Use of gypsum residues as a corrective for saline-sodic soil

Authors

  • Paulo Medeiros dos Santos Instituto Federal de Educação, Ciência e Tecnologia do Maranhão (IFMA), Departamento de Ciências Agrárias, São Luís, MA, Brasil.
  • Mario Monteiro Rolim Universidade Federal Rural de Pernambuco (UFRPE), Departamento de Engenharia Agrícola, Recife, PE, Brasil.
  • Anamaria Sousa Duarte Universidade Federal Rural de Pernambuco (UFRPE), Departamento de Engenharia Agrícola, Recife, PE, Brasil.
  • Maria de Fátima Cavalcanti Barros Universidade Federal Rural de Pernambuco (UFRPE), Departamento de Agronomia, Recife, PE, Brasil.
  • Ênio Farias de França e Silva Universidade Federal Rural de Pernambuco (UFRPE), Departamento de Engenharia Agrícola, Recife, PE, Brasil.

Keywords:

Recycling, sodicity, sodium adsorption ratio.

Abstract

One of the hugest problems faced by the civil construction sector is the final destination of residues, especially gypsum, which presents recycling restrictions. However, these residues present a high amount of calcium in their composition, and can be alternatively used for replacing mined gypsum as a saline-sodic soil corrective. This study aimed at evaluating the efficiency of gypsum residues from the civil construction, when compared to mined gypsum, for correcting a saline-sodic soil. A randomized blocks design was used, in a factorial arrangement consisting of two kinds of corrective (gypsum residue and mined gypsum) and five leaching depths (0.5, 1.0, 1.5, 2.0 and 2.5 times the soil pores volume), with three replications. Electric conductivity, soluble cations and sodium adsorption ratio were evaluated in the soil saturation extract. The use of gypsum residue proved to be effective in leaching salts and soluble sodium in saline-sodic soil, and can be recommended as a calcium source for recovering from sodicity.

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Published

2014-04-08

How to Cite

SANTOS, P. M. dos; ROLIM, M. M.; DUARTE, A. S.; BARROS, M. de F. C.; SILVA, Ênio F. de F. e. Use of gypsum residues as a corrective for saline-sodic soil. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 1, n. 1, p. 95–103, 2014. Disponível em: https://revistas.ufg.br/pat/article/view/27197. Acesso em: 17 jul. 2024.

Issue

v. 44, n. 1, Jan./Mar. 2014

Section

Soil Science

License

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