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Studies on potassium solubilizing bacteria

KrishiKosh

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Title Studies on potassium solubilizing bacteria
 
Creator D.S.Archana
 
Contributor V.P.Savalgi
 
Subject Agricultural Microbiology
 
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.
 
Date 2016-10-17T11:36:42Z
2016-10-17T11:36:42Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/80688
 
Format application/pdf
 
Publisher UAS, Dharwad