The response of wild olive to the addition of a fulvic acid-rich amendment to soils polluted by trace elements (SW Spain)
2005
Murillo Carpio, José Manuel | Madejón, Engracia | Madejón, Paula | Cabrera, Francisco | Junta de Andalucía
20 pages, 5 figures, 4 tables, 48 references. We thank Pilar Burgos, Patricia Puente ‘Patri’ and José María Alegre for their help at different stages of this study. Trace element concentrations in plants were determined by Dra. Olga Cazalla in the Centre for Scientific Instrumentation, University of Granada. Authors thank to M. Connolly for the English revision of the MS.
显示更多 [+] 显示较少 [-]We studied the response of wild olive (Olea europaea L. var. Sylvestris Brot.), a representative species of the Mediterranean forests, to a fulvic acid-rich amendment added to soils polluted by trace elements under semi-arid conditions. Fulvic acids are known to increase the availability of minor elements; however, phytotoxic effects might arise if the mobilization of potentially toxic trace elements was excessive. The amendment caused some mobilization of As under laboratory conditions. However, ‘in situ’, phytotoxic concentrations of As in the plants were never registered. The concentrations of Cd, Cu, Pb, Tl and Zn were not phytotoxiceither and were generally within the ranges considered normal for plants. The positive effects on plant growth and on the nitrogen and chlorophyll content derived from the amendment application seem to corroborate the absence of phytotoxicity.
显示更多 [+] 显示较少 [-]This study was supported by the PICOVER program of the Regional Ministry of Environment, Sevilla, Spain.
显示更多 [+] 显示较少 [-]Peer reviewed
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