اعلانات هامة

A field experiment was carried out to determine the capacity of three different plants species i.e. Desert Wheatgrass (Agropyron desertorum) Triticale (Triticosecale Wittm) and Salt Bush (Atriplex halimus) in reducing the soil salinity as a biological way to remediate saline soils, A part of the land was left as a control without planting. A moderately salinity soil (ECe=8.16 dS.m) was used in the experiment and the water of the Euphrates river was used in irrigation (ECw=0.89 dS.m*), the soil was studied in four depths (0-25,25-50,50-75,75-100 cm).

The results showed that, the three plant species had reduced the soil salinity in the surface layer, and the percentages of reducing were 51, 48, 35 and 27% for Atriplex halimus, Triticosecale Wittm, Agropyron desertorum and control, respectively.

The results of the statistical analysis of the surface layer, showed significant differences between the plant species according to their capacity to reduce the soil salinity, where the Atriplex halimus was significantly excelled. On the other hand, the highest reduction of the soil salinity was in surface layer and decreased with the depth for Atriplex and Triticale.

The results indicated that, the three plants species had a different effects in removing of Ca, Mg, Na, and  K  through the soil profile, where Ca** removing was much bigger in the soil planted with Atriplex halimus than Na+ and, which were removed strongly from the soil planted with Triticosecale Wittm.

Keywords: Salt- Affected Soil, Sodicity, Phytoremediation, Atriplex halimus, Triticosecale Wittm, Agropyron desertorum.

في تجربة حقلية لتحديد قدرة بعض الأنواع النباتية في خفض ملوحة التربة كطريقة حيوية لاستصلاح الأراضي المالحة، تم زراعة ثلاثة أنواع نباتية وهي حشيشة القمح Agropyron desertorum و التريتكالي Triticosecale Wittm و الرغل الملحي Atriplex halimus، في تربة متوسط ملوحتها للعجينة المشبعة (ECe=0,89 Ds.m)وتم تتبع قيم التوصيل الكهربائي على أربعة أعماق (0-25، 25-50، 50-75، 75 100سم).