Atributos físicos, químicos e morfológicos do solo sob sistema agroflorestal em Corrente - PI

Abstract

Knowledge of soil characteristics allows the development of appropriate managemet practices.The objective of this study was to carry out the chemical,physical and morphological characterization of a soil under an agroforestry system and provide support for environmental planning and use of the studied land.The research was deloped in the area of implementation of the agroforestry system at the Institute Federal of Piauí- Campus Corrente. In an open in the area where the agroforestry system was implemented, the soil profile was described through morphological analysis and soil collection to determine physical and chemical parameters.The profile studied apresented a sequence of horizons A1- A2- B1- B2. The calor was characterized as yellow-red, which may be related to the presence of iron oxides and hydroxides of iron.The structure is predominantly a small to medium angular block with a strong dregee of development,which demonstrates greater resistance and erosivity,relating it to consistency. It has a texture varying from clayey to very clayey and a low silt/clay ratio, which demonstrates the high degree of soil weathering. The density was within the critical limits established for clayey soils. Organic matter contents were higher in surface horizons. The soil acidic although it has hingh base saturation, which may be related to the presence of A1 and Fe pxides predominant in Cerrado soil. It is concluded that the implementation time of the agroforestry system was not enough to promote improvements in soil attributes