Abstract
In agroecosystems, different cropping patterns cause changes in soil physicochemical properties and thus in microbial communities, which in turn affect crop yields. In this study, the yields of soybean continuous cropping for 5 years (C5), 10 years (C10), and 20 years (C20) and of soybean-corn rotational cropping (R) treatments were determined, and samples of the tillage layer soil were collected. High-throughput sequencing technology was used to analyze the diversity and composition of the soil bacterial and fungal communities. The factors influencing microbial communities, along with the effects of these communities and those of soil chemical indexes on yield, were further evaluated. The results showed that the community richness index of bacteria was higher in C20 than in R and that of fungi was highest in C5. The differences in the bacterial and fungal communities diversity indexes were not significant among the different continuous cropping treatments, respectively. The soil microbial community composition of all continuous cropping treatments differed significantly from R. The dominant bacterial phylum was Actinobacteriota and the dominant fungal phylum was Ascomycota. The relative abundance of Fusarium did not differ significantly among the continuous cropping treatments, while that of the plant pathogen fungi Lectera sp., Plectosphaerella sp., and Volutella sp. increased with continuous cropping years. Soil pH, SOM, N, and TP had significant effects on both bacterial and fungal communities, and TK and C/N had highly significant effects on fungal communities. The yield of C5 was significantly lower than that of R, and the differences in yield between C10, C20, and R were not significant. TN, TP, and pH had significant effects on yield, and fungal community abundance had a greater negative effect on yield than bacterial community abundance.
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Claims 13
Claim · model-written summary
Bacterial richness was higher after 20 years of continuous soybean than in rotation.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- C20e0
- Outcome
- community richness index of bacteriae0
- Direction
- highere0
- Comparator
- Re0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“community richness index of bacteria was higher in C20 than in R”
t0“Soybean”
Claim · model-written summary
Fungal richness was highest after five years of continuous cropping.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- C5e0
- Outcome
- that of fungie0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that of fungi was highest in C5”
t0“Soybean”
Claim · model-written summary
Bacterial and fungal diversity indexes did not differ significantly among continuous cropping treatments.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- different continuous cropping treatmentse0
- Outcome
- bacterial and fungal communities diversity indexese0
- Comparator
- different continuous cropping treatmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences in the bacterial and fungal communities diversity indexes were not significant among the different continuous cropping treatments”
t0“Soybean”
Claim · model-written summary
Soil microbial composition differed significantly between continuous cropping and rotation.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- all continuous cropping treatmentse0
- Outcome
- soil microbial community compositione0
- Direction
- differede0
- Comparator
- Re0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil microbial community composition of all continuous cropping treatments differed significantly from R”
t0“Soybean”
Claim · model-written summary
Actinobacteriota was the dominant bacterial phylum and Ascomycota the dominant fungal phylum.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- dominant bacterial phylum was Actinobacteriota and the dominant fungal phylum was Ascomycotae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dominant bacterial phylum was Actinobacteriota and the dominant fungal phylum was Ascomycota”
t0“Soybean”
Claim · model-written summary
Fusarium abundance did not differ significantly among continuous cropping treatments.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- continuous cropping treatmentse0
- Outcome
- relative abundance of Fusariume0
- Direction
- did not differe0
- Comparator
- continuous cropping treatmentse0
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative abundance of Fusarium did not differ significantly among the continuous cropping treatments”
t0“Soybean”
Claim · model-written summary
Lectera sp., Plectosphaerella sp. and Volutella sp. increased with years of continuous cropping.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- continuous cropping yearse0
- Second interactor
- Plectosphaerella sp.Plectosphaerellae0pathogen
- Outcome
- plant pathogen fungi Lectera sp., Plectosphaerella sp., and Volutella sp.e0
- Direction
- increasede0
- Qualifier
- Volutella sp.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant pathogen fungi Lectera sp., Plectosphaerella sp., and Volutella sp. increased with continuous cropping years”
t0“Soybean”
Claim · model-written summary
Soil pH, SOM, N and TP significantly affected bacterial and fungal communities.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- bacterial and fungal communitiese0
- Setting
- Soile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil pH, SOM, N, and TP had significant effects on both bacterial and fungal communities”
t0“Soybean”
Claim · model-written summary
TK and C/N highly significantly affected fungal communities.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- fungal communitiese0
- Setting
- TK and C/Ne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TK and C/N had highly significant effects on fungal communities”
t0“Soybean”
Claim · model-written summary
Five years of continuous cropping significantly reduced soybean yield relative to rotation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of C5 was significantly lower than that of R”
t0“Soybean”
Claim · model-written summary
Yield under C10 and C20 did not differ significantly from rotation.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- C10, C20e0
- Outcome
- yielde0
- Comparator
- Re0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences in yield between C10, C20, and R were not significant”
t0“Soybean”
Claim · model-written summary
TN, TP and pH significantly affected yield.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- yielde0
- Setting
- TN, TP, and pHe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TN, TP, and pH had significant effects on yield”
t0“Soybean”
Claim · model-written summary
Fungal community abundance had a greater negative effect on yield than bacterial community abundance.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- yielde0
- Direction
- negativee0
- Comparator
- bacterial community abundancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fungal community abundance had a greater negative effect on yield than bacterial community abundance”
t0“Soybean”
The same questions in other papers
rotation · Fusarium · Glycine max (soybean)Positive and negative results
2 reporting no difference from an alternative
- positive
- positive
rotation · soil: biology · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
1 paper more in this group
See all 5 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.