Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2009
Volume 12
Issue 2
Topic:
Agronomy
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Hecl J. , Tóth ©. 2009. EFFECT OF FERTILIZERS AND SORBENTS APPLIED TO THE SOIL ON HEAVY METAL TRANSFER FROM THE SOIL, EJPAU 12(2), #17.
Available Online: http://www.ejpau.media.pl/volume12/issue2/abs-17.html

EFFECT OF FERTILIZERS AND SORBENTS APPLIED TO THE SOIL ON HEAVY METAL TRANSFER FROM THE SOIL

Ján Hecl, ©tefan Tóth
Plant Production Research Centre – Agroecology Research Institute in Michalovce, Slovak Republic

 

ABSTRACT


The research evaluates the immobility effect of some
fertilizers and sorbents on heavy metal transfer from soil to soybean and on
the mobile and mobilized fractions of the content of heavy metal in the soil.
A pot experiment with the excessive content of toxic heavy metals was performed.
Heavy metals, such as Cd, Pb, and Ni were applied to pot soil before soybean
planting as a chloride salts in the following doses: Cd – 5 mg, Pb – 150 mg,
and Ni – 100 mg per kg (ppm). The trial was established under two soil pH levels
– natural soil pH = 6.5, and adjusted soil pH by sulphuric acid to pH = 5.5.
Soil and plant (whole plants, empty pods, and seeds) samples were analyzed and
the content of Cd, Pb, and Ni was established by the atomic absorption spectrometry
(AAS). To analyse heavy metal content in the soil samples, the following extractants
were used: 2M HNO3 (nitric acid), EDTA (ethylenediaminetetra acetic
acid), and CaCl2 (calcium chloride). The data was statistically evaluated
by ANOVA using Statgraphics. Applied fertilizers and sorbents decreased the content
of the heavy metals in the soil in comparison with the untreated control. Heavy
metal contents in soybean plant parts during the trial years were only a little
different from the average of single plant parts. There was a statistically significant
correlation between heavy metal content in the soil and soybean in Cd and Ni
in the EDTA extractant. The best results from the point of heavy metal immobilization
were obtained in the manured variant for the lowest heavy metal content. Soil
pH range (5.5–6.5) during the trial period had no influence on the heavy metal
content in soybean. The positive immobilization effect of humus on the heavy
metals was observed under a lower pH value.

Key words: soybean, heavy metals immobilization, fertilizers.


Ján Hecl
Plant Production Research Centre – Agroecology Research Institute in Michalovce, Slovak Republic
©pitálska 1273, 071 01 Michalovce, Slovenská Republika
email: hecl@scpv-ua.sk

©tefan Tóth
Plant Production Research Centre – Agroecology Research Institute in Michalovce, Slovak Republic
©pitálska 1273, 071 01 Michalovce, Slovenská Republika

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.