Abstract
Cucumber is an important cash crop; however, continuous cropping obstacles readily occur within the intensive production processes of facility horticulture. This study aimed to determine the effects of continuous cropping on soil quality and the microbial community in the rhizosphere soil of cucumbers. Rhizosphere soil of cucumber planted continuously for 4, 8, and 12 years was investigated, and soil that was not continuously planted was used as the control. Soil physicochemical properties, enzyme activity, microbial diversity, and richness were determined. The results showed that with the increase in continuous cropping years (0, 4, 8, and 12 years), soil total salt content continuously increased, while the pH value significantly decreased. Compared with the control, soil organic matter, alkali-hydrolyzed nitrogen, available phosphorus, available potassium, and nitrate nitrogen contents increased significantly after 4 and 8 years of continuous cropping. Spearman correlation analysis showed that pH was negatively correlated with sucrase or sucrose and available phosphorus was positively correlated with alkaline phosphatase. Compared with the control, the diversity and abundance of bacterial and fungal communities in cucumber rhizosphere soil decreased after 4 and 12 years of continuous cropping. Continuous cropping led to a significant increase in the richness of the dominant phylum of cucumber rhizosphere soil. Principal coordinates analysis showed that, compared with the control, the soil microbial community structure was significantly separated after 4, 8, and 12 years of continuous cropping, and the microbial community structure was most similar after 4 and 8 years of continuous cropping. In addition, redundancy analysis showed that pH was the main driver of soil microbial dominance. In conclusion, continuous cropping of cucumber along the Yellow River irrigation area has led to the deterioration of soil nutrients and microbial communities in that region. This experiment provides a theoretical foundation for addressing the challenges associated with continuous cropping in cucumber cultivation.
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Claims 14
Claim · model-written summary
Soil total salt content increased continuously with years of continuous cucumber cropping.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- continuous cropping yearse1
- Outcome
- soil total salt contente1
- Direction
- continuously increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“with the increase in continuous cropping years (0, 4, 8, and 12 years), soil total salt content continuously increased”
t0“cucumber”
Claim · model-written summary
Soil pH value significantly decreased with years of continuous cucumber cropping.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous cropping yearse1
- Outcome
- pH valuee1
- Direction
- significantly decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“with the increase in continuous cropping years (0, 4, 8, and 12 years), soil total salt content continuously increased, while the pH value significantly decreased”
t0“cucumber”
Claim · model-written summary
Soil organic matter increased significantly after 4 and 8 years of continuous cucumber cropping relative to control.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge3
- Outcome
- soil organic mattere2
- Direction
- increasede3
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Compared with the control, soil organic matter”
e3“increased significantly after 4 and 8 years of continuous cropping”
t0“cucumber”
Claim · model-written summary
Alkali-hydrolyzed nitrogen increased significantly after 4 and 8 years of continuous cucumber cropping relative to control.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge3
- Outcome
- alkali-hydrolyzed nitrogene4
- Direction
- increasede3
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Compared with the control, soil organic matter”
e3“increased significantly after 4 and 8 years of continuous cropping”
e4“alkali-hydrolyzed nitrogen”
t0“cucumber”
Claim · model-written summary
Available phosphorus increased significantly after 4 and 8 years of continuous cucumber cropping relative to control.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge3
- Outcome
- available phosphoruse5
- Direction
- increasede3
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Compared with the control, soil organic matter”
e3“increased significantly after 4 and 8 years of continuous cropping”
e5“available phosphorus, available potassium”
t0“cucumber”
Claim · model-written summary
Available potassium increased significantly after 4 and 8 years of continuous cucumber cropping relative to control.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge3
- Outcome
- available potassiume5
- Direction
- increasede3
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Compared with the control, soil organic matter”
e3“increased significantly after 4 and 8 years of continuous cropping”
e5“available phosphorus, available potassium”
t0“cucumber”
Claim · model-written summary
Nitrate nitrogen increased significantly after 4 and 8 years of continuous cucumber cropping relative to control.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge3
- Outcome
- nitrate nitrogene6
- Direction
- increasede3
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Compared with the control, soil organic matter”
e3“increased significantly after 4 and 8 years of continuous cropping”
e6“nitrate nitrogen contents”
t0“cucumber”
Claim · model-written summary
Soil pH was negatively correlated with sucrase or sucrose activity.
- Taxon
- cucumberCucumis sativust0
- Treatment
- pHe7
- Outcome
- sucrase or sucrosee7
- Direction
- negatively correlatede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“pH was negatively correlated with sucrase or sucrose”
t0“cucumber”
Claim · model-written summary
Available phosphorus was positively correlated with alkaline phosphatase.
- Taxon
- cucumberCucumis sativust0
- Treatment
- available phosphoruse0
- Outcome
- alkaline phosphatasee0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“available phosphorus was positively correlated with alkaline phosphatase”
t0“cucumber”
Claim · model-written summary
Bacterial and fungal community diversity and abundance decreased in rhizosphere soil after 4 and 12 years of continuous cucumber cropping.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- continuous croppinge1
- Outcome
- diversity and abundance of bacterial and fungal communitiese1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the diversity and abundance of bacterial and fungal communities in cucumber rhizosphere soil decreased after 4 and 12 years of continuous cropping”
t0“cucumber”
Claim · model-written summary
Continuous cucumber cropping significantly increased the richness of the dominant rhizosphere phylum.
- Taxon
- cucumberCucumis sativuse2
- Treatment
- Continuous croppinge2
- Outcome
- richness of the dominant phylume2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Continuous cropping led to a significant increase in the richness of the dominant phylum of cucumber rhizosphere soil”
t0“cucumber”
Claim · model-written summary
Soil microbial community structure was significantly separated from control after 4, 8 and 12 years of continuous cucumber cropping.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge3
- Outcome
- soil microbial community structuree3
- Direction
- significantly separatede3
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“compared with the control, the soil microbial community structure was significantly separated after 4, 8, and 12 years of continuous cropping”
t0“cucumber”
Claim · model-written summary
Soil microbial community structure was most similar to control after 4 and 8 years of continuous cucumber cropping.
- Taxon
- cucumberCucumis sativust0
- Treatment
- continuous croppinge4
- Outcome
- microbial community structuree4
- Direction
- most similare4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the microbial community structure was most similar after 4 and 8 years of continuous cropping”
t0“cucumber”
Claim · model-written summary
Soil pH was the main driver of soil microbial dominance in the cucumber soils.
- Taxon
- cucumberCucumis sativust0
- Treatment
- pHe5
- Outcome
- soil microbial dominancee5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“redundancy analysis showed that pH was the main driver of soil microbial dominance”
t0“cucumber”
The same questions in other papers
rotation · soil: biology · Cucumis sativus (cucumber)Positive and negative results
5 in the opposite direction
- positive
- positive
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2 papers more in this group
See all 6 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.