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Utilizing soil organic phosphorus for sustainable crop production: insights into the rhizosphere

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Abstract

Background

We are facing the challenge of sustainable phosphorus (P) use due to high P inputs in farmland and low P-use efficiency of crops, which leads to critical soil P imbalances and accelerates consumption of limited P resources. Organic P is an essential component of the soil P cycle, and if managed properly, may compensate partly for decreased usage of P fertilizers. However, organic P dynamics in the rhizosphere has received little attention even though it is important for P availability to plants.

Scope

We review biological turnover of organic P in soils, focusing on the processes driven by roots and microbial communities and their interactions in the rhizosphere. We also consider recent progress in understanding of organic P acquisition strategies that integrate soil carbon (C) cycling. We address several perspectives to achieve more sustainable P use in agriculture via rhizosphere management aimed at recycling and re-using soil organic P.

Conclusions

Organic P mineralization by microorganisms may be limited by low P and/or C availability. In these processes, plants interact with microorganisms to alter stoichiometric ratios of C to P in the rhizosphere soils or microbial community, thus impacting on turnover of organic P into inorganic P for plant absorption, which is manifested in plant-microbial facilitation/competition in the rhizosphere. We highlight future research in improving rhizosphere management of agroecosystems by optimizing nutrient inputs and enhancing rhizosphere interactions to manipulate P and C dynamics towards sustainable organic P use.

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Data sharing is not applicable to this article as no new data were created or analyzed in this paper.

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Acknowledgements

This study was supported financially by the National Natural Science Foundation of China (32130094, 31772402, 31330070), Hainan Provincial Natural Science Foundation of China (321CXTD443), the project of Beijing’s advanced disciplines, Yunnan rural revitalization science and technology project of China (Grant No. 202104BI090004) and the 2115 Talent Development Program of China Agricultural University, PR China.

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Contributions

KZ and JS conceived the ideas; KZ and JS wrote the manuscript, with input from ZR. All authors contributed critically to drafts and gave final approval for publication.

Corresponding author

Correspondence to Jianbo Shen.

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The authors declare that they have no competing interests.

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Responsible Editor: Kari Dunfield.

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Zhang, K., Zheng, D., Gu, Y. et al. Utilizing soil organic phosphorus for sustainable crop production: insights into the rhizosphere. Plant Soil 498, 57–75 (2024). https://doi.org/10.1007/s11104-023-06136-x

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  • DOI: https://doi.org/10.1007/s11104-023-06136-x

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