Zinc fractionation in the rhizosphere of wheat (Triticum aestivum L.) plant in soils treated with sewage sludge
Soil Science Department, Faculty of Agriculture, Shahrekord University, P.O. Box 115, Shahrekord, Iran
Rhizosphere is a microbiosphere and has quite different chemical, physical and biological properties from bulk soils. A greenhouse experiment was performed to compare fractionation of Zinc (Zn) between rhizosphere and bulk soils amended with sewage sludge (1% w/w of sewage sludge to soil). Fractions of Zn were determined in two subsamples (rhizosphere and bulk soils). The results indicated concentration of Zn-fractions (except carbonates-associated) in the rhizosphere soils were significantly (p<0.05) different from concentrations of Zn-fractions in the bulk soils. Also, results revealed that significant correlation (p<0.05) between Zn associated with iron-manganese and yield and uptake indices in the rhizosphere and bulk soils were found. The results of this research illustrated that rhizosphere is a small zone but important environmental zone in soils with quite different properties.
Key words: Rhizosphere / Zinc / Fractionation technique
© Owned by the authors, published by EDP Sciences, 2013
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