The accumulation of raw poultry residues in enormous quantities causes the release of odors and the leakage of toxic elements into the surface and groundwater, which negatively affects human health and the environment. So the bioreactor named the fixed-dome model as an anaerobic digester was designed and installed in the poultry field at the agricultural advisory office of college of agriculture at the University of Basra in Karmat-Ali, Iraq. Anaerobic organic fertilizer produced from anaerobic digestion pathway when raw poultry manure was fermented an aerobically for 56 days in the designed bioreactor, to study the use efficiency for anaerobic produced organic fertilizer and raw poultry manure when added at 150Kg N ha-1 at 0, 25, 50, 75, and 100 % of the recommended dose which was equal to a chemical recommendation for nitrogen as urea fertilizer while P and K were applied in a field experiment as traditional fertilizers(superphosphate and potassium sulfate respectively) to grow barley plants (Hordeum vulgare L.). Results showed that doses at 100% of anaerobic organic fertilizer were produced in the bioreactor with a significant increase in plant growth parameters as plant height, dry weight of shoot and amounts and their uptake of N and P elements in plants within 60 days of planting as compared to the rest treatments, so the biogas technology for the production of anaerobic organic fertilizer can help partly or mainly to reduce amounts of traditional doses of fertilizer.

The efficiency of eight organic and inorganic carries was tested from local materials they were soil, farm yard manure and their mixture at (1:1), charcoal, sludge waste, peatmose, composed sawdust and kaolounite clay mineral for carrying the becteria of Azospirrilum lipoferm and Bacilus Polymyxa which were isolated and identified from soil rhizosphere of different sites of south of Iraq, after incubate them for 180 days then with standard method the counts were determined at (30,60,90,120,150 and 180) days. The results showed that the efficient carrier was soil: farm yard manure at ratio (1:1) with the maximum no. of counts until 90 days of incubation time for both bacteria Azospirrillum and Bacillus. The next best carriers were sludge waste and farm manure only while the composed sawdusthad fewer counts so, we can say that carrier (soil: farm yard manure) as suitable for various crops and different species of bacteria.