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Halophyte functional groups influence seasonal variations in rhizosphere microbial necromass and enzyme activities in an inland saline ecosystem

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A Correction to this article was published on 16 October 2023

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Abstract

In this study, we investigated the seasonal changes in enzyme activities and microbial necromass carbon (C) in the bulk and rhizosphere soils of different halophytes (shrubs, grasses, and forbs) in an inland saline ecosystem in China. We found that the soil enzyme activities and microbial necromass C were 45–646% higher in rhizosphere soils than bulk soils regardless of the season and halophyte functional group. The activities of soil enzymes and bacterial necromass C were highest for forbs (4.9–172.3 nmol g−1 h−1 and 473.2 mg kg−1, respectively), and grasses had the highest fungal necromass C (FN-C) and total necromass C/soil organic C (TN-C/SOC) ratio. Moreover, the soil enzyme activities were higher in the late season stage (4.0–154.0 nmol g−1 h−1) than the early (3.6–132.1 nmol g−1 h−1) and middle (3.8–128.9 nmol g−1 h−1) season stages. FN-C and TN-C/SOC ratio were significantly higher in the middle season than the early and late seasons. Redundancy analysis showed that the enzyme activities and microbial necromass C mainly depended on the soil physicochemical properties, season, and halophyte functional group. Our results indicate that microbial turnover was consistently faster in rhizosphere soil than bulk soil in an inland saline ecosystem, and forbs could be used as pioneer species to improve microbial turnover during the phytoremediation of saline ecosystems.

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Data Availability

Data are available from the corresponding author upon reasonable request.

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Funding

This study was supported by the National Key Research and Development Program (2022YFF1302804), Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23070202 and XDB40020000), National Natural Science Foundation of China (41977068, 41977105, and 42277349), and the Programs from Chinese Academy of Sciences (QYZDB-SSW-DQC039).

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Authors and Affiliations

  1. State Key Laboratory of Soil Erosion and Dryland Faming On the Loess Plateau, The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi, 712100, China

    Tianhui Lu, Liping Qiu, Xiaorong Wei & Xiaomei Gou

  2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, 712100, China

    Tianhui Lu & Xiaomei Gou

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Tianhui Lu & Xiaomei Gou

  4. State Key Laboratory of Soil Erosion and Dryland Faming On the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China

    Chunliang Chen, Liping Qiu, Zhenrui Cao, Yaxian Hu, Zekun Zhong, Xiaorong Wei & Benshuai Yan

  5. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China

    Chunliang Chen, Zhenrui Cao & Yueqing Yang

  6. CAS Center for Excellence in Quaternary Science and Global Change, Xi’an, 710061, China

    Liping Qiu & Xiaorong Wei

Authors
  1. Tianhui Lu
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  2. Chunliang Chen
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  3. Liping Qiu
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  4. Zhenrui Cao
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  5. Yaxian Hu
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  6. Zekun Zhong
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  7. Yueqing Yang
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  8. Xiaorong Wei
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  9. Xiaomei Gou
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  10. Benshuai Yan
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Contributions

Xiaorong Wei and Liping Qiu planned and designed the research; Tianhui Lu, Chunliang Chen, Zhenrui Cao, and Yueqing Yang performed experiments and conducted fieldwork; Tianhui Lu and Xiaorong Wei analyzed data and wrote the manuscript; Xiaorong Wei, Yaxian Hu, and Zekun Zhong revised the manuscript; Xiaomei Gou analyzed part of the data during revision; Benshuai Yan consulted literature and revised references during revision.

Corresponding author

Correspondence to Xiaorong Wei.

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Lu, T., Chen, C., Qiu, L. et al. Halophyte functional groups influence seasonal variations in rhizosphere microbial necromass and enzyme activities in an inland saline ecosystem. Biol Fertil Soils 59, 989–1003 (2023). https://doi.org/10.1007/s00374-023-01768-8

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