Using canola plants for phytoextracting heavy metals from soils irrigated with polluted drainage water for a long term
2009
Zein, F.I. | El-Sanafawy,H. M.A. | Tolha, N.I. | Salama, S.A.
The obtained results showed that: Using poor water quality for irrigation increased ECe, SAR, soluble cations and anions in soil paste extract and total DTPA extractable heavy metals in soils (Mn, Zn, Cu, Ni, Cd and Pb) than that of mixed or good water quality. No significant effect of water treatment was found on plumule length swelling coefficient, hydration coefficient, crude fat, ash, relative density percent of canola seeds. The best main radical length and crude protein were obtained in seeds of canola plants irrigated with drainage water. Content of the studied heavy metals was in the following order: roots stems leaves seeds oils and greater when poor water quality (W3) was used for irrigation water. Highly significant differences were found between means of heavy metal content in canola plant due to irrigation water treatment. Canola oils which extracted from seeds were the least content of studied heavy metals in canola plant organs. Canola behaved as an accumulator for heavy metals such as Zn, Mn, Cd, Ni and Pb and is useful for metal phytoextraction due to higher metal accumulation capacity.
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