[1]Lu Mei,Zhao Jixia,Li Yongmei,et al.Effects of Intercropping of Maize and Potato on Rhizosphere Soil Enzyme Activity and Aggregate Stability[J].Research of Soil and Water Conservation,2023,30(06):123-132.[doi:10.13869/j.cnki.rswc.2023.06.008]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 06
Page number:
123-132
Column:
Public date:
2023-10-10
- Title:
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Effects of Intercropping of Maize and Potato on Rhizosphere Soil Enzyme Activity and Aggregate Stability
- Author(s):
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Lu Mei, Zhao Jixia, Li Yongmei, Wang Zilin, Fan Maopan
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(College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China)
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- Keywords:
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intercropping; enzymatic activity; glomalin-related soil protein; soil aggregate stability; agronomic character
- CLC:
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S152.4; S157.4+3
- DOI:
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10.13869/j.cnki.rswc.2023.06.008
- Abstract:
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[Objective] The aims of this study are to clarify the main factors affecting the stability of water-stable aggregates, and provide the scientific and technological support for the comprehensive management of red soil slope farmland in Yunnan Province. [Methods] Three treatments of maize monoculture, potato monoculture and maize and potato intercropping were set up to analyze the effects of intercropping on crop rhizosphere soil nutrient content, enzyme activity, glomalin-related soil protein(GRSP)content, aggregate composition and stability, as well as the agronomic traits and yield of crops. [Results](1)Compared with monoculture, intercropping of maize and potato not only significantly increased the content of organic matter and available phosphorus in the rhizosphere soil of potato by 13.53% and 46.53%(p<0.05), respectively, but also increased the contents of total glomalin-related soil protein(T-GRSP)and easily extractable glomalin-related soil protein(EE-GRSP)in rhizosphere soil of two crops, and the difference of maize reached a significant level(p<0.05).(2)Compared with monoculture, maize and potato intercropping could significantly increase the activities of urease, acid phosphatase and catalase in the rhizosphere soil of the two crops, as well as the content of >0.25 mm water-stable aggregates(R0.25)and mean mass diameter(MWD)of soil. The increase rates were 17.63%~41.29% for maize and 10.81%~34.79% for potato.(3)Compared with monoculture, intercropping of maize and potato significantly increased the shoot and root dry weights of both crops(p<0.05). The land equivalent ratio of maize and potato was 1.81>1, which had the advantage of intercropping yield.(4)Correlation analysis showed that EE-GRSP, T-GRSP, urease, acid phosphatase and catalase were significantly positively correlated with R0.25 and MWD(p<0.05). Redundancy analysis showed that the effects of each index on aggregate indexes followed the order: catalase>urease>EE-GRSP>acid phosphatase>T-GRSP, among which catalase was the main factor affecting the composition and stability of soil aggregates. [Conclusion] Intercropping of maize and potato can not only promote the material circulation of rhizosphere soil of two crops, increase the large-size content and stability of aggregates, but also promote the growth of aboveground and root of two crops, which is of great significance for the selection of reasonable intercropping crops in red soil sloping farmland in Yunnan Province.