Nutrient supplementation of pinewood biochar for use as a bacterial inoculum carrier

Sun, Daquan; Hale, Lauren; Crowley, David E.

doi:10.1007/s00374-016-1093-9

Cited by 86 publications

(40 citation statements)

References 36 publications

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“…Compared to the culture incubated with untreated seed, B. mucilaginosus grew more rapidly with the biochar-adsorbed cells as the inoculum, and the biomass was increased by 48.3% when B. mucilaginosus was fermented for 18 h. The result indicated that cells released from biochar gained better growth activity than free cells did. The similar promotion in growth activity was also observed differentially on the other tested bacteria (data not shown) [19].…”

Section: The Correlation Between Adsorption Ability Of Biochar and Basupporting

confidence: 75%

Strain-Specific Effects of Biochar and Its Water-Soluble Compounds on Bacterial Growth

et al. 2019

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Previous studies have revealed that biochar could induce the disturbance of a microbial community above the family level. So far, very little is known about how individual bacteria are affected by biochar at genus or species levels. In this study, effects of biochar and its water-soluble compounds on the growth of individual soil bacteria were examined. Biochar derived from different feedstock showed disproportionate impacts on bacterial growth. Corncob biochar could significantly stimulate the growth of most tested strains, whereas the growth of four strains, including Bacillus pumilus ACCC04306 (Agricultural Culture Collection of China, ACCC), B. licheniformis, B. cereus, and Kitasatospora viridis, were inhibited by addition of rice husk biochar. All the biochars greatly supported the growth of B. mucilaginosus but inhibited that of K. viridis. More importantly, different strains exhibited discrepant growth response towards the same biochar sample, even when strains belong to the same species, suggesting that the effect of biochar on bacteria growth is strain-specific. Corncob biochar showed the strongest adsorption on B. thuringiensis but the greatest growth promotion was observed in B. mucilaginosus, indicating that the porous structure of biochar is not the sole factor that influences cell growth. Due to the possible stimulation or inhibition of water-soluble compounds existing in biochar, the growth variation of tested strains decreased or increased correspondingly when the washed biochar was applied, indicating that water-soluble compounds in fresh biochar play an important role in cell growth and such effect is also strain-dependent. Biochar application could also enhance potassium-/phosphate-solubilizing activities through promoting bacterial growth. All these results suggested that biochar might influence bacterial growth under different mechanisms. Our findings should be valuable for an in-depth understanding of the potential mechanism of soil bacteria changes following biochar incorporation and for biochar application in agriculture.

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Section: The Correlation Between Adsorption Ability Of Biochar and Basupporting

confidence: 75%

Strain-Specific Effects of Biochar and Its Water-Soluble Compounds on Bacterial Growth

et al. 2019

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“…In another study, additional nutrient supplements to pinewood biochar used as an inoculum carrier did not further promote shelf life or inoculum efficiency of Pseudomonas putida UW4. Furthermore, nutrients additions alone were not effective to promote colonization of inoculants in the rhizosphere as compared to biochar without supplements [42]. Thus, biochar itself may provide nutrient sources for survival and proliferation of inocula.…”

mentioning

confidence: 83%

Biochar-based Bradyrhizobium inoculum improves growth of lupin (Lupinus angustifolius L.) under drought stress

Egamberdieva

Reckling

Wirth

2017

European Journal of Soil Biology

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“…Some examples of biochar based bacterial inoculants and their effect on plant growth are given in Table 1. Sun et al (2016) evaluated the survival and root colonization potential of Pseudomonas putida in pinewood biochar that was produced by pyrolysis at 600 °C. They found that biochar was effective as an inoculum carrier and supported a high population of bacteria, and the strain was able to effectively colonize the rhizosphere of plants which resulted in increased plant biomass.…”

Section: Applications Of Biochar-based Microbial Inoculantsmentioning

confidence: 99%

Potential effects of biochar-based microbial inoculants in agriculture

Egamberdieva

Reckling

et al. 2018

Environmental Sustainability

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Biochar has been used widely as a soil amendment to improve plant growth, nutrient acquisition, stress tolerance and to improve soil biological, chemical and physical properties. Several studies suggest biochar as a carrier for bacterial inoculants under various climatic and environmental conditions because of the properties that favour microbial life. Biochar is rich in organic carbon, contains nutrients, such as N, P, K, has a high porosity, and high water-holding capacity. In this review, we synthesise results on the effectiveness of biochar as a carrier for inoculum in pot and field conditions. Biochar as a carrier supported a high survival rate of introduced bacteria and significantly increased colonization in the plant rhizosphere. Soil microbes are known to play an essential role in soil biochemical processes, and nutrient cycles; improve plant stress tolerance, and nutrient acquisition through their ability to fix atmospheric nitrogen, solubilize phosphate, or by enhancing decomposition of plant residues. Moreover, biochar-based inoculants increased root and shoot biomass, nodulation and nutrient uptake of plants in pot and field experiments. Biochar-based inoculants were also effective in enhancing plant growth and grain yield in pot and field experiments. These studies demonstrate that biochar can be considered as a suitable carrier or formulation of bacterial inoculants even in hostile environments and might contribute to replace other commercially used materials successfully. Biochar-based rhizobial inoculants can significantly improve the symbiotic performance of legumes with rhizobia which may reduce N fertilizer demand and thus promote the sustainability of crop production.

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Nutrient supplementation of pinewood biochar for use as a bacterial inoculum carrier

Cited by 86 publications

References 36 publications

Strain-Specific Effects of Biochar and Its Water-Soluble Compounds on Bacterial Growth

Strain-Specific Effects of Biochar and Its Water-Soluble Compounds on Bacterial Growth

Biochar-based Bradyrhizobium inoculum improves growth of lupin (Lupinus angustifolius L.) under drought stress

Potential effects of biochar-based microbial inoculants in agriculture

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