Method of achieving organic phosphorus fertilizer by use of rock phosphate and poultry manure.

The experiments conducted to investigate the role of poultry manure on phosphorus solubility from phosphate. Experiment was done with 4 treatments and 3 replications in a completely randomized design. treatments were: 1) two levels of moisture content (field capacity and saturation) ,2) cow manure at three rates (20,40,60 percent) , 3 ) two kinds of phosphate rock (crude and condensate) , 4) three times (15,30, 60 days) was performed. The citrate soluble phosphorus was significantly more than insoluble in citrate and soluble in water. The results showed that the citrate -soluble phosphorus decreased over time was not statistically significant , but in phosphorus soluble in water was increased significantly. With increasing the concentration of poultry manure, the soluble phosphorus in citrate decreased significantly but water soluble phosphorus showed a significant increases .The impact of moisture on water soluble phosphorus was not significant but citrate soluble phosphorus significantly decreased with increasing the amount of moisture . Interactive effects of moisture ,types of rock phosphate , times and the percentage of poultry manure consumption on phosphorus solubility showed that the water soluble phosphorus was greatest in field capacity moisture, 60% poultry manure concentration , concentrated rock phosphate and at time of 15 days . Also the greatest amount of citrate -soluble phosphorus was in saturated moisture, 20% poultry manure, concentrated rock phosphate and times of 15 days. The use of poultry manure mixed with rock phosphate had a little effect on phosphorus availability . The research has shown that many factors is affected the availability of phosphorus from rock phosphate (like root and microbial secretion) that can affect the supply of phosphate in rock phosphorus by plants than in vitro. Key: Poultry manure- availability - Rock Phosphate