African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Special liming materials for acidity control of soils with variable charge

Jessica Alves dos Santos
  • Jessica Alves dos Santos
  • State University of Ponta Grossa, Av. Carlos Cavalcanti, Ponta Grossa, Paraná, Brazil.
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Adriel Ferreira da Fonseca
  • Adriel Ferreira da Fonseca
  • State University of Ponta Grossa, Av. Carlos Cavalcanti, Ponta Grossa, Paraná, Brazil.
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Domenico Zocco
  • Domenico Zocco
  • Omya International AG, P. O. Box 335, Baslerstrasse 42, 4665 Oftringen, Switzerland.
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Igor Vieira
  • Igor Vieira
  • Omya do Brasil Ltda, Av. Angélica, 2220, 2° andar, São Paulo, São Paulo, Brazil.
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  •  Received: 13 April 2016
  •  Accepted: 08 July 2016
  •  Published: 04 August 2016

Abstract

Soil acidity has been the major limiting factor to farming activities in the tropics and subtropics. The objective of this study was to verify the efficacy of special liming materials, when compared with the dolomitic limestone, regarding the correction of soil acidity with variable charge in controlled conditions. Samples of a Typic Dystrudept and Rhodic Hapludox were collected from a of layer 0-20 cm, and used to carry out two experiments in a completely randomized design of 4 x 4 x 8 factorial design. Four liming materials were studied: dolomitic limestone (DL), granulated micronized calcite (GMC), granulated micronized dolomite (GMD) and carbonated suspension (CS). After they have been characterized, each liming material was added to the soils using doses that aimed to increase the base saturation (V) to 50, 70 and 90% and a control treatment was included. The treated soil samples were incubated at 23 ± 2°C and 60% soil water retention capacity for eight periods (0, 7, 15, 30, 45, 60, 75 and 90 days). The attributes active (pH), potential (H+Al) and exchangeable (Al3+) acidity and V were evaluated. The special liming materials GMC and CS were efficient enough to reduce the active potential and exchangeable acidity, and increase V in soils with variable charge.

     

Key words: Micronized liming materials, carbonated suspension, soil reaction, Inceptisol, Oxisol.