Fathi, A. I. ; S. M. Abdelaziz and Seham M. Abd El-Azeem( 2015). Raising rock phosphate efficiency for seasame productivity in sandy soilEgypt. J. of Appl. Sci., 30(1):51-66
Abstract: A field experiment was conducted at Ismailia Agric. Res. Station, Egypt, during summer season 2013 in order to evaluate organic manure, sulphur and microorganisms {phosphorous solubilizing bacteria (PSB) and sulphur oxidizing bacteria (SOB)} inoculation on enhancing phosphorus availability from rock phosphate (RP) and their effects on growth, yield and yield components of sesame plant. Results showed that single super phosphate resulted in the highest plant growth parameters, yield attributes, seed, biological yield and nutrients uptake by sesame seedlings at 90 days after sowing (DAS) and showed a trend similar to values of relative agronomic efficiency (RAE). Either organic manure (OM) or PSB inoculation with RP had a significant increase on plant growth parameters, nutrients uptake by sesame seedlings at 90 (DAS), as well as yield and yield components. These increases were observed when the combination of organic manure (OM) and phosphorous solubilizing bacteria (PSB) inoculation applied together with RP. These were observed for corresponding values of seed and oil yield related to plants were fertilized by RP along with tri-combination of sulphur, OM and microorganisms (PSB and SOB) giving 500 kg/fed and 225.5 kg/fed, respectively, which was not significantly different from treatment of single super phosphate. Oil percent was not significantly different between the control and other treatments without sulphur. Sulphur treatments resulted in the highest amount of oil yield/fed. Results also showed that the combination of soil amendments and bio-fertilizer can be a favorable method to increase the efficiency of naturally rock phosphate and may be considered as an effective new phosphate fertilizer for crop production.
Keywords: (Sesame, Rock phosphate, Organic manure, Sulphur and Bio- fertilization)
