MICROMORFOLOGIA E FUNÇÕES HIDRÁULICO-ENERGÉTICAS NA ANÁLISE ESTRUTURAL DO SOLO SOB SISTEMA INTEGRADO DE PRODUÇÃO AGROPECUÁRIA

Abstract

The application of the alternative techniques for the soil structure parameters analysis has been used more increasingly. The analysis of the 2D and 3D images is an alternative in this qualitative process, can be associated with the traditional techniques as the micromorphology and the soil physical quality (SPQ) indices. The aim of this work was evaluating the porous system of a Haplohumox under integrate crop-livestok system (ICLS). This experiment was carried out in bands with treatment of subdivided plots. These bands presented an area of 1200 m² (120 × 10 m) and the sub-plots 100 m² (10 × 10 m). The bands were under different management systems: conventional tillage (CT), minimum tillage (MT), no-tillage (NT) and chiseled no-tillage (CNT), taking into consideration the annual ryegrass (Lollium multiforum Lam) use was cropped as follows: cover crop (C), grazing (G) and silage (S) during the winter. It has been collected blocks samples to realize resin impregnation with fluorescent pigment, for micromorphological observations. Undisturbed soil samples were collected in stainless steel volumetric rings to assess the partial water retention curve (SWRC) and analysis of others physical and soil structure parameters. This work joined the micromorphology analysis technique by 2D images, with the application of SPQ indices and hydraulic-energetics functions to obtain results more accurate in terms of possible modifications occurred in the soil structure. It was observed that both obtained related results in a satisfactory way.