307-5 Effect of the Silicon in the Extraction of Cadmium by Native Plants of Brasilian's Savanas.

Poster Number 2231

See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Silicon As a Beneficial Element for Plants
Tuesday, October 23, 2012
Duke Energy Convention Center, Exhibit Hall AB, Level 1
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Lilian A. oliveira Sr.1, Gaspar Korndorfer2, Cassio H. Abreu Jr Sr.3, Marcus Sampaio4 and Ana Korndorfer4, (1)instituto de ciencias agrarias, Universidade federal de Uberlandia, uberlandia, Brazil
(2)Agronomy, University Federal of Uberlandia, Uberlandia, Brazil
(3)CENA, Universidade de sao paulo, Piracicaba, Brazil
(4)Agricultural Sciences Institute, Federal University of Uberlandia, Uberlandia, Brazil
That trial of decontamination of soil for plant, to fitoextraÁ„o, search capable species of extract metals of him soil on a large scale, without injure his development. The native plants of brazilianís savannas (Cerrado) can be promising, seen that these are adapted to diverse conditions of stress, and one of the factors that possibly helps in that adaptation is the accumulation of silicon. The effect of the silicon in diminish the stress caused by some metals already was shown, as by example, the cadmium. This interaction can occur due to the immobilization of the metal in soil, or by interactions that occur inside the plant. Like this, the native plants of him closed can be capable of accumulate big quantity of cadmium, beyond that, the application of silicate can function like heavy metals immobilization factor in him soil. Aiming at verify these hypotheses; this work utilized two native species of Cerrado, Psidium firmum (AraÁŠ) and Tabeluia golden (IpÍ yellow). In these solos was added chloride of cadmium for obtaining the doses of: 10.0 and 50.0 mg kg-1, maintaining witness without cadmium. In these doses of cadmium was applied 100 mg kg-1 of silicon, with witness without silicon, having like spring the silicate of calcium. The results obtained of this experience showed that the growth of IpÍ yellow and AraÁŠ was built up by the presence of silicon, when cultivated in sandís soil. Being that the IpÍ accumulates more silicon, however the AraÁŠ has bigger capacity of resist to the excess of cadmium in the environment of cultivation. The application of silicate shows different effects in the two kinds of soil and for the two species studied.
See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Silicon As a Beneficial Element for Plants