Influence of Phosphate Dissolving Bacteria on the Efficiency of Superphosphate in a Calcareous Soil Cultivated with Vicia faba

Abstract

In a pot experiment with Vicia faba grown in a calcareous soil and fertilized with three rates on superphosphate, inoculation with phosphate dissolving bacteria (PDB) increased P‐uptake and dry weight. The effect of inoculation exceeded that of the fertilization with half of the usual rate. Dry weight and P‐uptake of plants grown in inoculated soils receiving one half of the usual rate of superphosphate were higher than those for plants grown in pots receiving the usual rate of superphosphate in the absence of the inoculation. The usual rate of superphosphate in the presence of inoculation doubled both P‐uptake and dry weight of Vicia faba. However, one half of the usual rate of superphosphate in the presence of inoculation with PDB increased P‐uptake and dry weight of faba plants by one half more than the control.

Effect of Inoculating Crops with Phospho-microbes

“…The soils were therefore unsterilized, the recommended fertilizers applied and the microbial strains were only evaluated for their capacity to enhance crop yields. Experiments carried out in agriculturally advanced countries using culture suspensions of phosphorus-solubilizing organisms have demonstrated that they can have a significant effect on the mobilization of soil phosphates and increase crop yields (Khalafallah et al, 1982;Barea and Azcon-Agnilar, 1982;Monib et al, 1984;Fernandez et al, 1985;Badr et al, 1986;Piccini and Azoon, 1987). These results and those from our experiment show that bio-fertilization with phospho-microbes has considerable potential.…”

Thermotolerant phosphate solubilizing microorganisms and their interaction with mung bean

“…Seed or soil inoculation with phosphobacteria was reported to improve the yield and nutrient uptake of various crops (Khalafallah, 1982). The favourable effect of the inoculants on plant growth and nutrient uptake was due to the improved phosphate nutrition and production of growth promoting substances by PSM (Barea et al, 1976;Sattar and Gaur, 1987).…”

Inoculation With Growth-Promoting Bacteria Associated With the Reduction of Phosphate Fertilization in Sugarcane

“…This might be due to the reason that these microorganisms utilize and adapt certain mechanisms which directly contribute and improve plant growth and yield. Inoculatin Vicia faba plants with phosphate solubilizing bacteria, Khalafallah et al (1982) indicated that phosphorus fertilization was reduced by 50% with inoculation. The plants applied with half dose of fertilizer resulted in similar dry mass to that plant applied with 100% of fertilizers.…”