EVALUATION OF SHELF LIFE AND QUALITY OF CARRIER AND LIQUID BASED BIOFERTILIZERS

K. SHRAVANI¹*, S. TRIVENI², P.C. LATHA³, K. DAMODARA CHARI^4
1Department of Agricultural Microbiology & Bioenergy, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, 500030, Telangana, India
²Department of Agricultural Microbiology & Bioenergy, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, 500030, Telangana, India
³Senior scientist, ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad, 500030, Telangana, India
⁴Assistant Scientific Officer (Microbiology), National Institute of Plant Health Management, Department of Agriculture & Cooperation of the Ministry of Agriculture, Govt. of India, Rajendranagar, Hyderabad, 500030, Telangana, India
* Corresponding Author : shravani4335@gmail.com

Received : 02-06-2019     Accepted : 12-06-2019     Published : 30-06-2019
Volume : 11     Issue : 6       Pages : 1598 - 1601
Int J Microbiol Res 11.6 (2019):1598-1601

Keywords : Biofertilizers, Microbial population, Viable count, Quality
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Agricultural Microbiology & Bioenergy, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, 500030, Telangana
Author Contribution : All authors equally contributed

In carrier-based inoculants, peat, wood charcoal and lignite are used as carriers and these inoculants suffer from poor quality, high contamination and unpredictable field performance. Whereas, Liquid biofertilizers of good quality hold great promise in agriculture. It contains special cell protectants or substances that encourage the formation of resting spores or cysts for longer shelf life and protect the cells against seed toxicity after seed application. In the present study, carrier and liquid based Biofertilizers (Rhizobium & PSB) were obtained from different firms to evaluate their quality. The shelf life of biofertilizers was estimated using suitable media for viable count. Microbial population of beneficial bacteria in carrier and liquid based Biofertilizers was monitored at monthly intervals. The microbial analysis revealed that there was a decreased in the population (viable count) and contamination of carried based biofertilizers was more when compared to liquid based biofertilizers. The carrier based biofertilizers maintained constant viable count only first three months when compared to liquid it is maintained up to five to six months.

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