General Commission for Scientific Agricultural Research-
Deir Ezzor Research Center
Al-Ba’ath University, Faculty of Agriculture
Field experiment was carried out at Al-Mreiya station of Deir Ezzor Research Center in two seasons (2003\2004 -2004\2005). Three different sources of sulfur have been used in three rates of applications (0, 10, 20 T\ha) for gypsum and phosphogypsum, (0, 2, 4 T\ha) for sulfur to a clay sodic salt-affected soil.
The results showed an excel in the phosphogypsum treatment (20 t\ha) comparing with the other treatments on the effect of main properties to the studied soil, where the total porosity increased the apparent density, soil content of CaCO3 , ESP and pH were decreased under using this treatment. On the other hand soil content of phosphor was increased.
The results coming from gypsum application (20 t\ha) were approximate to the results coming from phosphogypsum application (20t\ha), while sulfur treatment (4 t\ha) occupied third place by affecting the studied properties. At the end of growth season the results showed a clear effect to phosphogypsum treatment (20 t\ha) on the weight of grains, straw and 1000 grain for both wheat and barley, reflecting positively the productivity of these crops.
As for the effect of treatments on the morphological characteristics of plants, the results showed that for plant height with/without spike, plant and spikes numbers per area unit, the excel of phosphogypsum, gypsum and sulfur treatments were 20, 20 and 4 t/ha respectively. The study has referred to a significant increase in the numbers and weight of grains, spikes for wheat and barley comparing with other treatments each season.