A comparative study has been carried out on the effect of some soil amendments (phosphorus compounds, organic fertilizers and sapropel) on the quantity of the phytoaccessible forms of Pb, Zn and Cd and the accumulation of these elements by the Triticale. The effect of the used soil amendments on the mobile forms of the Pb, Zn and Cd is specific without clearly expressed tendencies. Only with the natural fertilizer there is a clear tendency for their reduction in all of the three studied elements. No direct relation between the quantity of the mobile forms and the absorption of Pb, Zn and Cd by the Triticale was established.
The superphosphate and KH2PO4 are effective phytostabilizing amendments for soils contaminated with lead. In combined contamination, however, adding superphosphate is not appropriate, as it increases the content of zinc and cadmium in the overground parts of the plants, while KH2PO4 can be used successfully.
The organic fertilizers are effective soil amendments for the soils, contaminated with Pb and Cd. Regarding the zinc, however, the results are not convincing enough, especially when natural fertilizer is used.
The sapropel presents a great interest for the purposes of phytostabilization. The evaluation of its potential, however, requires further studying of both the physical-mechanical and chemical characteristics, as well as its effect on a wider range of agricultural crops.
Angelova, Violina R.; Ivanov, Krasimir I.; and Krustev, Stefan V.
"Effect Of Phosphorous, Organic And Sapropel Amendments On Lead, Zinc And Cadmium Uptake By Triticale From Industrially Polluted Soils,"
Proceedings of the Annual International Conference on Soils, Sediments, Water and Energy: Vol. 13
, Article 20.
Available at: http://scholarworks.umass.edu/soilsproceedings/vol13/iss1/20