Abstract
Biochar-based fertilizers have the potential to improve soil quality by enhancing soil microbial communities, yet their direct effects on crop yield and quality are not well understood. To address this gap, we conducted a pot-based field study to evaluate the impact of traditional chemical fertilizers alone, traditional fertilizers supplemented with biochar, and biochar-based fertilizers on soil properties and bacterial communities. We also investigated how these treatments affected tobacco ( Nicotiana tabacum ) yield and leaf aroma quality. Biochar-based fertilizers increased soil carbon (C) and nitrogen (N) pools compared to the control, leading to greater bacterial diversity and richness. Consequently, tobacco biomass increased from 449 g/pot to 517 g/pot, and leaf aroma content rose from 625 µg/g to 832 µg/g. Linear discriminant analysis and partial least squares path modeling identified 13 key bacterial phylotypes, including plant growth-promoting bacteria (PGPB) such as Burkholderiaceae, Novosphingobium, Bacillus, Chitinophagaceae, Sphingomonas, Acidobacteriaceae, Acidobacteria, and Flavobacterium, that positively influenced tobacco leaf aroma constituents. Our findings suggest that biochar and biochar-based fertilizers enhance soil bacterial communities, which in turn improve crop yield and product quality. This study highlights the potential of biochar-based fertilizers as a sustainable agricultural practice to enhance soil health and crop quality through microbial community modulation. • Biochar-based fertilizer enhanced the soil C and nitrogen pools which is directly affected PGPB growth. • Biochar-based fertilizer effectively improved tobacco aroma-related content. • Tobacco aroma components can be affected by the promotion of key phylotypes belonging to PGPR.
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Claims 5
Claim · model-written summary
Biochar-based fertilizers increased soil carbon and nitrogen pools relative to control.
- Taxon
- tobacco
Nicotiana tabacume1 - Treatment
- Biochar-based fertilizerse0
- Outcome
- soil carbon (C) and nitrogen (N) poolse0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biochar-based fertilizers increased soil carbon (C) and nitrogen (N) pools compared to the control”
e1“tobacco ( Nicotiana tabacum ) yield”
Claim · model-written summary
Biochar fertilizer led to greater bacterial diversity and richness.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- Biochar-based fertilizerse0
- Outcome
- bacterial diversity and richnesse0
- Direction
- greatere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biochar-based fertilizers increased soil carbon (C) and nitrogen (N) pools compared to the control, leading to greater bacterial diversity and richness.”
e1“tobacco ( Nicotiana tabacum ) yield”
Claim · model-written summary
Tobacco biomass increased from 449 to 517 g per pot with biochar-based fertilizer.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Biochar-based fertilizerse1
- Outcome
- tobacco biomasse0
- Direction
- increasede0
- Value
- 517 g/pote0
- Qualifier
- 449 g/pote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Consequently, tobacco biomass increased from 449 g/pot to 517 g/pot”
e1“Biochar-based fertilizers increased soil carbon (C) and nitrogen (N) pools”
Claim · model-written summary
Tobacco leaf aroma content rose from 625 to 832 micrograms per gram.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- Biochar-based fertilizerse2
- Outcome
- leaf aroma contente0
- Direction
- rosee0
- Value
- 832 µg/ge0
- Qualifier
- 625 µg/ge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf aroma content rose from 625 µg/g to 832 µg/g.”
e1“tobacco ( Nicotiana tabacum ) yield”
e2“Biochar-based fertilizers increased soil carbon (C) and nitrogen (N) pools”
Claim · model-written summary
Thirteen bacterial phylotypes were identified as positive influences on tobacco leaf aroma constituents.
- Taxon
- tobaccoNicotiana tabacume0
- Interactor
- plant growth-promoting bacteria (PGPB)e0symbiont
- Outcome
- tobacco leaf aroma constituentse0
- Direction
- positively influencede0
- Value
- 13e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“identified 13 key bacterial phylotypes, including plant growth-promoting bacteria (PGPB) such as Burkholderiaceae, Novosphingobium, Bacillus, Chitinophagaceae, Sphingomonas, Acidobacteriaceae, Acidobacteria, and Flavobacterium, that positively influenced tobacco leaf aroma constituents.”
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