Abstract
The continuous planting of soybeans leads to soil acidification, aggravation of soil-borne diseases, reduction in soil enzyme activity, and accumulation of toxins in the soil. Microorganisms in the rhizosphere play a very important role in maintaining the sustainability of the soil ecosystem and plant health. In this study, two soybean genotypes, one bred for continuous cropping and the other not, were grown in a Mollisol in northeast China under continuous cropping for 7 and 36years in comparison with soybean–maize rotation, and microbial communities in the rhizosphere composition were assessed using high-throughput sequencing technology. The results showed that short- or long-term continuous cropping had no significant effect on the rhizosphere soil bacterial alpha diversity. Short-term continuous planting increased the number of soybean cyst nematode ( Heterodera glycines ), while long-term continuous planting reduced these numbers. There were less soybean cyst nematodes in the rhizosphere of the tolerant genotypes than sensitive genotypes. In addition, continuous cropping significantly increased the potential beneficial bacterial populations, such as Pseudoxanthomonas , Nitrospira , and Streptomyces compared to rotation and short-term continuous cropping, suggesting that long-term continuous cropping of soybean shifts the microbial community toward a healthy crop rotation system. Soybean genotypes that are tolerant to soybean might recruit some microorganisms that enhance the resistance of soybeans to long-term continuous cropping. Moreover, the network of the two genotypes responded differently to continuous cropping. The tolerant genotype responded positively to continuous cropping, while for the sensitive genotype, topology analyses on the instability of microbial community in the rhizosphere suggested that short periods of continuous planting can have a detrimental effect on microbial community stability, although this effect could be alleviated with increasing periods of continuous planting.
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Claims 8
Claim · model-written summary
Continuous cropping duration did not significantly affect soybean rhizosphere bacterial alpha diversity.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- short- or long-term continuous croppinge0
- Outcome
- rhizosphere soil bacterial alpha diversitye0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short- or long-term continuous cropping had no significant effect on the rhizosphere soil bacterial alpha diversity”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
Claim · model-written summary
Short-term continuous planting increased soybean cyst nematode numbers.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Short-term continuous plantinge0
- Interactor
- Heterodera glycines
Heterodera glycinese0pest - Outcome
- number of soybean cyst nematodee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term continuous planting increased the number of soybean cyst nematode ( Heterodera glycines )”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
Claim · model-written summary
Long-term continuous planting reduced soybean cyst nematode numbers.
- Taxon
- soybeanGlycine maxe1
- Treatment
- long-term continuous plantinge0
- Interactor
- Heterodera glycinesHeterodera glycinese1pest
- Outcome
- soybean cyst nematodee1
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while long-term continuous planting reduced these numbers”
e1“soybean cyst nematode ( Heterodera glycines )”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
Claim · model-written summary
The tolerant soybean genotype had fewer cyst nematodes in its rhizosphere than the sensitive genotype.
- Taxon
- soybeanGlycine maxt0
- Material
- tolerant genotypese0
- Interactor
- soybean cyst nematodesHeterodera glycinese0pest
- Outcome
- soybean cyst nematodese0
- Direction
- lesse0
- Comparator
- sensitive genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were less soybean cyst nematodes in the rhizosphere of the tolerant genotypes than sensitive genotypes”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
Claim · model-written summary
Continuous cropping increased potentially beneficial rhizosphere bacteria compared with rotation and short-term continuous cropping.
- Taxon
- soybeanGlycine maxt0
- Treatment
- continuous croppinge0
- Interactor
- Pseudoxanthomonas , Nitrospira , and StreptomycesNitrospira
StreptomycesPseudoxanthomonase0other - Outcome
- potential beneficial bacterial populationse0
- Direction
- increasede0
- Comparator
- rotation and short-term continuous croppinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“continuous cropping significantly increased the potential beneficial bacterial populations, such as Pseudoxanthomonas , Nitrospira , and Streptomyces compared to rotation and short-term continuous cropping”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
Claim · model-written summary
The two soybean genotype microbial networks responded differently to continuous cropping.
- Taxon
- soybeanGlycine maxt0
- Treatment
- continuous croppinge0
- Outcome
- network of the two genotypese0
- Direction
- differentlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the network of the two genotypes responded differently to continuous cropping”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
Claim · model-written summary
The tolerant genotype network responded positively to continuous cropping.
- Taxon
- soybeanGlycine maxt0
- Material
- tolerant genotypee0
- Treatment
- continuous croppinge0
- Outcome
- tolerant genotypee0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tolerant genotype responded positively to continuous cropping”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
Claim · model-written summary
Short periods of continuous planting destabilized the sensitive genotype rhizosphere microbial community, with attenuation over longer periods.
- Taxon
- soybeanGlycine maxt0
- Material
- sensitive genotypee0
- Treatment
- short periods of continuous plantinge0
- Outcome
- microbial community stabilitye0
- Direction
- detrimental effecte0
- Qualifier
- alleviated with increasing periods of continuous plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the sensitive genotype, topology analyses on the instability of microbial community in the rhizosphere suggested that short periods of continuous planting can have a detrimental effect on microbial community stability, although this effect could be alleviated with increasing periods of continuous planting”
t0“Soybean Genotypes Respond Differently to Long-Term Continuous Cropping in Mollisols”
e1“soybean cyst nematode ( Heterodera glycines )”
The same questions in other papers
rotation · Heterodera glycines · Glycine max (soybean)Positive and negative results
12 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- no effect
13 papers more in this group
See all 17 papers →rotation · ecology: diversity · Glycine max (soybean)Results agree
3 papers in the same direction as this paper
- negative
- no effect
- no effect
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.