Calcium silicate to reduce heavy metal toxicity in eucalyptus seedlings

被引：0

作者：

de Aguiar Accioly, Adriana Maria ^{[1
]}

Fonseca Sousa Soares, Claudio Roberto ^{[2
]}

Siqueira, Jose Oswaldo ^{[2
]}

机构：

[1] Embrapa Mandioca & Fruticultura Trop, BR-44380000 Cruz Das Almas, BA, Brazil

[2] Univ Fed Lavras, Dept Ciencia Solo, BR-37200000 Lavras, MG, Brazil

来源：

PESQUISA AGROPECUARIA BRASILEIRA | 2009年 / 44卷 / 02期

关键词：

Eucalyptus camaldulensis; cadmium; phytostabilization; phytotoxicity; soil pollution; zinc; POLLUTED SOILS; PLANTS; CADMIUM; GROWTH; ZINC; AMENDMENTS; TOLERANCE; ZN;

D O I：

暂无

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The objective of this study was to evaluate the effect of calcium silicate to reduce heavy metal toxicity in Eucalyptus camaldulensis seedlings. Five doses of calcium silicate (0, 1.6, 3.2, 4.8, and 6.4 g kg(-1)) were used in soils with increasing levels of contamination. The experiment was carried out in pots with 1.5 kg of soil, with one plant each, in a 4x5 factorial array (four levels of contamination x five silicate doses). Calcium silicate minimized heavy metal toxicity to E. camaldulensis, delayed the onset of toxicity symptoms, and decreased zinc and cadmium shoot concentrations. However, calcium silicate did not completely overcome the depressive effect upon plant growth in soils with high metal concentrations. Calcium silicate effects increased with increasing doses and were more evident in highly contaminated soils. The beneficial effects of calcium silicate on metal toxicity were highly related to the decrease in zinc translocation to the eucalyptus shoots.

引用

页码：180 / 188

页数：9

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