EFFECT OF RADIO-ELEMENTS IN THE BLACK SANDS ON WILD PLANT THAT GROWN EASTERN AND WESTERN ROSETTA BRANCH, EGYPT

The black-sand deposits are widely distributed alongside the Mediterranean Sea coast from Abu-Quir
in the west to Rafah city in the extreme east. It contains, minerals, which is considered as the main source
of uranium, thorium, potassium and iron oxides as a heavy and / or radio elements. These elements may
be transferred with irrigation water to the plant organ (s), or even prevented the adsorption of nutrients.
To achieve this purpose, surface soil samples (0-30 cm.) and subsurface soil samples (30 - 60cm) were
collected from eastern and western of Rosetta area., also Aerva plants samples (roots, stems, leaves and
flowers) as a wild plant were collected from these areas to evaluate the object of this study..The results
showed highest values of thorium, uranium, potassium and iron detected in soil and plant samples near
Rosetta estuary at two sides (eastern and western). The available N. P. K. and Fe in western soil samples
were higher than that obtained by eastern soil samples. The N. P. K. content of the plant organ (s) samples
that grown at western side were higher than that found the eastern side. The highest thorium, uranium and
iron content found in plant root and the least were in the leaves or flowers plants, at two Rosetta sides. Also,
total uranium, thorium and iron content in western side were higher than eastern side soil samples.