Abstract
BACKGROUND: Intercropping, an essential cultivation pattern in modern agricultural systems, increases crop yields and soil quality. Cassava and peanut intercropping systems exhibit advantages in solar utilization and cadmium absorption, etc. However, the inner mechanisms need to be elucidated. In this study, Illumina MiSeq platform was used to reveal the rhizospheric microbes and soil quality in cassava/peanut intercropping systems, and the results provided a reference for the application of this method in studying other intercropping systems. RESULTS: Both intercropping cassava/peanut (IP) and intercropping peanut/cassava (IC) systems significantly increased available N, available K, pH value, and urease activity, comparing with that in monocropping cassava (MC) and monocropping peanut (MP) system. However, there were few effects on the total N, total P, total K, available P, organic matter, protease activity, catalase activity, sucrase activity, and acid phosphatase activity. Both IP and MP soils contained more bacteria and fungi than those in the IC and MC soils, which were mainly made of Proteobacteria and Actinobacteria. Intercropping remarkably increased the number of Nitrospirae in IP and IC soils comparing those in MC and MP soils. Redundancy analysis (RDA) revealed that the abundances of DA101, Pilimelia, and Ramlibacter were positively correlated to the soil quality. These results suggest that intercropping enhances the available nitrogen content of soil through increasing the quantity of rhizospheric microbes, especially that of DA101 and Pilimelia. CONCLUSIONS: The cassava/peanut intercropping system improves soil quality through increasing the available nitrogen content and abundance of DA101, Pilimelia, and Ramlibacter in the soil.
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Claims 8
Claim · model-written summary
Both intercropping arrangements significantly increased available N, available K and pH relative to monocropping.
- Taxon
- cassava/peanut
Arachis hypogaea
Manihot esculentae0 - Treatment
- intercropping cassava/peanut (IP) and intercropping peanut/cassava (IC)e0
- Outcome
- available N, available K, pH valuee0
- Direction
- increasede0
- Comparator
- monocropping cassava (MC) and monocropping peanut (MP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both intercropping cassava/peanut (IP) and intercropping peanut/cassava (IC) systems significantly increased available N, available K, pH value, and urease activity, comparing with that in monocropping cassava (MC) and monocropping peanut (MP) system.”
Claim · model-written summary
Both intercropping arrangements significantly increased soil urease activity.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae0
- Treatment
- intercropping cassava/peanut (IP) and intercropping peanut/cassava (IC)e0
- Outcome
- urease activitye0
- Direction
- increasede0
- Comparator
- monocropping cassava (MC) and monocropping peanut (MP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both intercropping cassava/peanut (IP) and intercropping peanut/cassava (IC) systems significantly increased available N, available K, pH value, and urease activity, comparing with that in monocropping cassava (MC) and monocropping peanut (MP) system.”
Claim · model-written summary
Intercropping had few effects on total nutrients, available P, organic matter and several enzyme activities.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae1
- Treatment
- intercroppinge1
- Outcome
- total N, total P, total K, available P, organic matter, protease activity, catalase activity, sucrase activity, and acid phosphatase activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were few effects on the total N, total P, total K, available P, organic matter, protease activity, catalase activity, sucrase activity, and acid phosphatase activity.”
e1“intercropping cassava/peanut”
Claim · model-written summary
IP and MP soils had more bacteria and fungi than IC and MC soils.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae1
- Outcome
- bacteria and fungie0
- Direction
- moree0
- Comparator
- IC and MC soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both IP and MP soils contained more bacteria and fungi than those in the IC and MC soils”
e1“cassava/peanut intercropping systems”
Claim · model-written summary
Proteobacteria and Actinobacteria were dominant in those soils.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae1
- Outcome
- Proteobacteria and Actinobacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which were mainly made of Proteobacteria and Actinobacteria”
e1“cassava/peanut intercropping systems”
Claim · model-written summary
Intercropping increased Nitrospirae in IP and IC relative to monocropped soils.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae1
- Treatment
- Intercroppinge0
- Outcome
- number of Nitrospiraee0
- Direction
- increasede0
- Comparator
- MC and MP soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intercropping remarkably increased the number of Nitrospirae in IP and IC soils comparing those in MC and MP soils.”
e1“cassava/peanut intercropping systems”
Claim · model-written summary
DA101, Pilimelia and Ramlibacter abundances correlated positively with soil quality.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae1
- Interactor
- DA101e0other
- Outcome
- soil qualitye0
- Direction
- positivelye0
- Qualifier
- Pilimelia, and Ramlibactere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the abundances of DA101, Pilimelia, and Ramlibacter were positively correlated to the soil quality”
e1“cassava/peanut intercropping systems”
Claim · model-written summary
Authors suggest intercropping raises available soil nitrogen by increasing rhizosphere microbes, especially DA101 and Pilimelia.
- Taxon
- cassava/peanutArachis hypogaeaManihot esculentae1
- Treatment
- intercroppinge0
- Outcome
- available nitrogen content of soile0
- Direction
- enhancese0
- Qualifier
- through increasing the quantity of rhizospheric microbes, especially that of DA101 and Pilimeliae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping enhances the available nitrogen content of soil through increasing the quantity of rhizospheric microbes, especially that of DA101 and Pilimelia”
e1“cassava/peanut intercropping systems”
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