scholarly journals The variable charge of andisols as affected by nanoparticles of rock phosphate and phosphate solubilizing bacteria

2018 ◽  
Author(s):  
M. Arifin ◽  
N. Nurlaeny ◽  
R. Devnita ◽  
B. N. Fitriatin ◽  
A. Sandrawati ◽  
...  
Keyword(s):  
Rock Phosphate ◽  
Phosphate Solubilizing Bacteria ◽  
Variable Charge ◽  
Phosphate Solubilizing

scholarly journals ROCK PHOSPHATE SOLUBILIZATION AND ENZYMATIC ACTIVITIES FROM INDIGENOUS BACTERIA ON CASSAVA MILL EFFLUENT CONTAMINATED SOIL

2020 ◽  
Vol 1 (2) ◽  
pp. 37-51
Author(s):  
C. E. Oshoma ◽  
S. O. Nwodo ◽  
I. S. Obuekwe
Keyword(s):  
Acid Phosphatase ◽  
Contaminated Soil ◽  
Rock Phosphate ◽  
Phosphate Solubilization ◽  
Enzymatic Activities ◽  
Available Phosphorus ◽  
Phosphate Solubilizing Bacteria ◽  
Indigenous Bacteria ◽  
Rock Phosphate Solubilization ◽  
Phosphate Solubilizing

The processing of cassava into value-added products is associated with discharge of effluents which contain substances that have adverse effect on the environment. Remediative activity of indigenous bacteria can be stimulated by supplementing effluents with phosphorus. Rock phosphate (RP) solubilization and enzymatic activities from bacteria on the cassava mill effluents (CME) contaminated soil was investigated. Soil mixed with varying concentrations of CME (0, 100, 200, 300, 400, 500 and 600 ml) and 10 g of RP were analyzed on days 0 and 16. Parameters analyzed were changes in pH, heterotrophic bacteria load, phosphate-solubilizing bacteria load, available phosphorus, acid phosphatase, cellulase and urease concentrations. The results showed that the medium containing 400 ml CME contaminated soil had the highest phosphate-solubilizing bacteria load (12.60 ± 2.08 x 106 cfu/ml), available phosphorus (126.00 ± 4.08 mg/kg), acid phosphatase (9.54 ± 0.51 mgN/g/min), cellulase (15.24 ± 0.81 mg/g/6h) and urease concentration (2.15±0.22 mg/g/2h). The control had the lowest phosphate-solubilizing bacteria load and enzymatic activity. Biostimulation of indigenous bacteria to enhance the degradation of cassava mill effluent-contaminated soil, using rock phosphate, showed promising results. This implies that rock phosphate solubilization by indigenous bacteria in CME-contaminated soils could be important for the remediation and reclamation of contaminated lands.

PHOSPHATE-SOLUBILIZING BACTERIA AND FUNGI IN VARIOUS CULTIVATED AND VIRGIN ALBERTA SOILS

1983 ◽  
Vol 63 (4) ◽  
pp. 671-678 ◽  
Author(s):  
R. M. N. KUCEY
Keyword(s):  
Calcium Phosphate ◽  
Rock Phosphate ◽  
Solution Culture ◽  
Phosphate Solubilizing Bacteria ◽  
Southern Alberta ◽  
Fungal Populations ◽  
Phosphate Solubilizing ◽  
Bacteria And Fungi ◽  
Fungi Imperfecti ◽  
Total P

Seventeen sites throughout southern Alberta were sampled in the spring of 1981. Total and NaHCO3-extractable phosphorus and soil texture were determined for each soil sampled. Phosphate-solubilizing and total bacterial and fungal populations were determined by serial dilution and plate counting. Available P constituted an average of 1% of the total P present in the soils. Phosphate-solubilizing bacteria and fungi made up 0.5 and 0.1%, respectively, of the total bacterial and fungal populations. A highly significant correlation was found between the numbers of total and phosphate-solubilizing fungi and the levels of total P in the soil. As a group, the fungi were superior to bacteria in solubilizing both freshly precipitated calcium phosphate and Idaho rock phosphate. Fungi also retained this ability over many subculturing transfers. A high percentage of the bacterial isolates lost their solubilizing ability when subcultured. A significant correlation was found between an organism’s ability to solubilize freshly precipitated calcium phosphate in agar plates and Idaho rock phosphate in solution culture. Key words: Fungi imperfecti, Penicillium sp., phosphate-solubilizing microorganisms

scholarly journals The Role of Rock Phosphate and Farm Yard Manure Combined-Phosphate-Solubilizing Bacteria in Increasing Nutrient Uptake and Soybean Yield

2005 ◽  
Vol 7 (2) ◽  
pp. 41-47
Author(s):  
Aidi Noor
Keyword(s):  
Nutrient Uptake ◽  
Rock Phosphate ◽  
Block Design ◽  
Maximum Yield ◽  
Phosphate Solubilizing Bacteria ◽  
Farm Yard Manure ◽  
Optimum Dosage ◽  
Two Factors ◽  
Phosphate Solubilizing

The aims of the experiment were to evaluate the effect of rock phosphate application and combination betweenphosphate-solubilizing bacteria with farm yard manure on nutrient uptake and yield of soybean. Factorial experiment design with two factors was used in randomized complzte block design with three replications. The first factors was level of rockphosphate i.e. : 0; 30; 60; 90 kg P ha· I, and the second factor was combination of phosphate solubili=ing bacteria andfarm yard manure: without phosphate solubi/i=ing bacteria andfarm yard manure; phosphate solubilbing bacteria (Pseudomonas fluorescens); farm yard manure 10 ton ha"I, and phosphate solubilizing bacteria + farm yard manure. The results indicated that rock phosphate and combination of phosphate solubilizing bacteria andfarm yard manure application increased nutrient (N, p, K) uptake and grain yield of soybean. Optimum dosage of rock phosphate in soil without phosphate-solubilizing bacteria andfarm yard manure (control) was 72.15 kg P hdl which gave maximum yield of soybean was 7.73 g pori. While with phosphate-solubilizing bacteria. farm yard manure and phosphate solubilizing bacteria+farm yard manure obtained optimum dosage of rock phosphate were 62.26, 63.94, and 62. 21 kg P hd1 , respectively, which gave maximum yield of soybean were 8.17, 7.95, and 8.43 g pori, respectively.

Effect of irrigation, pyrites and phosphobacteria on the efficiency of rock phosphate applied to lentils

1983 ◽  
Vol 101 (2) ◽  
pp. 467-472 ◽  
Author(s):  
S. N. Sharma ◽  
S. B. Ray ◽  
S. L. Pandey ◽  
R. Prasad
Keyword(s):  
Lens Culinaris ◽  
Rock Phosphate ◽  
Agricultural Research ◽  
Indian Agricultural Research Institute ◽  
Residual Effects ◽  
New Delhi ◽  
Phosphate Solubilizing Bacteria ◽  
Maize Crop ◽  
Phosphate Solubilizing ◽  
North Western

SUMMARYA field experiment was made at the Indian Agricultural Research Institute, New Delhi, during the autumn-spring season of crop years 1979–80 and 1980–1 to study the effects of irrigation, pyrites and phosphobacteria on the efficiency of Mussoorie rock phosphate(north-western Himalayan deposits) for lentils (Lens culinaris Medic), and residual effects were studied in maize (Zea mays L.). Response to phosphate was observed only when the crop received irrigation. Mussoorie rock phosphate was only 40·5% as effective as ordinary superphosphate; its efficiency was increased to 50·4% when it was mixed with 25% (by weight) pyrites. When the lentil seeds were treated with the culture of Pseudomonas striata (phosphate solubilizing bacteria) the efficiency of rock phosphate was increased to 79·7%. Rock phosphate together with seed treatment with phosphobacteria also showed residual effects on the succeeding maize crop which were equal to those obtained with ordinary superphosphate. Our results thus show that use of phosphobacteria can considerably increase the efficiency of rock phosphate on neutral soils.

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