Abstract
The tillage systems induce changes in soil structure; modify the porous space, and influence soil water and air dynamics. In this sense, it is important to evaluate these impacts on soil physical quality according to different tillage system with distinct years of implementation. The physical properties of a Oxisol at the Brazilian Cerrado with distinct tillage conditions (conventional, no-till, and a native Cerrado) with different years were compared. The study was conducted at Novo Horizonte farm, at the Cerrado region of southwest Piauí. Soil samples were collected at 0.0-0.10, 0.10-0.20 and 0.20-0.30 m depth in different management systems: no-till with three and five years of implantation (NT3 and NT5, respectively); conventional till with five and nine years (CC5 and CC9, respectively); and a native cerrado area. Were analyzed the aggregate stability in water, soil bulk density, particle density, macro and microporosity, total porosity and total organic carbon. The years of implementation of the tillage systems caused changes in the soil physical properties, which were more evident in the surface layer. Although improved soil physical attributes were observed in no-till after five years of implantation, a longer evaluation time is required for the studied conditions.
Highlights
The Brazilian Cerrado is being highlighted in the agricultural scenario due to the significant increase in grains and fibers cultivation area
The lower bulk density (Bd) recorded at NT5 (1.36 Mg m-3), compared to other sites, may be related to the higher clay content (Table 2)
Changes in the soil physical properties, which were more evident in the surface layer, were due to the time of the tillage systems implementation
Summary
The Brazilian Cerrado is being highlighted in the agricultural scenario due to the significant increase in grains and fibers cultivation area. The tillage practices induce changes in soil physical properties affecting the plant development and, decreasing the productivity. The impacts can be summarized as changes in the macroporosity (Carneiro et al, 2009; Wendling et al, 2012); aggregates stability (Fontenele et al, 2009; Santos et al, 2012; Servadio et al, 2016); organic matter content (Pragana et al, 2012; Santos et al, 2012); soil-water infiltration, aeration and permeability (Fontana et al, 2016; Farias et al, 2017). The conventional tillage practices increase macroporosity (Silva et al, 2009), and induces subsurface compaction. Plowing affects soil structure breaking the connection between aggregates (Bavoso et al, 2010), contributing to organic matter oxidation (Rossetti & Centurion, 2015)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
