<b>Mineralogy and phosphorus adsorption in soils of south and central-west Brazil under conventional and no-tillage systems

  • Jessé Rodrigo Fink Universidade Federal do Rio Grande do Sul
  • Alberto Vasconcellos Inda Universidade Federal do Rio Grande do Sul
  • Cimélio Bayer Universidade Federal do Rio Grande do Sul
  • José Torrent Universidade de Córdoba
  • Vidal Barrón Universidade de Córdoba

Resumo

The low phosphorus availability in tropical and subtropical soils, normally related to adsorption of phosphate to the minerals surfaces, can be attenuated when organic matter (OM) accumulates in the soils. Herein, we report the results of long-term experiments (18–32 years) aimed at quantifying the maximum phosphorus adsorption capacity (MPAC) and its determinant mineralogical variables in Brazilian soils and at assessing the effect of no-tillage (NT) in mitigating the phosphorus adsorption of soils. The MPAC of soils ranged from 297 to 4,561 mg kg-1 in the 0.00–0.10 m layer and from 285 to 4,961 mg kg-1 in the 0.10–0.20 m layer. The MPAC was correlated with the concentrations of iron oxides, goethite and ferrihydrite, gibbsite/(gibbsite+kaolinite) ratio and the specific surface area. The OM increased in the 0.00–0.10 m layer of NT soils, which was not reflected on the decrease of MPAC for the no-tillage soils.



 

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Biografia do Autor

Alberto Vasconcellos Inda, Universidade Federal do Rio Grande do Sul

Departamento de Solos

Pedologia e Uso do Solo

Cimélio Bayer, Universidade Federal do Rio Grande do Sul

Departamento de Solos

Manejo do Solo

Publicado
2014-02-19
Como Citar
Fink, J. R., Inda, A. V., Bayer, C., Torrent, J., & Barrón, V. (2014). <b&gt;Mineralogy and phosphorus adsorption in soils of south and central-west Brazil under conventional and no-tillage systems. Acta Scientiarum. Agronomy, 36(3), 379-387. https://doi.org/10.4025/actasciagron.v36i3.17937
Seção
Solos

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus