Abstract

BARBOSA BRITO, Cleiton Fernando et al. Physical and biological changes of a eutrustox (latosol) under no-till and conventional tillage in the brazilian semi-arid. Cienc. suelo [online]. 2018, vol.36, n.2, pp.148-155. ISSN 1850-2067.

The sustainability of no-till and conventional tillage systems in semi-arid regions should assess soil property changes over time. In this way, the objective was to evaluate the changes in the physical and biological attributes of a Typic Eutrustox (Latosol) under different uses (no-tillage, conventional tillage and native forest) in the semi-arid region. The experiment was carried out in 18 x 18 m plots under no-till system (NT), conventional tillage (CT) and native forest (NF). Particle density, bulk density, porosity, penetration resistance, microbial respiration and soil organic carbon were determined at 0.00-0.05; 0.05-0.10; 0.10-0.20 and 0.20-0.40 m depths. The NT and CT changed soil physical properties of the surface layer, compared with NF, besides soil compaction increased in the arable layer (0.00-0.20 m) of CT. Soil under NF had superior biological properties compared to NT and CT in all evaluated depths. NT is the closest tillage compared to the NF conditions, regarding biological quality, represented by microbial soil respiration. After nine years of NT and CT, a continuous organic matter input is essential to maintain NT advantages over CT in the semi-arid conditions.

Keywords : No-tillage; soil management; sustainability.

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