Growth responses of crop and weed species to heavy metals in pot and field experiments.

Environmental Science and Pollution Research International
K FarragG Brunetti

Abstract

Greenhouse and field studies were performed to examine the growth responses and possible phytoremediation capacity towards heavy metals of several Brassicaceae (Brassica alba, Brassica carinata, Brassica napus and Brassica nigra) and Poaceae (durum wheat and barley). Soils used featured total concentrations of Cr, Cu, Pb and Zn largely exceeding the maximum levels permitted by the Italian laws. Different organic amendments were tested such as a compost and the plant growth-promoting rhizobacterium Bacillus licheniformis. In the greenhouse experiment, plant length, leaf area index and shoots dry matter were evaluated periodically for the Brassicaceae examined. Whereas plant length, grains production, weight of 1,000 seeds, ear fertility and tiller density were determined under field conditions at the end of the crop cycle for wheat and barley. In general, the species tested appeared to be tolerant to high heavy metal concentrations in soil, and slightly significant differences were found for all parameters considered. A marked growth increase was shown to occur for Brassicaceae cultivated on compost- and bacillus-amended contaminated soils, with respect to non-amended contaminated soils. With some exception, higher growth parame...Continue Reading

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Citations

Jul 4, 2013·Environmental Science and Pollution Research International·Aurora NeagoeVirgil Iordache
Nov 12, 2014·TheScientificWorldJournal·Luís A B Novo, Luís González
Mar 31, 2015·Water, Air, and Soil Pollution·Dorota Adamczyk-SzabelaWojciech M Wolf

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