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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 organic acids (a) oxalic acid (b) malic acid on plant biomass. Bars indicate standard error, n = 5.
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fig3: Effect of organic acids (a) oxalic acid (b) malic acid on plant biomass. Bars indicate standard error, n = 5.

Mentions: Inoculation of PSB with PR showed higher plant biomass than noninoculated treatments (Figure 3). Application of organic acids with PSB16 and PR significantly increased the plant biomass, and comparatively oxalic acid produced higher plant biomass than malic acid. The highest plant biomass (33.26 mg) was recorded in PSB inoculated plants at 20 mM oxalic acid concentration with PR (Figure 3(a)). Application of malic acid increased biomass at 10 mM and showed no further increase at higher levels (Figure 3(b)).


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 organic acids (a) oxalic acid (b) malic acid on plant biomass. Bars indicate standard error, n = 5.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Effect of organic acids (a) oxalic acid (b) malic acid on plant biomass. Bars indicate standard error, n = 5.
Mentions: Inoculation of PSB with PR showed higher plant biomass than noninoculated treatments (Figure 3). Application of organic acids with PSB16 and PR significantly increased the plant biomass, and comparatively oxalic acid produced higher plant biomass than malic acid. The highest plant biomass (33.26 mg) was recorded in PSB inoculated plants at 20 mM oxalic acid concentration with PR (Figure 3(a)). Application of malic acid increased biomass at 10 mM and showed no further increase at higher levels (Figure 3(b)).

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