Legume Research

  • Chief EditorJ. S. Sandhu

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Legume Research, volume 43 issue 5 (october 2020) : 658-664

Efficacies of freshly isolated phosphate solubilising bacteria (PSB) on growth promotion in groundnut (Arachis hypogaea L.) upon commonly used PSB biofertilizers in eastern India

Amrita Sengupta, Sunil Kumar Gunri, Tapas Biswas, Jayanta Saha
1Faculty of Agriculture Bidhan Chandra KrishiViswavidyalaya, Mohanpur-741 252, Nadia, West Bengal, India.
  • Submitted22-03-2018|

  • Accepted04-08-2018|

  • First Online 20-09-2018|

  • doi 10.18805/LR-4020

Cite article:- Sengupta Amrita, Gunri Kumar Sunil, Biswas Tapas, Saha Jayanta (2018). Efficacies of freshly isolated phosphate solubilising bacteria (PSB) on growth promotion in groundnut (Arachis hypogaea L.) upon commonly used PSB biofertilizers in eastern India. Legume Research. 43(5): 658-664. doi: 10.18805/LR-4020.
Present study was designed to assess the prospect of fresh phosphate solubilizing bacterial isolates (PSB), to ones, used as PSB-biofertilizer in growth promotion of groundnut (Arachis hypogaea L.). Phosphate-solublizing index (PSI) of 17 isolates varied from 1.692 to 3.033, after seven days incubation. Tricalcium phosphate solubilization by PSB ranged from 309.72 to 615.28 ìg/ml and highest value was recorded for isolate JCA-5. Three most efficient fresh isolates were clustered under the genera Burkholderia, Bacillus and Brevibacillus. The supplementation of elite PSB isolates augmented growth and P-uptake irrespective of edaphic conditions for groundnut. Steady increments in root (22.6% and 25.5%) and shoot length (27.6% and 33.7%), root dry-weight (20.3% and 16.2%),shoot dry-weight (11.3% and 23.3%) and P-uptake (30% and 67%) of groundnut was evident in red-laterite soil and new alluvial soils respectively in comparison to the  previously acknowledged PSB biofertilizers. 
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