| Autor: |
Luís Reynaldo Feracciú Alleoni, Sheila Renata Santos, Rafael Silva Guedes, Antonio Rodrigues Fernandes, Marcos Yassuo Kamogawa, Marina Colzato |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Revista de Ciências Agrárias. 58:228-231 |
| ISSN: |
2177-8760 |
| DOI: |
10.4322/rca.1804 |
| Popis: |
Phosphorus (P) fractionation is a common tool used in studies on soil P dynamics. However, the P fraction extracted by sodium dithionite-citrate-bicarbonate (DCB), occluded in iron oxides (P-occluded), is difficult to quantify. This study presents an alternative and simpler method for the quantification of the P-occluded fraction extracted by DCB. Samples were collected from a clayey Oxisol at a depth of 0-0.2 m. The extraction method followed the procedure described by Zhang and Kovar and malachite green method was used for determination. The malachite green method produced satisfactory quantification results, and it revealed a pattern that represents extract P concentrations according to the absorbance level. The method is suitable for simple determinations of P occluded in extracts of DCB. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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