Impacts of different ecological types of earthworm on aggregate distribution and stability in typical latosolic red and red soils

CUI Yingying; WU Jialong; ZHANG Chi; ZHOU Bo; REN Zongling; DAI Jun

doi:10.7671/j.issn.1001-411X.201903034

Journal of South China Agricultural University > 2020 > 41(1): 83-90. > DOI: 10.7671/j.issn.1001-411X.201903034

CUI Yingying, WU Jialong, ZHANG Chi, et al. Impacts of different ecological types of earthworm on aggregate distribution and stability in typical latosolic red and red soils[J]. Journal of South China Agricultural University, 2020, 41(1): 83-90. DOI: 10.7671/j.issn.1001-411X.201903034

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Impacts of different ecological types of earthworm on aggregate distribution and stability in typical latosolic red and red soils

1.
College of Natural Resources and Environment, South China Agricultural University/ Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture P. R. China/ Key Laboratory of the Ministry of Land and Resources for Construction Land Transformation/ Guangdong Province Key Laboratory of Land Use and Consolidation, Guangzhou 510642, China
2.
Land Development and Reclamation Center of Guangdong Province, Guangzhou 510635, China
3.
Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory of Tea Plant Resources Innovation and Utilization, Guangzhou 510640, China

More Information

Received Date: March 10, 2019
Available Online: May 17, 2023

Graphical Abstract

Abstract

Abstract

Objective
To comprehensively analyze the effects of different ecological types of earthworm on soil aggregate distribution, water stability of aggregate and percentage of aggregate disruption (PAD) in South China, and provide scientific basis and theoretical support for utilizing earthworms to improve soil structure.

Method
The laboratory culture experiment was carried out in this study. Eisenia fetida, Pontoscolex corethrurus, Amynthas robustus and A. aspergillum were added in typical latosolic red soil and red soil in South China to study the impacts of different ecological species of earthworm on soil structure.

Result
Compared with the blank control, the addition of P. corethrurus, A. robustus and A. aspergillum significantly promoted the formation of large-aggregates (d > 2 000 μm) in two soil types ( P < 0.05), The large-aggregate proportion in latosolic red soil increased respectively by 35.20%, 44.81% and 37.88%, and increased respectively by 14.92%, 25.31% and 20.18% in red soil. A. robustus significantly reduced the contents of water stable large-aggregates (d > 2 000 μm) and small-aggregates (250 μm≤ d≤2 000 μm) in latosolic red soil, but significantly increased the proportion of water stable micro-aggregates (d < 250 μm, P < 0.05), which was 37.84% higher than that of the blank control. The addition of four types of earthworms significantly increased PAD values in both two soil types ( P < 0.05), and the PAD value in adding A. aspergillum treatment was the lowest. The results of principal component analysis showed that there were significant differences in the distributions and stabilities of soil aggregates under the action of different earthworms in two different soils (P < 0.05).

Conclusion
The impacts of different earthworm types in South China on latosolic red soil and red soil aggregate distribution and stability are different. The endogenic earthworm (P. corethrurus and A. robustus) has the best impact on the improvement of soil structure. The endo-anecic (A. aspergillum) had the least destructive impact on water stable soil aggregate.
- earthworm,
- soil structure,
- soil aggregate,
- distribution,
- stability,
- percentage of aggregate disruption

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References (37)

References

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