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| Titel |
Evaluation of Varying Biochars as Carrier Materials for Bacterial Soil Inoculants |
| VerfasserIn |
Lauren Hale, David Crowley |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094475
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| Publikation (Nr.) |
 EGU/EGU2014-9885.pdf |
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| Zusammenfassung |
| The incorporation of biochar into agricultural soils for carbon sequestration and improved
soil fertility creates an opportunity to simultaneously deliver plant-growth promoting
rhizobacteria (PGPR). Many characteristics of biochar materials indicate that these particles
could be conducive as inoculum carriers. This could provide a value-added component for
biochar marketing and has an advantage over traditional carrier materials, which can
be unsustainable or expensive to produce. Here, we assessed the suitability of 10
biochar types, made from 5 feedstocks at 2 pyrolysis temperatures (300°C and
600°C), to serve as carriers for 2 model PGPR strains, Enterobacter cloacae UW5 and
Pseudomonas putida UW4. All biochars were characterized based on BET specific surface
area, C-N content, pH, EC, and their abilities to adsorb bacterial cells from a liquid
inoculum. Further studies incorporated qPCR to quantify the survival of inoculants after
introduction into soils via biochar carriers. The biochars that performed well were further
assayed for their influence on PGPR traits, 1-aminocyclopropane-1-carboxylate
(ACC) deaminase and auxin production. Peat and vermiculite served as traditional
carrier materials to which we compared the biochars. Our findings indicated that
biochars varied in their interactions with our model PGPR strains. Based on our
analysis several biochar types were able to serve as carriers which were as good, if
not better than, the traditional carrier materials. Future work should seek to assess
shelf life and varying inoculation methods for the biochar-inoculant complexes. |
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