Abstract
Tobacco continuous cropping is prevalent in intensive tobacco agriculture but often leads to microbial community imbalance, soil nutrient deficiency, and decreased crop productivity. While the tobacco-rape rotation has demonstrated significant benefits in increasing tobacco yield. Microorganisms play a crucial role in soil nutrient cycling and crop productivity. However, the internal mechanism of tobacco-rape rotation affecting tobacco yield through microbe-soil interaction is still unclear. In this study, two treatments, tobacco continuous cropping (TC) and tobacco-rape rotation (TR) were used to investigate how planting systems affect soil microbial diversity and community structure, and whether these changes subsequently affect crop yields. The results showed that compared with TC, TR significantly increased the Shannon index, Chao1 index, ACE index of bacteria and fungi, indicating increased microbial α-diversity. On the one hand, TR may directly affect the bacterial and fungal community structure due to the specificity of root morphology and root exudates in rape. Compared with TC, TR significantly increased the proportion of beneficial bacterial and fungal taxa while significantly reduced soil-borne pathogens. Additionally, TR enhanced the scale and complexity of microbial co-occurrence networks, promoting potential synergies between bacterial OTUs. On the other hand, TR indirectly changed microbial community composition by improving soil chemical properties and changing microbial life history strategies. Compared with TC, TR significantly increased the relative abundance of copiotrophs while reduced oligotrophs. Notably, TR significantly increased tobacco yield by 39.6% compared with TC. The relationships among yield, microbial community and soil chemical properties indicated that planting systems had the greatest total effect on tobacco yield, and the microbial community, particularly bacteria, had the greatest direct effect on tobacco yield. Our findings highlighted the potential of tobacco-rape rotation to increase yield by both directly and indirectly optimizing microbial community structure.
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Claims 9
Claim · model-written summary
Rotation increased bacterial and fungal alpha diversity indices relative to continuous tobacco.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- TRe0
- Outcome
- Shannon index, Chao1 index, ACE index of bacteria and fungie0
- Direction
- increasede0
- Comparator
- TCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with TC, TR significantly increased the Shannon index, Chao1 index, ACE index of bacteria and fungi, indicating increased microbial α-diversity”
t0“tobacco-rape rotation”
Claim · model-written summary
Rotation increased beneficial bacterial and fungal taxa.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- TRe0
- Interactor
- bacterial and fungal taxae0symbiont
- Outcome
- proportion of beneficial bacterial and fungal taxae0
- Direction
- increasede0
- Comparator
- TCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with TC, TR significantly increased the proportion of beneficial bacterial and fungal taxa”
t0“tobacco-rape rotation”
Claim · model-written summary
Rotation reduced soil-borne pathogens.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- TRe0
- Interactor
- soil-borne pathogense0pathogen
- Outcome
- soil-borne pathogense0
- Direction
- reducede0
- Comparator
- TCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with TC, TR significantly increased the proportion of beneficial bacterial and fungal taxa while significantly reduced soil-borne pathogens”
t0“tobacco-rape rotation”
Claim · model-written summary
Rotation increased microbial network scale and complexity.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- TRe0
- Interactor
- microbiale0symbiont
- Outcome
- scale and complexity of microbial co-occurrence networkse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TR enhanced the scale and complexity of microbial co-occurrence networks”
t0“tobacco-rape rotation”
Claim · model-written summary
Rotation increased copiotroph abundance.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- TRe0
- Interactor
- copiotrophse0other
- Outcome
- relative abundance of copiotrophse0
- Direction
- increasede0
- Comparator
- TCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with TC, TR significantly increased the relative abundance of copiotrophs”
t0“tobacco-rape rotation”
Claim · model-written summary
Rotation reduced oligotrophs.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- TRe0
- Interactor
- oligotrophse0other
- Outcome
- oligotrophse0
- Direction
- reducede0
- Comparator
- TCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with TC, TR significantly increased the relative abundance of copiotrophs while reduced oligotrophs”
t0“tobacco-rape rotation”
Claim · model-written summary
Rotation increased tobacco yield by 39.6% relative to continuous cropping.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- TRe0
- Outcome
- tobacco yielde0
- Direction
- increasede0
- Value
- 39.6%e0
- Comparator
- TCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TR significantly increased tobacco yield by 39.6% compared with TC”
Claim · model-written summary
Planting systems had the greatest total effect on tobacco yield in the relationship analysis.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- planting systemse0
- Outcome
- tobacco yielde0
- Direction
- greatest total effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting systems had the greatest total effect on tobacco yield”
Claim · model-written summary
The microbial community, especially bacteria, had the greatest direct effect on tobacco yield.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- tobacco yielde0
- Direction
- greatest direct effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the microbial community, particularly bacteria, had the greatest direct effect on tobacco yield”
The same questions in other papers
rotation · yield · Nicotiana tabacum (tobacco)Positive and negative results
15 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
16 papers more in this group
See all 20 papers →rotation · pest · Nicotiana tabacum (tobacco)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.