Impact of application of rock phosphate (RP) inoculated with phosphate solubilizing fungi (PSF) as a fertilizer on total nitrogen (TN), total organic carbon (TOC) and microbial count (MC) in clay soil


Impact of application of rock phosphate (RP) inoculated with phosphate solubilizing fungi (PSF) as a fertilizer on total nitrogen (TN), total organic carbon (TOC) and microbial count (MC) in clay soil


Hefnawy M. A., Gharieb M. M., Omima A. Eissa, Asmaa M. A. Ammar*

Botany Dept. Faculty of Science, Menoufia University, Egypt.


American Journal of Agricultural Research

In this study the effect of four treatments of phosphate fertilizers (NS, RP, SP & RP inoculated with PSF (A. niger & A. fumigatus) using three doses (RD, 1/2 RD&2RD) on TN, OC and MC of Nile delta clay soil and its impact on some growth parameters of phasoleous vulgaris was monitored. The Results indicated that OC content of clay soil was positively affected by the amendment of soil with inoculated RP. Inoculation of RP with A.niger culture increased the OC content of the soil by 4.91%, 18.28%, 14.38% and 19.61% comparing to A.fumigatus, NS, RP and SP respectively. the highest soil organic carbon content obtained when soil was amended with inoculated RP in 1/2RD it increased by 1.02% and 7.232% comparing to the amendment of with RD and 2RD. RP inoculated with A.niger culture clay soil showed the highest TN content when amended with 2RD the presence of phasloeus vulgaris plant it was 19.19%. Different phosphate treatments affected MC in clay soil to reach the highest count when inoculated rock phosphate with the RD as a fertilizer it increased by5.66% & 20.75% case of A.fumigatus & A.niger respectively comparing to NS. The lowest count obtained when SP was used as a fertilizer, it decreased by 26.4% comparing to NS.


Keywords:phosphate solubilizing fungi, phosphate biofertilizers, inoculated rock phosphate, soil organic carbon content, soil total nitrogen content.

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How to cite this article:

Hefnawy M. A., Gharieb M. M., Omima A. Eissa, Asmaa M. A. Ammar. Impact of application of rock phosphate (RP) inoculated with phosphate solubilizing fungi (PSF) as a fertilizer on total nitrogen (TN), total organic carbon (TOC) and microbial count (MC) in clay soil. American Journal of Agricultural Research, 2018,3:20. DOI:10.28933/ajar-2018-06-2801


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