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Pouvoir fixateur vis-à-vis des ions phosphate de sols tropicaux à argile 1:1
| Content Provider | Semantic Scholar |
|---|---|
| Author | Frossard, Emmanuel Brossard, Michel Feller, Christian Rouiller, James |
| Copyright Year | 1992 |
| Abstract | This study was aimed to clarify the influence of secondary mineral constituents (iron and aluminium oxides, kaolinite) and organic matter on the determination of the phosphate-fixing capacity (PFIX) of well-drained low-activity clay soils. This study was done on soil samples (0–2 mm) and on their particle size fractions. The phosphate-fixing capacity, estimated by an isotopic exchange method, was highly related to the total iron content of the soils. The phosphate-fixing capacity of the particle size fractions was related to their mineralogical composition, and to the organisation of their constituents. H2O2 strongly increased the phosphate-fixing capacity of the soils and of their particle size fractions. Two hypotheses were proposed to explain this. Either H2O2 caused the formation in vitro of amorphous constituents with a high phosphate fixing capacity; or the destruction of organic matter by H2O2 caused the apparition of new surfaces previously masked by organo-mineral aggregation and/or caused the ap... |
| Starting Page | 135 |
| Ending Page | 143 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.4141/cjss92-013 |
| Volume Number | 72 |
| Alternate Webpage(s) | http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_31-32/36179.pdf |
| Alternate Webpage(s) | https://doi.org/10.4141/cjss92-013 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
