THE POTENTIAL IMPROVEMENT OF Zea mays YIELD A~D ITS 'CONTENT OF PHOSPHORUS AND NITROGEN AS A RESULT OF DIFFERENT INOCULATION METHODS WITH PHOSPHATE-DISSOLVING BACTERIA | ||||
| Journal of Agricultural Chemistry and Biotechnology | ||||
| Article 1, Volume 28, Issue 11, November 2003, Page 6875-6885 PDF (390.84 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jacb.2003.246299 | ||||
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| Authors | ||||
| M. A. 0. EI-Mohandes,1; T. M. M. Moharram2; T. S. M. Shady3; Kh. M. Ghanem1 | ||||
| 1Environ. and Blo-Agrlc. Dept.; Fac. of Agrlc., EI-Azhar Univ., Cairo, Egypt. | ||||
| 2Dept. Of Agrlc. Mlcroblol., Fac. of Agric., Mlnla Univ., Minia , Egypt | ||||
| 3Microbiol. Dept., Soli, Water and Environ. Res. Institute, Agric. Res. Center, Giza, Egypt | ||||
| Abstract | ||||
| The interaction between phosphate-dissolving bacteria and Zea mays plants was investigated. Results showed that: Highly variation in the ability of phosphate- solubilizing bacteria in bringing down the pH of the media and consequently varied in their ability in releasing soluble phosphorus. The highest level of soluble-P (421.9 ppm) was released by isolate No. 15. Greatest amount of maize dry weight and Qrain yield was obtained with the Inoculation at 10 and 20 days after planting. The inoculation at 10 and 20 days with cell suspension was more active than its application as cell suspension to the grains one hour before sowing. P and N content in maize plants and their grain were increased signiflcanUy with the treatments of grain slurry plus supplementary inoculation of cell suspension at 10 or at 10 an~20 days after planting and those inoculated with cell suspension at 10 and 20 days rom planting. There are a positive correlation between Inoculation with phosp ate dissolvers and N-content in the plant during the two seasons. Results also sho ed maximum counts of phosphate dissolving bacteria in rhizosphere soil of maize hfter 60 days from sowing in all treatment, which gradualty increased up to 60 days, thereafter decreased. The inoculation of maize plants with phosphate dissolving bacteria increased the amount of soluble phosphorus in the rhizosphere soil of maize compared to the non-inoculated soil. The increase of phosphorus content was significant with the treatment of seed slurry plus supplementary cell suspension Jt 10 and 20 days after planting. Therefore, the application of rock phosphate and inoculation with efficient phosphate-dissolving bacteria produced more amount of soluble phosphorus In the soil. which plays an important role in metabolic pathways in living organisms and thus increased the yield of plant. | ||||
| Keywords | ||||
| Zea mays; phosphate-solubilizing bacteria; inoculation; rock phosphate | ||||
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