Environmental impact assessment using the direct method of chemical fertilization on the accumulation of some heavy and radioactive elements in soils and plants growing in Abu Ghraib District

Abstract

   The direct method has been used in assessing the environmental impact of successive chemical fertilization on the accumulation of some heavy and radioactive elements in the soil and plants growing in Abu Ghraib District , as the researcher collected several samples of chemical fertilizers commonly used in Iraq and soil samples with different chemical and physical properties , as well On the growing plants the tomato plant was a model during different time periods of cultivation , as the results of statistical analyzes showed the presence of highly significant differences between the rates of accumulation of heavy elements with different periods of cultivation and soil type , as the results indicated There is a strong correlation relationship at the level of significance ( 5% ) between the soil content of heavy elements and the culture period and their concentration in the growing plants in them , and the results also showed a significant effect of the type of fertilizer used and added to the soil in the values ​​of its content of polluted heavy elements ( Pb , Ni , U²³⁸ , Th²³² ) where significant differences were found between the nitrogenous phosphatic and potassium fertilizers content of these elements and in general the fertilizer content of heavy pollutant elements ( Pb , Ni ) can be arranged as follows     ( MAP < NPK < DAP < TSP) and from the radioactive elements ( U²³⁸ , Th²³² ) as follows ( NPK < MAP < DAP < TSP ) and between test analysis For a wide range of industrial fertilizers produced some phosphate fertilizers micronutrient nutrients and phosphate rock contain high levels of cadmium , arsenic , lead , uranium and thorium compared to other fertilizer types such as nitrogen fertilizers , potassium and gypsum .