The study was conducted at the College of Agriculture-University of Anbar during the autumn of 2013 to study the effect of treated sewage effluent by decomposed hay waste and Rock phosphate on growth of Barley. The study included four quality of irrigation water (w): fresh water (w1) sewage effluent treated by decomposed hay waste (w2), treated by Rock phosphate (w3) and untreated sewage effluent (w4). Second factor is poultry manure levels: (O0) no added, (O1) 10 mt ha-1 , (O2) 20 mt ha-1, (O3) 30 mt ha-1 with three replication using (RCBD). At end of the experiment, dry weight and plant heights were measured, in addition to concentrations of Fe, Zn, Mn, Cu, Cd and Pb for Barley seeds.
Results showed a significant increase in shoot dry weight and plant heights with treated sewage by decomposed hay waste and Rock phosphate with values 50.44, 46.70 gm and 54.0, 50.58 cm respectively compared with fresh water and untreated water and increase in shoot dry weight and plant heights with levels of poultry manure. Fe, Zn, Mn, Cu, Cd, Pb concentrations decrease in Barley seeds with irrigated sewage treated by decomposed hay waste and treated by Rock phosphate, with 41.35, 31.0, 11.09, 1.31, 0.275, 0.621 mg kg-1 and 40.84, 29.5, 10.95, 1.30, 0.295, 0.635 mg.kg-1respectively. Compared with untreated sewage water and increasing of poultry manure levels resulted in increase of Fe, Zn, Mn, Cu concentration in Barley seeds giving 43.34, 33.40, 11.75, 1.63 mg kg-1 respectively compared with control , while concentration Cd, Pb decrease with poultry manure addition.