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Application of potential phosphate-solubilizing bacteria and organic acids on phosphate solubilization from phosphate rock in aerobic rice.

Panhwar QA, Jusop S, Naher UA, Othman R, Razi MI - ScientificWorldJournal (2013)

Bottom Line: The results of the study showed significantly high P solubilization in PSB with organic acid treatments.Among the two organic acids, oxalic acid was found more effective compared to malic acid.A higher bacterial population was found in rhizosphere (8.78 log10 cfu g(-1)) compared to the nonrhizosphere and endosphere regions.

View Article: PubMed Central - PubMed

Affiliation: Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

ABSTRACT
A study was conducted at Universiti Putra Malaysia to determine the effect of phosphate-solubilizing bacteria (PSB) and organic acids (oxalic & malic) on phosphate (P) solubilization from phosphate rock (PR) and growth of aerobic rice. Four rates of each organic acid (0, 10, 20, and 30 mM), and PSB strain (Bacillus sp.) were applied to aerobic rice. Total bacterial populations, amount of P solubilization, P uptake, soil pH, and root morphology were determined. The results of the study showed significantly high P solubilization in PSB with organic acid treatments. Among the two organic acids, oxalic acid was found more effective compared to malic acid. Application of oxalic acid at 20 mM along with PSB16 significantly increased soluble soil P (28.39 mg kg(-1)), plant P uptake (0.78 P pot(-1)), and plant biomass (33.26 mg). Addition of organic acids with PSB and PR had no influence on soil pH during the planting period. A higher bacterial population was found in rhizosphere (8.78 log10 cfu g(-1)) compared to the nonrhizosphere and endosphere regions. The application of organic acids along with PSB enhanced soluble P in the soil solution, improved root growth, and increased plant biomass of aerobic rice seedlings without affecting soil pH.

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Related in: MedlinePlus

Effect of oxalic acid (OA) on soil pH. Bars indicate standard error, n = 5.
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Related In: Results  -  Collection


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fig4: Effect of oxalic acid (OA) on soil pH. Bars indicate standard error, n = 5.

Mentions: The soil pH during the planting period was not much affected (Figures 4 and 5). Slightly lower pH values were observed in PSB inoculated compared to noninoculated treatments. Among both acids a higher decrease in pH values was found with the addition of malic acid with PSB inoculation. The instability of organic acid or soil buffering system might have an effect in regulating the soil pH. However, slight decreases were found which could be due to the influence of organic acids to change pH in the rhizospheric regions.


Application of potential phosphate-solubilizing bacteria and organic acids on phosphate solubilization from phosphate rock in aerobic rice.

Panhwar QA, Jusop S, Naher UA, Othman R, Razi MI - ScientificWorldJournal (2013)

Effect of oxalic acid (OA) on soil pH. Bars indicate standard error, n = 5.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814071&req=5

fig4: Effect of oxalic acid (OA) on soil pH. Bars indicate standard error, n = 5.
Mentions: The soil pH during the planting period was not much affected (Figures 4 and 5). Slightly lower pH values were observed in PSB inoculated compared to noninoculated treatments. Among both acids a higher decrease in pH values was found with the addition of malic acid with PSB inoculation. The instability of organic acid or soil buffering system might have an effect in regulating the soil pH. However, slight decreases were found which could be due to the influence of organic acids to change pH in the rhizospheric regions.

Bottom Line: The results of the study showed significantly high P solubilization in PSB with organic acid treatments.Among the two organic acids, oxalic acid was found more effective compared to malic acid.A higher bacterial population was found in rhizosphere (8.78 log10 cfu g(-1)) compared to the nonrhizosphere and endosphere regions.

View Article: PubMed Central - PubMed

Affiliation: Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

ABSTRACT
A study was conducted at Universiti Putra Malaysia to determine the effect of phosphate-solubilizing bacteria (PSB) and organic acids (oxalic & malic) on phosphate (P) solubilization from phosphate rock (PR) and growth of aerobic rice. Four rates of each organic acid (0, 10, 20, and 30 mM), and PSB strain (Bacillus sp.) were applied to aerobic rice. Total bacterial populations, amount of P solubilization, P uptake, soil pH, and root morphology were determined. The results of the study showed significantly high P solubilization in PSB with organic acid treatments. Among the two organic acids, oxalic acid was found more effective compared to malic acid. Application of oxalic acid at 20 mM along with PSB16 significantly increased soluble soil P (28.39 mg kg(-1)), plant P uptake (0.78 P pot(-1)), and plant biomass (33.26 mg). Addition of organic acids with PSB and PR had no influence on soil pH during the planting period. A higher bacterial population was found in rhizosphere (8.78 log10 cfu g(-1)) compared to the nonrhizosphere and endosphere regions. The application of organic acids along with PSB enhanced soluble P in the soil solution, improved root growth, and increased plant biomass of aerobic rice seedlings without affecting soil pH.

Show MeSH
Related in: MedlinePlus