Abstract
PHOSPHATE solubilizing capacity of four strains, Pseudomonas fluorescence, Bacillus megaterium, Serratia marcescens, and Bacillus subtilis was assessed in liquid National Botanical Research Institute’s phosphate medium containing rock phosphate (RP). A greenhouse pot experiment was conducted to evaluate the effects of inoculation with arbuscular mycorrhizal (AM) fungi alone or in combination with each strain with and without RP on wheat (Triticum aestivum Gemeza-9) growth, yield, nutrient uptake and the activity of alkaline phosphatase. The amounts of P released from RP by bacterial strains ranged from 0.22 to 80.8mg P L-1 and the pH values of the cultures were reduced from initial value of 7.3 to values varied between 4.04 and 6.62. The results indicated that B. subtilis was the most effective strain in solubilizing RP in liquid culture. The combined inoculation with bacterial strains and AM fungi led to a significant increase in soil P content and alkaline phosphatase activity compared with both the non-inoculated and the individually inoculated soil, and this increase was much higher after 69 days comparing with those after 130 days. In RP-amended soil, B. subtilis and P. fluorescence were more effective in increasing NPK uptake of wheat straw and grains compared with S. marcescens and B. megaterium when inoculated with AM fungi. This study is concluded that the combined inoculation plus RP gave better results for wheat grown in sandy soil. Further researches are required to estimate this study under field conditions and different soils to give reliable results.
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Claims 6
Claim · model-written summary
B. subtilis was the most effective strain at solubilizing rock phosphate in liquid culture.
- Taxon
- wheat
Triticum aestivumt0 - Outcome
- solubilizing RPe0
- Direction
- most effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. subtilis was the most effective strain in solubilizing RP in liquid culture”
t0“Effects of Phosphate Solubilizing Microorganisms on Wheat Yield and Phosphatase Activity”
Claim · model-written summary
Combined bacterial and AM fungal inoculation significantly increased soil phosphorus content and alkaline phosphatase activity relative to uninoculated and individually inoculated soil.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- combined inoculation with bacterial strains and AM fungie0
- Interactor
- AM fungiGlomeromycotae0symbiont
- Outcome
- soil P content and alkaline phosphatase activitye0
- Direction
- increasee0
- Comparator
- non-inoculated and the individually inoculated soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined inoculation with bacterial strains and AM fungi led to a significant increase in soil P content and alkaline phosphatase activity compared with both the non-inoculated and the individually inoculated soil”
t0“Effects of Phosphate Solubilizing Microorganisms on Wheat Yield and Phosphatase Activity”
Claim · model-written summary
The inoculation-associated soil increases were greater after 69 days than after 130 days.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- this increasee0
- Direction
- highere0
- Qualifier
- after 69 dayse0
- Comparator
- after 130 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this increase was much higher after 69 days comparing with those after 130 days”
t0“Effects of Phosphate Solubilizing Microorganisms on Wheat Yield and Phosphatase Activity”
Claim · model-written summary
In rock phosphate amended soil with AM fungi, B. subtilis increased wheat straw and grain NPK uptake more effectively than S. marcescens and B. megaterium.
- Taxon
- wheatTriticum aestivume0
- Treatment
- B. subtilise0
- Interactor
- AM fungiGlomeromycotae0symbiont
- Outcome
- NPK uptake of wheat straw and grainse0
- Direction
- increasinge0
- Comparator
- S. marcescens and B. megateriume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In RP-amended soil, B. subtilis and P. fluorescence were more effective in increasing NPK uptake of wheat straw and grains compared with S. marcescens and B. megaterium when inoculated with AM fungi”
Claim · model-written summary
In rock phosphate amended soil with AM fungi, P. fluorescence increased wheat straw and grain NPK uptake more effectively than S. marcescens and B. megaterium.
- Taxon
- wheatTriticum aestivume0
- Treatment
- P. fluorescencee0
- Interactor
- AM fungiGlomeromycotae0symbiont
- Outcome
- NPK uptake of wheat straw and grainse0
- Direction
- increasinge0
- Comparator
- S. marcescens and B. megateriume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In RP-amended soil, B. subtilis and P. fluorescence were more effective in increasing NPK uptake of wheat straw and grains compared with S. marcescens and B. megaterium when inoculated with AM fungi”
Claim · model-written summary
The authors conclude that combined inoculation plus rock phosphate gives better results for wheat in sandy soil.
- Taxon
- wheatTriticum aestivume0
- Treatment
- combined inoculation plus RPe0
- Outcome
- better resultse0
- Setting
- sandy soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combined inoculation plus RP gave better results for wheat grown in sandy soil”
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