Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. VIII
Written by Violina ANGELOVA, Zhivko TODOROV
A comparative research regarding the impact of organic amendments on the uptake of heavy metals within Oriental tobacco Krumovgrad 90 has been carried out. Experiments have been implemented in controlled conditions. The soil used in this experiment was sampled from the vicinity of KCM – Plovdiv. The pot experiment was a randomized complete block design containing five treatments and three replications (15 pots). The treatments consisted of a control (no organic ameliorants) and compost, and vermicompost amendments (added at 2.5% and 5%, recalculated based on dry soil weight). Heavy metals were measured in roots, stems and leaves of tobacco. The photosynthetic and transpiration rates were measured during treatment using an LCA-4 portable photosynthesis system. Amendments favour the growth and development of tobacco and increased photosynthesis and transpiration intensity. Amendments dose not lead to effective immobilization of Cd, Zn and Cu phytoaccessible forms in soil. The effect of the amendments used for the reduction of the Cd and Zn content in tobacco is negligible. The use of vermicompost can result in a reduction of Pb content in tobacco leaves to 30-40%.
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