Abstract
A biological experiment was conducted at 20/1/2011 to 2/6/2011 in pots in the experimental farm of college of Agriculture, 3.5 km south of Arbil governorate, 36˚ 07N, 44˚01E, 0411359, 03997002 UTM. 411m above the sea level, during growing season 2011-2012 in order to determine the effect of different levels of phosphorus (0,10,20,30,and 40 mgkg -1 on heavy metals concentrations and uptake for different parts roots, shoots and grains of wheat plant Triticum durum L. cv.Summit. Soil samples were collected under the polluted location in the landfills were located between Bnaslawa district and Daratoo county, triple super phosphate fertilizer applied to soils to know the effect of phosphorus absorption and distribution of heavy metals in the different parts of wheat plant by using factorial Complete Randomize Design (CRD) with four replicates. The present investigation started at 24/1/2011 and plants were harvested at 2/6/2011. The increase of applied P caused a significant increase (p ≤ 0.05) of the dry matter weight of different parts of plant (roots, shoots and grains) and a significant decrease of heavy metal concentration. A negative correlation coefficient between P and Fe, Ni, Cd and Pb concentrations in roots were (0.98, 0.94, 0.95 and 0.99 and in shoots part 0.69, 0.93, 0.89, and 0.99 and in grains part 0.89, 0.90, 0.97, and 0.96) respectively.
Highlights
The application of different P amendments causes heavy metals in soils to shift from forms with high availability to the most strongly bound metals fractions (Miretzky and Fernandez-Cirelli, 2010)
Heavy metals have been linked to negative health effects, so it is desirable to reduce the heavy metal concentrations of crops entering the human diet
Heavy metals concentration in crops is influenced by a wide range of factors, including crop genetics, soil characteristics such as texture, pH and salinity, weather, crop sequence, crop management practices and soil heavy metal concentration(Grant et al 1999).Heavy metals are present at varying concentrations as a contaminant in phosphate (P) fertilizers (Taylor 1997;Grant et al 2002; Grant and Sheppard 2008) and repeated applications of P fertilizers may decrease heavy metals content of soils, potentially increasing trace metals content of crops across a range of soils and environments
Summary
The application of different P amendments causes heavy metals in soils to shift from forms with high availability to the most strongly bound metals fractions (Miretzky and Fernandez-Cirelli, 2010). This study was conducted to determine the long-term influence of Phosphorus applied (triple super phosphate) on heavy metals (Fe, Ni, Cd and Pb) concentration of different parts of durum wheat (roots, shoots and grains).
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