Nickel and lead uptake by willows (salix viminalis l.)
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Date
2012
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Publisher
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy w Puławach
Abstract
Description
Phytoextraction of heavy metals by willow can be
a promising technology for remediation of low- and mediumcontaminated
soil. Willows are especially effective in taking up
Cd and Pb from soil and in transporting them to the aboveground
parts of plant. Salix is characterized by high capacity for biomass
production. Willow cultivated on a soil contaminated with heavy
metals produces 13–17 Mg?ha-1 dry mass of wood per year. The
study presents the influence of municipal sewage sludge on the
content of Ni and Pb in leaves, bark and wood. The main aim of
the experiment was to select a clone that accumulates the highest
amount of Ni and Pb in the leaves, bark and wood. The research
with the seedlings of willow was established in 2003 and with
sewage sludge in 2008–2010 in Experimental Station in Wrocław
(Pawłowice). The experiment was established using split-plot design
with two changeable factors in three replications: the first
factor was related to various doses of sewage sludge: 75 and
150 Mg?ha-1 fresh mass (14.3 Mg?ha-1 and 28.6 Mg?ha-1 dry mass)
and the second factor was four selected clones of willow (Salix
viminalis L). Analysis of variance showed significant influence of
various doses of sewage sludge and genetic properties of clones
on the content of nickel and lead in plant material. The greatest
amount of heavy metals was determined in the leaves, less in the
bark and the least in the wood.
Keywords
clones, heavy metals, lead, nickel, sewage sludge, willow
Citation
Polish Journal of Agronomy
2012, 11, 29–33