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Isolation of potassium solubilizing bacteria and their inoculation effect on growth of wheat (Triticum aestivum L. em. thell.)

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Title Isolation of potassium solubilizing bacteria and their inoculation effect on growth of wheat (Triticum aestivum L. em. thell.)
 
Creator Parmar, Priyanka
 
Contributor Sindhu, S.S.
 
Subject Ginger,Tillage equipment, Agreements, Land resources, Costs, Crops, Productivity, Economics, Area, Manpower
 
Description In the present study, seventy bacterial isolates obtained from wheat rhizosphere and 67 reference
strains from the department were tested for potassium solubilization ability on Aleksandrov medium
supplemented with mica as potassium source. Twenty isolates/strains solubilized potassium from mica
and the amount of K released by the isolates/strains ranged from 15 mg/L to 48 mg/L. Maximum K
solubilization occurred with glucose as carbon source, at 25°C temperature of incubation, 7.0 pH of the
medium and with KCl as potassium source followed by K2SO4. Isolate HWP47 caused solubilization
of potassium in mica only by acid production, isolates HWP28 and HWP69 by production of CPS and
EPS, HWP38 by production of acid and CPS whereas isolates HWP15, HWP17, HWP53, HWP 57,
HWP61 and HWP63 caused solubilization by production of acid, CPS and EPS. Inoculation of K
solubilizing isolate HWP47 in wheat (Triticum aestivum L.) variety WH711 caused 51.46% increase in
RDW in soil and 60.19% increase when rock material was added in pots at 60 days after sowing.
Similarly, 44.28% increase in SDW was found in HWP47 inoculated plants. At 90 days after sowing,
the inoculation of rhizobacterial isolate HWP15 caused 15.29% and 27.19% increase in RDW and
SDW, respectively. The plant dry weight gain was further enhanced to 20.59% and 71.92% in RDW
and SDW, respectively with amendment of rock material. Inoculation with isolate HWP47 showed
22.35% increase in RDW and 73.68% increase in SDW on addition of rock material. Isolates HWP15
and HWP47 also caused significant K uptake in the shoot tissues. Thus, potassium solubilizing bacteria
HWP15 and HWP47 could be further exploited for plant growth improvement under field conditions.
 
Date 2016-11-08T13:51:32Z
2016-11-08T13:51:32Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/84440
 
Language en
 
Format application/pdf
 
Publisher CCSHAU