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Impact of N application rate on tea (Camellia sinensis) growth and soil bacterial and fungi communities

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Abstract

Purpose

Applying excessive N is a common strategy in tea plantations. Fungal and bacterial responses to N fertiliser addition in tea plantations, especially their relationship with tea growth, quality, and soil microbiome composition, remain unclear.

Methods

We performed a field experiment using different N fertiliser application rates for 5 years (2016‒2020) in a tea-producing region of China.

Results

The N application rate of 360 kg ha−1 y−1 achieved the highest tea yield and quality. Bacterial diversity and community responses to N addition were more apparent than fungal diversity and community responses. Partial least square path modelling suggested that N addition directly affected the diversity and communities of bacteria and fungi and indirectly affected bacterial community and fungal diversity by altering soil contents. N fertiliser application contributed to tea growth but did not maintain high microbial diversity.

Conclusion

Fungal alpha and beta diversity had a greater effect on tea yield and quality than bacterial diversity; therefore, more attention should be given to fungi such as ligninolytic and cellulolytic taxa, which play a stable role in nutrient cycling and organic matter decomposition in tea plantations, favouring tea growth in the long term.

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Abbreviations

AA:

Amino acid

AK:

NH4OAc-K

AN:

Alkali-hydrolysable N

ANOVA:

One-way analysis of variance

AP:

Available phosphorus

NCM:

Neutral community model;

NMDS:

Non-metric multidimensional scaling

OTU:

Operational taxonomic unit

PLS-PM:

Partial least squares path modelling

RDA:

Redundancy analysis

SOC:

Soil organic carbon

TN:

Total nitrogen

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (32102488, 32172674), and the National Key Research and Development Program of China (2020YFD1100402).

Funding

This work was supported by the National Key Research and Development Program of China (Grant number [2020YFD1100402]) and the National Natural Science Foundation of China (Grant numbers [31801936] and [31872180]).

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Authors and Affiliations

Authors

Contributions

Sheng Tang: Conceptualisation, Methodology, Formal analysis, Writing - Original draft. Lianghuan Wu: Conceptualisation, Methodology, Formal analysis. Qingxu Ma: Conceptualisation, Methodology, Formal analysis, Writing - Original draft. Tong Qi: Conceptualisation, Methodology, Formal analysis, Writing - Original draft. Zhengbo Ma: Investigation. Rui Tang: Investigation. Wankun Pan: Investigation. Haoran Fu: Investigation. **gjie Zhou: Investigation. Meng Xu: Investigation.

Corresponding author

Correspondence to Qingxu Ma.

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Competing Interests

The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this paper.

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Tang, S., Zhou, J., Pan, W. et al. Impact of N application rate on tea (Camellia sinensis) growth and soil bacterial and fungi communities. Plant Soil 475, 343–359 (2022). https://doi.org/10.1007/s11104-022-05372-x

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  • DOI: https://doi.org/10.1007/s11104-022-05372-x

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