<b>Adsorption of P and forms of iron in no-tillage areas in the ‘Cerrado’ biome

  • Marcos Gervasio Pereira Universidade Federal Rural do Rio de Janeiro
  • Roni Fernandes Guareschi Universidade Federal Rural do Rio de Janeiro
  • Adriano Perin Instituto Federal Goiano
Palavras-chave: soil organic matter, pasture, iron oxides, oxisol

Resumo

The objective of this study was to evaluate the forms of iron extracted as sodium dithionite-citrate-bicarbonate (Fed), acid ammonium oxalate (Feo) and sodium pyrophosphate (Fep) and the relationship between these variables and the total organic carbon content and maximum adsorption capacity of P (MACP). The areas selected for this study had been using a no-tillage system (NTS) for varying periods of time: 3 years (NTS3), 15 years (NTS15) and 20 years (NTS20). These areas were compared with an area of native ‘Cerrado’ (CE) and a pasture area planted with Brachiaria decumbens (PA). The soil of the areas studied was classified as dystrophic oxisol. In each area, samples were collected at 0–5 cm and 5–10 cm. A correlation was observed between the C content and the different forms of Fe in the areas studied. There was a significant positive correlation between the carbon content and the forms of iron (Feo, Feo/Fed and Fep) and a negative correlation with the level of Fed. The areas of CE and PA had the highest MACP, which diminished as the amount of time of NTS use increased.

 

 

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Biografia do Autor

Marcos Gervasio Pereira, Universidade Federal Rural do Rio de Janeiro
UFRRJ - Professor do Depto de Solos
Roni Fernandes Guareschi, Universidade Federal Rural do Rio de Janeiro
UFRRJ - Aluno do Curso de Pós-Graduação em Agronomia - Ciência do Solo - Departamento de Solos
Publicado
2014-11-25
Como Citar
Pereira, M. G., Guareschi, R. F., & Perin, A. (2014). <b&gt;Adsorption of P and forms of iron in no-tillage areas in the ‘Cerrado’ biome. Acta Scientiarum. Agronomy, 37(1), 109-116. https://doi.org/10.4025/actasciagron.v37i1.17686
Seção
Solos

 

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