Accumulation of Cadmium in Arid Soils as Affected by Intensive Phosphorus Fertilization
| Autor: | A. E. Abdallah, A. S. Modaihsh, M. O. Mahjoub |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Arid Land Research and Management. 15:173-181 |
| ISSN: | 1532-4990 1532-4982 |
| DOI: | 10.1080/15324980151062841 |
| Popis: | Amounts of P-fertilizers annually added to crops grown on soils of Saudi Arabia are enormously increased. The environmental hazards of these fertilizers worldwide, however, have become of great concern. As these fertilizers might bear rich content of detrimental elements typically like cadmium, that element's levels in the used P-fertilizers and soil were pursued. Eleven wheat farms situated in Al-Kharj district were chosen to carry out this study. These farms represented a comparatively short period of cultivation (less than 10 years) and a long one (more than 10 years). Soil samples representing three depths, 0-15, 15-30, and 30-40 cm, were taken from inside the central pivots and from its outer uncultivated sphere. The changes of soil total and extractable P and total Cd were measured and the effect of P fertilization on the buildup of soil P and Cd was estimated. The results obtained revealed that buildup in P status of soil has occurred. P was accumulated in the surface soil layer due to higher P app... |
| Databáze: | OpenAIRE |
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