Divergent mechanisms of labile phosphorus accumulation in paddy soils under TPU microplastics versus manure-derived hydrochar: roles of dissolved organic matter and bacterial communities

Xudong Zhong; Yanfang Feng; Rixing Zhu; Yang Song; Yuanyuan Feng; Huifang Xie; Bingyu Wang; Gerrard Eddy Jai Poinern

doi:10.1007/s44246-026-00259-3

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Divergent mechanisms of labile phosphorus accumulation in paddy soils under TPU microplastics versus manure-derived hydrochar: roles of dissolved organic matter and bacterial communities

Journal article

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Divergent mechanisms of labile phosphorus accumulation in paddy soils under TPU microplastics versus manure-derived hydrochar: roles of dissolved organic matter and bacterial communities

Xudong Zhong, Yanfang Feng, Rixing Zhu, Yang Song, Yuanyuan Feng, Huifang Xie, Bingyu Wang and Gerrard Eddy Jai Poinern

Carbon Research, Vol.5(1), 21

2026

DOI: https://doi.org/10.1007/s44246-026-00259-3

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Abstract

Ceramics

Composites

Earth and Environmental Science

Environment

Environmental Engineering/Biotechnology

Fossil Fuels (incl. Carbon Capture)

General

Glass

Natural Materials

Original Article

Renewable and Green Energy

The availability of phosphorus (P) in paddy soils is essential for sustainable agriculture and labile P (LP) content is influenced by soil dissolved organic matter (DOM) and the soil microbiome. However, the mechanisms by which anthropogenic carbon sources such as hydrochar (HC) and microplastics (MPs) regulate P fraction transformation remain poorly understood. Results showed that HC and MPs increased soil LP content by 21.1% and 14.2%, respectively, and raised soil DOM content by 21.3% and 27.9%. Bacterial communities emerged as the key drivers of these processes, with significant correlations observed between soil DOM features and LP dynamics (p < 0.05). HC enhanced interspecific competition by increasing carbon bioavailability, which was reflected in the accelerated turnover of bacterial communities (v = 0.217) and the dominance of copiotrophic bacteria. MPs, on the other hand, boosted microbial network complexity by promoting the secretion of protein-like soil DOM, fostering more interconnected microbial communities. These changes facilitated the conversion of soil LP. These findings highlight the distinct mechanisms by which HC and MPs regulate soil P cycling, emphasizing the importance of soil DOM-microbe interactions for sustainable P management in agriculture.

Details

Title: Divergent mechanisms of labile phosphorus accumulation in paddy soils under TPU microplastics versus manure-derived hydrochar: roles of dissolved organic matter and bacterial communities
Authors/Creators: Xudong Zhong - Nanjing University of Science and Technology
Yanfang Feng - Ministry of Agriculture and Rural Affairs
Rixing Zhu - Nanjing University of Science and Technology
Yang Song - Chinese Academy of Sciences
Yuanyuan Feng - Nanjing Forestry University
Huifang Xie - State Key Laboratory of Pollution Control and Resource Reuse
Bingyu Wang - Nanjing University of Science and Technology
Gerrard Eddy Jai Poinern - Murdoch University, Centre for Water, Energy and Waste
Publication Details: Carbon Research, Vol.5(1), 21
Publisher: Springer Nature Singapore
Grant note: 2022-3-23-083 / “333 Project” of Jiangsu Province (http://dx.doi.org/10.13039/501100018592) 42107398; 42277332 / National Natural Science Foundation of China (http://dx.doi.org/10.13039/501100001809) 2024YFD1700300 / National Key Research and Development Program of China
Identifiers: 991005876854107891
Murdoch Affiliation: Centre for Water, Energy and Waste
Language: English
Resource Type: Journal article

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