Effects of Carrier Materials and Storage Temperatures on the Viability and Stability of Three Biofertilizer Inoculants Obtained from Potato ( Solanum tuberosum L.) Rhizosphere

Becky Nancy Aloo, Ernest Rashid Mbega, Billy Amendi Makumba and John Baptist Tumuhairwe
Additional contact information
Becky Nancy Aloo: Department of Biological Sciences, University of Eldoret, Eldoret P.O. Box 1125-30100, Kenya
Ernest Rashid Mbega: Department of Sustainable Agriculture and Biodiversity Conservation, Nelson Mandela African Institution of Science and Technology, Arusha P.O. Box 447, Tanzania
Billy Amendi Makumba: Department of Biological Sciences, Moi University, Eldoret P.O. Box 3900-30100, Kenya
John Baptist Tumuhairwe: Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala P.O. Box 7062, Uganda

Agriculture, 2022, vol. 12, issue 2, 1-12

Abstract: Biofertilizer technology continues to be derailed by the short shelf life of inoculants. The present study investigated the suitability of wheat-bran (WB), rice-husks (RH), farmyard-manure (FYM), bagasse (BG), and sawdust (SD) in the formulation of potato-derived Klebsiella grimontii (MPUS7), Serratia marcescens (NGAS9), and Citrobacter freundii (LUTT5) under refrigerated (8 °C) and room (25 ± 2 °C) storage. The physicochemical properties of the materials were assessed before sterilization and introduction of the inoculants and assessment of their viability for 8 months. Most of the physicochemical properties of the materials varied significantly ( p < 0.05). Bagasse supported the maximum growth of MPUS7 (5.331 log CFU g −1 ) under refrigeration and LUTT5 (4.094 log CFU g −1 ) under both conditions. Under room storage, the maximum growth of MPUS7 (3.721 log CFU g −1 ) occurred in WB. Formulations that remained viable under room storage can easily be integrated into existing agricultural distribution systems that lack refrigeration.

Keywords: rhizobacteria; carrier materials; biofertilizer; bioformulations; shelf-life (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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