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Abstract
AJ-Salama, Yasser Jouma. Trials for increasing the efficiency of added phosphatic fertilizer. Unpublished master of Science, University of Ain Shams, Faculty of AgricultUre, Department of Soil Science, 1998:
This work was canied out to study the effect of seed soaking in phosphorus solution and mycorrhizal inoculation on the efficiency of phosphatic fertilizer, phosphorus and some micronutrients uptake by barley plants grown on alluvium and calcareous soils.
Laboratory experiment showed that seed soaking in distilled water for 3 or 6 hours has no effect. The highest values for germination percentage, dry weights and length of shoots and roots of seedling were obtained by seed soaking in 0.5 Molar KH2P04 for
6 hours.
Pot experiment, showed that mycorrhizal and non mycorrhizal barley plants grown on either alluvium or calcareous soils responded to increasing P-level. Mycorrhizal plants of either dry or soaked seeds responded to phosphatic fertilizer rather than non-mycorrhizal plants. Seed soaking and mycorrhizal inoculation increased the efficiency of added phosphatic fertilizer and the amount of phosphorus that derived from the native soil phosphorus; however, the effect of the latter seemed to be more pronounced.
Total uptake ofP, Fe, Zn, Mn and Cu by barley plants grown in both alluvium and calcareous soils increased by both seed soaking and mycorrhizal inoculation.