African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Use and management of pasture in the cerrado biome: Impacts on aggregation of an oxisol

Fabiano Bertolin
  • Fabiano Bertolin
  • University Anhanguera-Uniderp, Brazil.
  • Google Scholar
José Antonio Maior Bono
  • José Antonio Maior Bono
  • University Anhanguera-Uniderp, Brazil.
  • Google Scholar
Manuel Claudio Motta Macedo
  • Manuel Claudio Motta Macedo
  • University Anhanguera-Uniderp, Brazil.
  • Google Scholar
Alexandre Romeiro de Araújo
  • Alexandre Romeiro de Araújo
  • University Anhanguera-Uniderp, Brazil.
  • Google Scholar
Francisco de Assis Rolim Pereira
  • Francisco de Assis Rolim Pereira
  • University Anhanguera-Uniderp, Brazil.
  • Google Scholar


  •  Received: 23 June 2015
  •  Accepted: 17 March 2016
  •  Published: 16 June 2016

Abstract

The objective of this study was to evaluate the physical quality of a dystrophic Oxisol in the Cerrado biome, by means of its aggregation, after 19 years of use and management with pasture. The treatments were soil with natural vegetation (CERR); and soil with Brachiaria decumbens cultivar Basilisk pasture, under the following four types of management: soil with maintenance-level fertilization, every two years, and with legumes (PAML); soil with maintenance-level fertilization, every two years (PAM); soil with fertilization only at implantation (PAI); and soil with degraded pasture without fertilization (PD). In November 2012, after 19 years of land use in the treatments, soil samples were collected at four locations per plot, and at two depths, 0 to 10 and 10 to 20 cm. The study evaluated the size distribution of air-dried aggregates and the distribution of water-stable aggregates, determining the water-stable weighted mean diameters (WMDws), the efficiency ratio of aggregates (ERA) and organic matter content of soil. The management of grassland with fertilizer favors the formation of larger aggregates in the soil, as well as WMDsw, ERA and the content of organic matter, improving soil physical quality, both in the 0 to 10 cm and in the 10 to 20 cm layer. Impacts on soil aggregates caused by the removal of native vegetation can be improved with the use of soil under pasture and managed with fertilization in the 10 to 20 cm layer.

Key words: Soil physics, sustainability, organic matter.