SciELO - Scientific Electronic Library Online

 
vol.28 número3Atributos químicos e produção de milho em um latossolo vermelho eutroférrico tratado com lodo de esgoto índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Revista Brasileira de Ciência do Solo

versão impressa ISSN 0100-0683

Resumo

ABREU, C. A.; VAN RAIJ, B.; ABREU, M. F.  e  PAZ GONZALEZ, A.. Evaluation of manganese and iron availability in soils by a modified ion exchange resin method. Rev. Bras. Ciênc. Solo [online]. 2004, vol.28, n.3, pp. 579-584. ISSN 0100-0683.  http://dx.doi.org/10.1590/S0100-06832004000300018.

The objective of this research was to evaluate a modified ion exchange resin method for Mn and Fe extraction from soils. Forty-four soil samples presenting low, medium, and high Mn and medium to high Fe concentrations were used. Maize and soybeans plants were grown as test plants in a pot experiment in a greenhouse. Soil samples were analyzed for Mn and Fe using the modified ion exchange resin, DTPA, AB-DTPA, Mehlich-1, and Mehlich-3 methods. The correlation coefficients between soil Mn and Mn accumulated in the soybean shoot were: ion exchange resin (0.62*), DTPA (0.57*), Mehlich-3 (0.54*), Mehlich-1 (0.51*), and AB-DTPA (0.26). For maize, significant correlation coefficients between soil Mn and plant-Mn were obtained only when low-initial Mn soil samples were considered for all extractants, except for AB-DTPA. For soybeans, the modified ion exchange resin method was as efficient as DTPA, Mehlich-1 and Mehlich-3 for the evaluation of soil Mn availability. None of the methods was efficient for evaluating the soil Fe availability for the 53 day-old maize and soybean plants grown in greenhouse.

Palavras-chave : soil test; extractants; DTPA; AB-DTPA; Mehlich-1; Mehlich-3.

        · resumo em Português     · texto em Português     · pdf em Português