Natural compounds enhancing growth and survival of rhizobial inoculants in vermicompost-based formulations

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...

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Bibliographic Details
Published in:Biology and fertility of soils 2010-06, Vol.46 (5), p.521-524
Main Authors: Kalra, Alok, Chandra, Mahesh, Awasthi, Ashutosh, Singh, Anil K, Khanuja, Suman Preet S
Format: Article
Language:English
Subjects:
Agriculture
Bacteria
Biomedical and Life Sciences
Calliterpenone
Carrier
Charcoal
Composting
Cow urine
Legumes
Life Sciences
Plant growth
Rhizobium
Rhizobium meliloti
Short Communication
Soil fertility
Soil microorganisms
Soil Science & Conservation
Vermicompost
Vermicomposting
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Summary: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.
ISSN:0178-2762
1432-0789
DOI:10.1007/s00374-010-0443-2