Characterization of Biochar Prepared from Cotton Stalks as Efficient Inoculum Carriers for Bacillus subtilis SL-13

Siyuan, Tao; Wu, Zhansheng; He, Xiufang; Ye, Bang‐Ce; Li, Chun

doi:10.15376/biores.13.1.1773-1786

Cited by 25 publications

(12 citation statements)

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“…Biochar might serve as a suitable carrier material for PGPR or bio-control agents 66 , 75 . Moreover, with an added advantage of enhanced survivability, multiplication and colonization in porous spaces of biochar 77 , makes it an ideal candidate for the development of bio-control formulation for commercial applications.…”

Section: Discussionmentioning

confidence: 99%

Role of biochar, compost and plant growth promoting rhizobacteria in the management of tomato early blight disease

Rasool

Akhter

Soja

et al. 2021

Sci Rep

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The individual role of biochar, compost and PGPR has been widely studied in increasing the productivity of plants by inducing resistance against phyto-pathogens. However, the knowledge on combined effect of biochar and PGPR on plant health and management of foliar pathogens is still at juvenile stage. The effect of green waste biochar (GWB) and wood biochar (WB), together with compost (Comp) and plant growth promoting rhizobacteria (PGPR; Bacillus subtilis) was examined on tomato (Solanum lycopersicum L.) physiology and Alternaria solani development both in vivo and in vitro. Tomato plants were raised in potting mixture modified with only compost (Comp) at application rate of 20% (v/v), and along with WB and GWB at application rate of 3 and 6% (v/v), each separately, in combination with or without B. subtilis. In comparison with WB amended soil substrate, percentage disease index was significantly reduced in GWB amended treatments (Comp + 6%GWB and Comp + 3%GWB; 48.21 and 35.6%, respectively). Whereas, in the presence of B. subtilis disease suppression was also maximum (up to 80%) in the substrate containing GWB. Tomato plant growth and physiological parameters were significantly higher in treatment containing GWB (6%) alone as well as in combination with PGPR. Alternaria solani mycelial growth inhibition was less than 50% in comp, WB and GWB amended growth media, whereas B. subtilis induced maximum inhibition (55.75%). Conclusively, the variable impact of WB, GWB and subsequently their concentrations in the soil substrate was evident on early blight development and plant physiology. To our knowledge, this is the first report implying biochar in synergism with PGPR to hinder the early blight development in tomatoes.

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Section: Discussionmentioning

confidence: 99%

Role of biochar, compost and plant growth promoting rhizobacteria in the management of tomato early blight disease

Rasool

Akhter

Soja

et al. 2021

Sci Rep

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“…These act as chemical signals that induce cell lysis and biofilm formation, and promote interaction pathways that condition the adaptation and survival of bacterial species (Bueno et al 2018). For example, the growth rate of Bacillus subtilis SL-13 in NB medium increased with the addition of biochar, because it contains nutrients for the growth of these bacteria and the special porous structure of the biochar has a positive effect on the adsorption of bacteria, being a potentially suitable carrier of PGPR for agriculture (Tao et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Diversity of bacterial strains in biochar-enhanced Amazon soil and their potential for growth promotion and biological disease control in tomato

et al. 2020

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The use of bacteria in growth promotion and biological control of plant diseases can minimize environmental contamination caused by the indiscriminate use of pesticides and chemical fertilizers. We aimed to evaluate growth promotion and biological control of Corynespora cassiicola in tomato seedlings mediated by beneficial bacteria isolated from a non-rhizospheric Amazon soil containing different amounts of biochar, and to identify to which groups of bacteria the strains belong. We obtained 200 strains of bacteria from experimental plots containing biochar doses of 0, 40, 80 and 120 t ha-1. Of these, 53 strains were selected by root colonization tests. Based on growth promotion parameters, 25 strains were screened, identified by molecular characterization and evaluated for indoleacetic acid (IAA) production, phosphate solubilization and biological control. The best dose of biochar for colony formation was 40 t ha-1, and a regression model indicated 34 t ha-1 as the optimal dose. The production of IAA was observed in 18 (75%) strains, and two (8%) strains were able to solubilize phosphate. The efficiency in root growth promotion was up to 125%, and the percentage of plant protection ranged from 50 to 59%. Molecular characterization showed that the bacteria used in this study belong to the genera Bacillus and Lysinibacillus.

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“…It could be explained that maybe due to the different surface area of these two sizes of biochar, however the difference was not much significant. Contact area between the biochar and the microbial sludge was, probably one of the most important factors in the adsorption process [21]. As seen in Fig.…”

Section: Effect Of Biochar Particles Size and Biochar Dose On Microbial Sludge Adsorptionmentioning

confidence: 94%

“…This result indicated that CFH 350 could enhance the growth of microbial sludge in the logarithmic phase due to the retained nutrients on surface of biochar and biochar could be used together with activated sludge in one reactor in order to improve the treatment efficiency. Some recent research indicated that the addition of biochar and activated carbon had no effect on the microbial community of granules and there were likely that biochars accelerated the granulation of activated sludge through physical interactions (affecting the physical characteristic of activated sludge) [17,21,22].…”

Section: Effect Of Cfh 350 Dose On Growth Curve Of Microbial Sludgementioning

confidence: 99%

A Study on Combination of Biochar and Activated Sludge for Removing Ammonium From Low C/N Ratio Wastewater

2020

JST

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Grey domestic wastewater from septic tank contains high nitrogen content and low C/N ratio. Therefore, the aerobic biological treatment is often not effective for ammonium and nitrogen removal. The aim of this work was to study the performance of nitrogen removal and production of aerobic granular sludge using biochar produced from coffee husk pyrolyzed at 350oC as biocarrier. It was performed under the lab-scale SBR systems. Low C/N ratio domestic wastewater was used for this work. Coffee husk biochar (CFH 350) was added into the systems at different dosage. As a result, the biochar made from coffee husk pyrolyzed at low temperature promoted the adhesion of sludge onto biochar surface. The particles size of biochar played an important role for adsorption and adhesion capacity of activated sludge on biochar. The growth rate of bacterial sludge was accelerated and higher than control sample when biochar was used with biochar dose of 15 g/L. Though nitrification rate was improved as the bacterial sludge was accelerated, however, at initial stage, the removal efficiency of COD and total nitrogen was not as high as compare to traditional activated aerobic sludge system.

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Characterization of Biochar Prepared from Cotton Stalks as Efficient Inoculum Carriers for Bacillus subtilis SL-13

Cited by 25 publications

References 0 publications

Role of biochar, compost and plant growth promoting rhizobacteria in the management of tomato early blight disease

Role of biochar, compost and plant growth promoting rhizobacteria in the management of tomato early blight disease

Diversity of bacterial strains in biochar-enhanced Amazon soil and their potential for growth promotion and biological disease control in tomato

A Study on Combination of Biochar and Activated Sludge for Removing Ammonium From Low C/N Ratio Wastewater

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