot and 15 meters between the double lines of citriodora. The statistical design was in randomized blocks. The treatments used were five doses of ARS (0; 200; 400; 600 and 800 m³ ha-1) with five replicates. The application of ARS rates were divided in the dry season, in June, July and August. The chemical characteristics of the soil were evaluated in the 0-60 cm depth layer and leaf samples were collected from all plots. The application of ARS in the simple line of citriodora, resulted in the increase of the leaf content of N and Zn. The application of ARS in the double line of citriodora resulted in the increase of the leaf content of N, K, Cu, Mn and Zn. For leaf contents of Zn in single line and of K and Zn in double line, there was a very strong correlation compared with the soil contents.