The Feasibility of Using Unconventional Fertilizers on P Availability in Soil | ||||
| Egyptian Journal of Soil Science | ||||
| Article 5, Volume 53, Issue 1, March 2013, Page 55-65 PDF (402.07 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejss.2013.140 | ||||
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| Abstract | ||||
| THE FEASIBILITY of using different untraditional P sources, i.e., compost, ground animal bones, ground fish bones and the rock phosphate together with phosphorin inoculants (P-dissolving bacteria) on improving P availability in soil is the aim of this study. The results show that the overall values of NaHCO3 extractable-P were significantly higher in the Typic Torripsamments soil treated with compost, besides the no-P-treatment (control soil ) compared with the other P sources, whereas P-extractability remained statistically unchanged in the sandy loam soil under all treatments. Thus unconventional P-sources seemed to bring P in soils of poor P content to new levels of equilibrium. The results also reveal that P-extractability increased in the sandy loam soil during the incubation period in the form of consecutive peaks, each peak represents a case of significant increases in P extractability in soil followed by sudden reductions in extractable-P. Soils treated with animal bones, rock phosphate and fish bones recorded the highest increases in extractable P, while these treatments recorded the lowest values of extractable P at the beginning as well as at the end of peak relationships. On the other hand, the extractability of P changed in the Typic Torripsamments soil during the incubation period in the form of a single peak. The results confirm the importance of periodical inoculation of soil with phosphorin during the plant growth to improve P availability in soil and pointed up to the importance of rock phosphate, animal bones and fish bones as alternative sources for traditional or conventional fertilizers. | ||||
| Keywords | ||||
| Phosphate; Phosphorin; Unconventional P fertilizers; Bioavailability cycles; phosphorus | ||||
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