Bacteria Pseudomonas striata, Bacillus polymyxa, B. megaterium and B. pulvifaciens, and fungi Aspergillus awamori, A. niger and Penicillium digitatum dissolve tricalcium phosphate and, much less, Mussorie and Udaipur rock phosphate. The solubilizing power of fungi was higher than that of bacteria, t …

Rhizospheric microbes assimilate a large amount of phosphorus indirectly from the soil, dissolving insoluble phosphorus (Halvorson et al. 1990). ... Rajapaksha CP, Senanayake AP (2011) Potential use of rock-phosphate-solubilizing bacteria associated with wild rice as inoculants for improved rice (Oryza sativa). Arch Agron Soil Sci 57:775–788.

However, the predictions of Eq. (14) are not in good agreement of the experimental results for a leaching phosphate rock into sulfuric acid. The gap is substantial for the high reaction time (Fig. 6).The reason of this is that the formation of the solid (gypsum) can clog the pores and the pore diffusion model will be faulty.

Leaching soluble phosphorus from rock phosphate containing pyrites by Acidithiobacillus ferrooxidans (A. f.) is feasible, and the reaction mechanism is as follows. Pyrites are oxidized by A. f. to produce H 2 SO 4 and FeSO 4; the rock phosphate is decomposed by H 2 SO 4, forming soluble phosphorus compounds; and Fe 2+ from …

As phosphorus (P) bioavailability is limited in arable lands, chemical fertilizers are being used by farmers to increase crop production. Phosphate-solubilizing microorganisms (PSMs) increase the bioavailability of sparingly soluble inorganic and organic soil phosphorus. Therefore, the current study was an effort to evaluate the …

Phosphate-solubilizing bacteria (PSB) have the potential to make insoluble phosphate available to plants through solubilization and mineralization, …

The present investigation reveals the solubilization efficiency of tri-calcium phosphate (TCP), Udaipur rock phosphate (URP), aluminium phosphate (AP) and ferric phosphate (FP) by Aspergillus niger (ITCC 6719) and Trichoderma harzianum (ITCC 6721) as function of carbon concentrations. Increasing glucose concentration from 1 to 7% in …

Date 1986 Description. The effect of inoculating soil with phosphate rock dissolving bacteria (PRDB) or sulphur (S) oxidising micro-organisms on shoot dry matter (DM) production and phosphorus (P) uptake of a tomato cultivar (#Lycopersicon esculentum# Mill, Virosa NT2) colonised with the vesicular-arbuscular mycorrhizal (VAM) fungus …

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Natural phosphate-bearing material, such as rock phosphate (RP), represents a less costly plant fertilization option but is a limiting nutrient in the plant available form (de Medeiros et al. 2019).Therefore, in the manufacturing of conventional phosphorus (P) fertilizer, high-grade RPs are treated with sulfuric acid at an elevated …

enhancement of applicability of rock phosphate by addition of compost and inoculation with phosphate dissolving bacteria and its effect on quality and productivity of canola plant. The experiment included 3 factors as follows: (1) three rates of rock phosphate i.e. 0 (RP 0), 250 kg ha-1 (RP 1) and 500 kg ha-1 (RP 2

Fungi Phosphate dissolution Plant growth promotion Salt stress. The present investigation reveals the solubilization efficiency of tri-calcium phosphate (TCP), Udaipur rock phosphate (URP), aluminium phosphate (AP) and ferric phosphate (FP) by Aspergillus niger (ITCC 6719) and Trichoderma harzianum (ITCC 6721) as function of carbon …

Request PDF | Improved efficiency of Sedum lineare (Crassulaceae) in remediation of arsenic-contaminated soil by phosphate-dissolving strain P-1 in association with phosphate rock | The selection ...

Rhizospheres ofTrifolium alexandrinum andPhaseolus aureus appear to provide more suitable environment for phosphate-dissolving organisms than those ofCrotalaria juncea andSesbania aculeata. SummaryTwelve phosphate-solubilising organisms were isolated from the rhizosphere of four cultivated legumes growing in four soil regions of India. …

The present work evaluated the synergistic effects of soil fertilization with rock P and K materials and co-inoculation with P and K-dissolving bacteria [PDB (Bacillus megaterium var. phosphaticum) and KDB (Bacillus mucilaginosus and B. subtilis)] on the improvement of P and K uptake, P and K availability and growth of maize plant grown …

The phosphorus dissolving and growth promoting properties of PSB are summarized. ... Isolation of phosphate solubilizing bacteria from maize rhizosphere and their potential for rock phosphate solubilization-mineralization and plant growth promotion. Geomicrobiol J., 34 (1) (2017), pp. 81-95, 10.1080/01490451.2016.1146373.

One such strategy is the application of phosphate-solubilizing microorganisms which can solubilize insoluble phosphates in soil by different mechanisms like secretion of …

The Solubilization of Rock Phosphate by Organic Acids. November 2006. Phosphorus, Sulfur, and Silicon and the Related Elements Sulfur (11):2541-2554. DOI: Authors: Ralitsa Teodosieva. University ...

Lactic acid dissolve carbonate material in low grade phosphate rock, therefore, it improved the P 2 O 5 content. The large polarity of O H bond present in strong organic acids, may not react with pure calcium carbonate. However, in dilute solutions, …

Siderophores are small molecules with low molecular weights, and under low iron stress, phosphate-dissolving bacteria produce siderophores that chelate Fe 3+, Al 3+ and Ca 2+ in the soil, ... The Relationship Between Rock Phosphate Solubilization and pH and Organic Acid Production of Microorganisms. J. Microbiol. 2003; 23:5–7. [Google …

A Review of Phosphate dissolving Microorganisms. Zhao Xiao. Published 2001. Environmental Science, Biology, Agricultural and Food Sciences. Soils and fertilizers. TLDR. It is generally described that the microorganisms may be beneficial to plant growth and their number and community structure in soils and plant rhizosphere is reviewed. …

A high correlation was observed between final pH and soluble phosphate only for the rock phosphates inoculated with the highest concentration of solubilizing bacteria (r=−0.73 to −0.98). Forty two soil isolates (31 bacteria and 11 fungi) were studied for their ability to solubilize rock phosphate and calcium phosphate in culture medium. …

The experment included the study and meki comparision for sample of many species of fungi genes into melting the phosphate rock in the soil and it is action in the growth of the wheat plant by ...

Therefore, rock phosphate is a good source of phosphorus if organic manure and powdered sulphur with phosphate dissolving bacteria are added . The addition of compost to the soils improves their physical, chemical, and biological properties, which influence the growth and development of plants.

The effects of inoculation of Acinetobacter sp. phosphate solubilizing bacteria P-1 a … Improved efficiency of Sedum lineare (Crassulaceae) in remediation of arsenic-contaminated soil by phosphate-dissolving strain P-1 in association with phosphate rock

The basic principle of the biotechnological processing of natural phosphates is the production of organic acids, mainly citric, oxalic, and gluconic acid, that attack and dissolve the phosphates,...

Directly applying unprocessed phosphate rock to soil may provide a valuable source of plant nutrients in specific conditions, but growers must consider several complicating factors and limitations. ... Labs estimate the effectiveness of phosphate rock for direct application by dissolving rock in a solution containing a dilute acid to simulate ...

Our results concluded that the bacterial rock phosphate-solubilization was intimately related to organic acids production which in turn seemed to be driven by the assimilation of NO3- by bacteria. ... 41C, …

The effectiveness of Phosphobacterin on soil of the Kustanian region in relation to their method of cultivation. Agrobiologiya 4, 604–614. Soils and Fert. 23, 38. Raghu, K. and MacRae, I. C., Occurrence of phosphate dissolving microorganisms in the rhizosphere of rice plants and in submerged soils. J.

Effect of organic acids on phosphate rock solubilization. Figure 1 shows the solubilization efficiency for three phosphate sources on nine organics acids, two inorganic acids and …