Inderscience Publishers

Induced phytoextraction: effect of amendment on phytoextraction of cadmium by poplar rooted cuttings ( Populus nigra L. and Populus alba L.)

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To determine the effect of amendments on cadmium uptake by one-year old poplar rooted cuttings, a pot experiment was carried out. Pots were filled with three substrates mentioned below: 1) loam soil, cocopeat and perlit were mixed in 1:0.5:0.5 (v/v/v) ratio; 2) loam soil and cocopeat were mixed in 1:1 (v/v) ratio (P50%); 3) loam soil. Four treatments of Cd supply including 0 mg kg
–1
(no external Cd), 50, 100 and 150 mg kg
–1
(were spiked as CdCl
2
·2.5H
2
O) were organised. Results showed that higher biomass productions in substrates A and B compare to substrate C, led to an increase total Cd uptake two times more than that in substrate C, at 150 mg kg
–1
concentration by
Populus alba
(
p
< 0.01). Meanwhile maximum uptake occurred in substrate A at 150 mg kg
–1
concentration by
Populs nigra
(
p
< 0.01).

Keywords: substrate, cocopeat, perlit, uptake, biomass, Cd pollution, phytoextraction, poplar

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