Effect of long-term application of phosphorus fertilizers on uranium contamination [of] Serbian soils
2006
Stojanovic, M.,Institut za tehnologiju nuklearnih i drugih mineralnih sirovina, Beograd (Serbia) | Babic, M.,Institut za tehnologiju nuklearnih i drugih mineralnih sirovina, Beograd (Serbia) | Stevanovic, D.,Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Martinovic, Lj.,Institut za zemljiste, Beograd (Serbia)
Use of phosphoric fertilizer is the main anthropogenic source of the uranium spreadout in the environment (about 73% of the total spreaded uranium). The investigations performed in this work should explain their influence on the uranium contamination of soils and plants grown on these soils. These investigations include: determination of correlative relations between the contents of uranium and phosphorus, uranium and humus, uranium and pH value of pseudogley soil, alluvium and chernozem in the region of Sumadija, i.e. in chernozem of the Backi Petrovac, determination of statistically significant differences in the contents of uranium in control parcels (not fertilized for more than 30 years) and parcels fertilized by phosphoric fertilizers. The investigations were performed with three soil type (chernozem - pseudogley - Varna and vertisol - Kragujevac) and four plant species (corn, wheat, sugar cane and sunflower). In all cases, the content of uranium in soils, with or withour fertilizing, was on the level with the natural content that is in the range of 0.08-5.9 ppm for Serbia. Use of phosphoric fertilizers did not lead to an increase the differences in the content of accessible uranium forms, since the differeces between the plants grown in fertilized soil and those grown on unfertilized one were statistically insignificant. In all investigated plant species, uranium accumulation was the highest in root and the lowest, below the detection limit, was in reproductive organs.
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