Bio-activation of waste mica through potassium solubilizing bacteria and rice residue

KHUSHBOO RANI; DIPAK RANJAN BISWAS; RANJAN BHATTACHARYYA; SUNANDA BISWAS; TAPAS KUMAR DAS; KALI KINKAR BANDYOPADHYAY; RAJEEV KAUSHIK

doi:10.56093/ijas.v92i1.120843

Authors

KHUSHBOO RANI ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
DIPAK RANJAN BISWAS ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
RANJAN BHATTACHARYYA ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
SUNANDA BISWAS ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
TAPAS KUMAR DAS ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
KALI KINKAR BANDYOPADHYAY ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India
RAJEEV KAUSHIK ICAR-Indian Agricultural Research Institute, New Delhi 110 012, India

https://doi.org/10.56093/ijas.v92i1.120843

Keywords:

Mica, Potassium, Potassium solubilizing bacteria, Rice residue, Wheat yield

Abstract

This article aims to demonstrate the increase in availability of potassium (K) from mica through bio-activation using different strains of potassium solubilizing bacteria (KSB) and rice residue incorporation and comparing it with standard K-fertilizer i.e. muriate of potash (MOP). The effects of mica, rice residue and KSB on wheat biomass yield, K uptake and available K in soil were assessed through a pot culture study at research farm of ICAR-Indian Agricultural Research Institute, New Delhi (2019). Results reveal that mica application @ 50 and 100 mg/kg soil significantly improved the biomass yield and K uptake by wheat as compared to treatments without mica application. Rice residue incorporation @ 2 g/kg soil had significant role in improvement of biomass yield, K uptake by wheat and available K in soil as compared to no residue treatments. Amongst the two isolated strains of KSB (JHKSB1 and JHKSB4) and one standard strain (Bacillus sp.), all were found equally effective in improving K availability from mica to the wheat crop. Mica, bio-activated via rice residue and KSB was able to improve relative agronomic efficiency and per cent K recovery from soil but it was not as effective as MOP. Thus, inherent K content in mica may be available to crops partly after bio-activation and it can be applied in conjunction with MOP for meeting the K requirement of the crop.

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References

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