Reduction of Chemical Potassic Source of Fertilizer by Integrating Potash Solubilising Bacteria in Sali Rice
Ipsita Ojah*
Krishi Vigyan Kendra, Darrang, Assam Agricultural University, Assam (784 146), India
Debasish Borah
IFSR, AICRP-IFS, Assam Agricultural University, Jorhat, Assam (785 013), India
Abdul Hafiz
Krishi Vigyan Kendra, Darrang, Assam Agricultural University, Assam (784 146), India
Pallavi Deka
Krishi Vigyan Kendra, Udalguri, Assam Agricultural University, Assam (784 514), India
Himadri Rabha
Krishi Vigyan Kendra, Udalguri, Assam Agricultural University, Assam (784 514), India
DOI: https://doi.org/10.54083/ResBio/6.4.2024/144-150
Keywords: Fertilizer, Integrated nutrient management, Oryza sativa, Potash solubilizing bacteria (KSB), Sali rice, Yield
Abstract
The study here entitled “Reduction of Chemical Potassic Source of Fertilizer by Integrating Potash Solubilising Bacteria in Sali Rice” was carried out by Krishi Vigyan Kendra (KVK) of Udalguri under Assam Agricultural University, Assam. The demonstrations were conducted at farmer’s plot at different villages of Udalguri district during Kharif seasons of 2020-21 and 2021-22, to measure the effect of continuous application of inorganic fertilizers along with organic nutrients on crop productivity, economics, soil fertility and plant health. The integration of Potash-Solubilizing Bacteria (KSB) with a 50% reduction in potassic fertilizer application resulted in an average grain yield of 46 and 45 q ha-1, across two consecutive years, demonstrating a 5.45% yield improvement over conventional fertilization. Soil potassium availability improved significantly, with increased organic carbon, cation exchange capacity and microbial activity. The economic analysis revealed a higher benefit-cost (B:C) ratio of 2.1 in KSB-treated plots compared to 1.37 in conventional farmer’s practices, indicating the cost-effectiveness of biofertilizer-based Integrated Nutrient Management (INM). These results enlighten the potential of KSB in reducing chemical input dependency while maintaining the sustainable rice productivity.
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Reference
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