Abstract
The potential benefits of biochar, a carbon-rich substance derived from biomass, for enhancing agricultural yield and soil health have drawn increasing interest. Nevertheless, owing to the lack of specialized studies, the role of its poly-spatial structure in the success of fostering plant growth remains unclear. This study aimed to assess the effects of various biochar pore shapes on tobacco growth and the underlying microbiological processes. Three pyrolysis temperatures (250 °C, 400 °C, and 550 °C) were used to produce biochar from tobacco stems, resulting in different pore structures (T3 > T2 > T1). We then used BET-specific surface area (BET), t.Plot micropore specific surface area (t.Plot), mesopore specific surface area (MSSA), specific pore volume (SPV), average pore size (AP), and mesopore pore volume (MPV) measurements to evaluate the effects of these biochars on tobacco growth and biomass accumulation, and microbial analyses were performed to investigate the underlying mechanisms. When applied to plants, biochar increased their growth compared to untreated controls. The most notable improvement in tobacco growth was observed in the biochar produced at 400 °C (T3), which possessed the largest and most advantageous pore structure among all treatments. Further studies demonstrated that biochars with greater specific surface areas (BET, t.Plot, and MSSA) positively altered the abundance of key microbial taxa (e.g., Stenotrophobacter, Ensifer, Claroideoglomus) and community composition, thereby encouraging plant development and biomass accumulation. Conversely, greater pore volumes (SPV, AP, and MPV) inhibited microbial activity and significantly affected growth and biomass accumulation. Structural equation modeling further demonstrated that the pore structure of biochar greatly affected plant growth by changing the relative abundance and community composition of soil microbes. Maximizing the benefits of biochar in stimulating plant growth and improving soil microbial communities depends on optimizing the material’s pore structure, particularly by increasing the specific surface area. These findings will help expand the use of biochar in sustainable agriculture.
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Claims 8
Claim · model-written summary
Biochar increased plant growth relative to untreated controls.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Treatment
- biochare0
- Outcome
- growthe0
- Direction
- increasede0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When applied to plants, biochar increased their growth compared to untreated controls.”
t0“Tobacco”
Claim · model-written summary
Biochar produced at 400 °C produced the greatest tobacco growth improvement.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- biochar produced at 400 °C (T3)e0
- Outcome
- tobacco growthe0
- Direction
- most notable improvemente0
- Comparator
- all treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most notable improvement in tobacco growth was observed in the biochar produced at 400 °C (T3), which possessed the largest and most advantageous pore structure among all treatments.”
t0“Tobacco”
Claim · model-written summary
Greater biochar specific surface area positively changed the abundance of key microbial taxa.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- biochars with greater specific surface arease0
- Interactor
- StenotrophobacterStenotrophobactere0
- Outcome
- abundance of key microbial taxae0
- Direction
- positively alterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further studies demonstrated that biochars with greater specific surface areas (BET, t.Plot, and MSSA) positively altered the abundance of key microbial taxa (e.g., Stenotrophobacter, Ensifer, Claroideoglomus) and community composition, thereby encouraging plant development and biomass accumulation.”
t0“Tobacco”
Claim · model-written summary
Greater biochar specific surface area positively changed microbial community composition.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- biochars with greater specific surface arease0
- Outcome
- community compositione0
- Direction
- positively alterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further studies demonstrated that biochars with greater specific surface areas (BET, t.Plot, and MSSA) positively altered the abundance of key microbial taxa (e.g., Stenotrophobacter, Ensifer, Claroideoglomus) and community composition, thereby encouraging plant development and biomass accumulation.”
t0“Tobacco”
Claim · model-written summary
Greater biochar pore volumes inhibited microbial activity.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- greater pore volumese0
- Outcome
- microbial activitye0
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conversely, greater pore volumes (SPV, AP, and MPV) inhibited microbial activity and significantly affected growth and biomass accumulation.”
t0“Tobacco”
Claim · model-written summary
Greater biochar pore volumes significantly affected growth and biomass accumulation, with direction unstated.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- greater pore volumese0
- Outcome
- growth and biomass accumulatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conversely, greater pore volumes (SPV, AP, and MPV) inhibited microbial activity and significantly affected growth and biomass accumulation.”
t0“Tobacco”
Claim · model-written summary
A structural equation model indicated biochar pore structure affects plant growth through changes in soil microbes.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- pore structure of biochare0
- Outcome
- plant growthe0
- Qualifier
- changing the relative abundance and community composition of soil microbese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Structural equation modeling further demonstrated that the pore structure of biochar greatly affected plant growth by changing the relative abundance and community composition of soil microbes.”
t0“Tobacco”
Claim · model-written summary
The authors recommend optimizing biochar pore structure by increasing specific surface area to stimulate growth and improve soil microbial communities.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- optimizing the material’s pore structure, particularly by increasing the specific surface areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximizing the benefits of biochar in stimulating plant growth and improving soil microbial communities depends on optimizing the material’s pore structure, particularly by increasing the specific surface area.”
t0“Tobacco”
The same questions in other papers
biochar · growth · Nicotiana tabacum (tobacco)Results agree
14 papers in the same direction as this paper
- positive
- positive
- positive
11 papers more in this group
See all 15 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.