Comparison between Mehlich-1 and Bray-1 extractors and iron oxide collector for phosphorus availability in soil
Abstract
The efficiency of methods Mehlich-1, Bray-1 and phosphorus collector to extract phosphorus from soils was tested. Samples of three soils, Dystric Nitosols; Rhodic Fenasols; Ferric Acresol and maize (Zea mays L.) as test plant were used in a greenhouse. Soils received two doses (9.50 and 4.75 g kg-1) of 5 organic fertilizers: 1 - sewage sludge from Curitiba - PR; 2 - sewage sludge from Maringá - PR, both limed at 30%; 3 - sewage sludge from Curitiba - PR, limed at 50%; 4 - chicken manure; 5 - bovine manure. The experiment had a control treatment test. Plants and soil samples were collected after 40 days of sowing. While phosphorus availability in the collected soils was evaluated by extractors Mehlich-1, Bray-1 and the phosphorus collector method (disks of synthetic fabric covered by iron oxide), phosphorus concentration in plants and soil solutions were determined by the classical spectrophotometric UV-Vis method. A variance analysis of results showed that the three methods predict the phosphorus absorbed by the corn plants. Bray-1 method presented less interference with the treatments and the clay content of soils.Downloads
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Published
2008-05-13
How to Cite
Palacio, S. M., Luchese, E. B., & Lenzi, E. (2008). Comparison between Mehlich-1 and Bray-1 extractors and iron oxide collector for phosphorus availability in soil. Acta Scientiarum. Technology, 22, 1151-1156. https://doi.org/10.4025/actascitechnol.v22i0.3001
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Section
Chemistry
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2019CiteScore
36th percentile
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