Enrichment of Tropical Peat with Micronutrients for Agricultural Applications: Evaluation of Adsorption and Desorption Processes

نویسندگان

  • Camila de A. Melo
  • Lilian K. de Oliveira
  • Danielle Goveia
  • André H. Rosa
چکیده

O objetivo deste trabalho foi avaliar os processos de adsorção e dessorção de micronutrientes em amostras de turfas tropicais visando uma possível aplicação em solos. Para isso, experimentos de adsorção foram estudados em diferentes valores de pH e a partir de solução metálica multielementar e elementar. As capacidades de adsorção máximas ocorreram em pH 6,0 e a ordem de afinidade observada em geral foi: Cu > Fe > Co > Ni > Zn = Mn. A liberação dos micronutrientes foi avaliada sob diferentes valores de pH em meio aquoso, e posteriormente, em solo e planta. Os experimentos de liberação mostraram que os micronutrientes são liberados preferencialmente em pH 6,0 e na seguinte ordem: Fe > Zn > Mn > Co = Ni > Cu. A liberação dos micronutrientes para o solo é acompanhada pela sorção dos mesmos pela planta. Desta maneira, a aplicação de turfas tropicais enriquecidas com micronutrientes pode contribuir para uma maior produtividade agrícola uma vez que a liberação dos micronutrientes mostrou-se eficiente no desenvolvimento das plantas.

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تاریخ انتشار 2013