Studies on potassium solubilizing bacteria
KrishiKosh
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Title |
Studies on potassium solubilizing bacteria
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Creator |
D.S.Archana
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Contributor |
V.P.Savalgi
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Subject |
Agricultural Microbiology
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Description |
Attempts were made to isolate potassium solubilizing bacteria from rhizosphere soil of different crops from Dharwad and Belgaum districts. A total of 30 bacteria isolates were tested for K solubilization and characterized upto genus level based on morphological and biochemical characters. The mechanisms involved in K soluiblization and other agronomical beneficial traits were also analyzed for selected efficient strains. In vitro K solubilization by bacteria ranged from 2.41 μg/ml to 44.49 μg/ml. Oxalic acid, citric acid were the chief organic acids produced by the KSB isolates. All the isolates tested for other beneficial traits like solubilization of insoluble phosphate and production of growth promoting substance. The amount of Pi released by the isolates from TCP ranged from 5.72 to 12.27 per cent. The amount of IAA produced by the strains ranged from 1.10 to 16.50 and that of GA ranged from 0.60 to 3.29 μg/ 25 ml broth. Nine efficient gram positive K soluiblizing bacteria were also examined for their influence on growth, K uptake and yield of maize plants under glass house condition. All the inoculated treatment with bacteria were found to increase growth parameters and yield components compare to absolute control and 25 per cent of RDK control Bacillus sp. KSB 11 recorded the highest yield (51.33 g/plant) and other parameters followed by KSB 62 and KSB 42. Three strains of present study viz., KSB 11, KSB 62 and KSB 42 showed high potential among the KSB isolates. Thus it can be inferred that potassium solubilizing bacteria have the potential to use as bioinoculants. |
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Date |
2016-10-17T11:36:42Z
2016-10-17T11:36:42Z 2007 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/80688
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Format |
application/pdf
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Publisher |
UAS, Dharwad
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