Natural compounds enhancing growth and survival of rhizobial inoculants in vermicompost-based formulations |
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| Authors: | Alok Kalra Mahesh Chandra Ashutosh Awasthi Anil K Singh Suman Preet S Khanuja |
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| Institution: | (1) Division of Field Laboratories and Organic Farming, Central Institute of Medicinal and Aromatic Plants, (Council of Scientific and Industrial Research), Lucknow, 226015, Uttar Pradesh, India |
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| Abstract: | The present study demonstrates the usefulness of natural microbial growth-promoting compounds for improving the stability
and life of vermicompost-based (both granular and its aqueous extract) bioformulations. Granular vermicompost maintained the
number of cells of Rhizobium meliloti Rmd 201 up to 5.9 × 108 after 180 days at 28°C compared with 2.1 × 108 in charcoal (powdered), while aqueous extract of the vermicompost supported the 5.6 × 107 rhizobia numbers even after 270 days. The addition of 25 μL/mL cow urine and 0.01 mM calliterpinone, a natural plant growth
promoter, increased the rhizobia number significantly in granular vermicompost and its aqueous extract, respectively. |
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