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Mineral-microbial interactions in nine-year organic fertilization field experiment: a mechanism for carbon storage in saline-alkaline paddy soil

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Abstract

Aims

Organic fertilizer addition plays a significant role for soil organic carbon (SOC) storage. The interaction between bacteria and clay minerals for the mechanism of SOC storage with organic fertilization was investigated in saline-alkaline paddy soil.

Methods

A 9-year field experiment was arranged, which included: (a) CK, without fertilizer addition, (b) NPK, mineral N, P and K fertilizer addition, (c) NPKC1, and (d) NPKC2, mineral N, P and K fertilizer plus 450 and 900 kg C ha−1, respectively.

Results

In comparison to only mineral fertilization, the content of humic acid-C and humin-C was significantly increased by 58.8%–70.6% and 46.9–53.1% with organic fertilizer addition, respectively. The 2:1 type clay minerals (vermiculite and illite) were also increased, which were positively correlated with SOC storage due to the formation of clay minerals-humus complexes. Meanwhile, the abundance of Geobacter and Anaeromyxobacter was increased with organic fertilization, which accelerated the transformation of clay minerals by promoting Fe reduction, and then increased SOC storage. While, compared with NPKC1 treatment, more Gammaproteobacteria and Anaerolineae, involved in the decomposition of SOC, were found in NPKC2 treatment. Relative to NPK treatment, SOC storage of NPKC1 and NPKC2 treatments increased by 23.3% and 29.8%, respectively, and there was no significant difference between the two treatments.

Conclusions

Therefore, appropriate addition of organic fertilizer is a better fertilization practice to promote stability and storage of SOC, which provided an important contribution to elucidate the role of mineral-microbial interactions for storage of SOC in saline-alkaline paddy soil.

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Acknowledgements

We thank the foundation of National Key Research and Development Project (2021YFD190090106), the project of Agricultural Science and Technology Innovation (CAAS-ZDRW202201), Shandong Province Modern Agricultural Industrial Technology System (SDAIT-17-05) and Shandong Province Natural Science Fund (ZR2020MC154).

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Authors and Affiliations

Authors

Contributions

Conceptualization: Mengmeng Chen, Xiaodong Ding, Yuyi Li.

Data curation: Mengmeng Chen, Xiaodong Ding.

Formal analysis: Mengmeng Chen, Xiaodong Ding.

Funding acquisition: Xiaodong Ding, Yuyi, Li, Shirong Zhang.

Investigation: Mengmeng Chen, Shirong Zhang, Lu Liu.

Methodology: Mengmeng Chen, Xiaodong Ding, Yuling Zhang.

Software: Mengmeng Chen, Yuling Zhang.

Writing original draft: Mengmeng Chen, Yuling Zhang, Xiaodong Ding, Shirong Zhang.

Writing review & editing: Mengmeng Chen, Shirong Zhang, Lu Liu, Xiaodong Ding, Yuyi Li, Chunwei Gao.

Corresponding authors

Correspondence to Yuyi Li or Xiaodong Ding.

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Competing interests

There are no competing interests.

Additional information

Responsible Editor: Zucong Cai.

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Chen, M., Zhang, Y., Gao, C. et al. Mineral-microbial interactions in nine-year organic fertilization field experiment: a mechanism for carbon storage in saline-alkaline paddy soil. Plant Soil 489, 465–481 (2023). https://doi.org/10.1007/s11104-023-06032-4

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  • DOI: https://doi.org/10.1007/s11104-023-06032-4

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