Alterações estruturais do solo fertirrigado com água residuária de suinocultura sob diferentes usos e ocupações

Abstract

The hog raising is an activity that generates a big amount of waste that after receiving proper treatment are still rich in nutrients and can be used in agriculture. However, the use of these water application amounts must respect the extraction capacity of the cultures and the nutrient availability in the soil to not occur any changes in soil structure and / or happen contamination of water sources. The aim of this work was to evaluate the changes of physical water relations of the ground, which are generated by fertigation with hog raising wastewater, as well as the effects of vegetation on these relations. Samples of the three scenarios were collected in a yellow oxisol of clay loam texture in the depth of 0 -20 and 20-40. It was determined the Saturated Hydraulic Conductivity values (K0), total porosity, absolute density, particle density, macro and micro porosity, electrical conductivity of effluent (CEa), electrical conductivity of the saturated soil extract (CEe) Adsorption Relationship of Sodium (RAS) and speed of basic soil infiltration (VIB). It was observed in this study that the agricultural exploitation caused an accelerated degradation of soil regardless of soil receives the effluent and the vegetation cover shown of great importance in the structure and soil conservation.