THE ROLE OF BIOLOGICAL-FERTILIZER, PHOSPHATE ROCKS AND THE INTERACTION BETWEEN THEM ON THE PHOSPHOROUS AVAILABILITY IN SOIL AND PHOSPHOROUS UPTAKE BY CUCUMBER PLANT AND ITS EFFECT ON YIELD

Abstract

A filed experiment was achieved in Abu-Ghraib during autumn season 2015 to test the activity of three types of biological fertilizer and phosphate rock as a sources of phosphorus. The treatments included ; Mycorrhiza mixed with phosphate rock, Bacillus mixed with phosphate rock, Mycorrhiza and Bacillus mixed with phosphate rock and phosphate rock alone. A 2% poultry decaying remnants was mixed to a 15 cm depth of soil and added before planting. Fertilizers was added according to the recommendations, and phosphate rock was added as a source of phosphorus. Result indicates that the treatment of the Mycorrhiza and Bacillus mixed with phosphate rock was the best in compared with other treatments. It gave about 12.96 mg P.kg-1 as an available phosphorus in soil, and about 0.3637% uptake phosphorus by the leaves of the plant, and about 3.943 k .ha-1 uptake phosphorus by vegetative part of the plant. The increasing of phosphorus supply of thin treatment as compared with the phosphate rock alone treatment were reached about 28.13, 23.41 and 91.40% for the phosphorus in soil, phosphorus in leaves and phosphorus in vegetative parts, respectively. Mycorrhiza treatment was in second order in compare to the to the residual treatments