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Ecological Stoichiometry of Soil Carbon, Nitrogen and Phosphorus in Reclaimed Farmland in Coal Mining Subsidence Area

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Abstract

The soil carbon, nitrogen and phosphorus content and stoichiometric characteristics of reclaimed farmland were explored, providing basic data for reclaimed farmland management. Samples of reclaimed farmland soil and normal farmland soil in the Yongxia mining area from four different years were collected. The content of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) in 0–60 cm soil layers was measured and the stoichiometric characteristics of these elements were analysed. The content of SOC and TN in the soil layers was 3.76–15.21 and 0.76–1.55 g·kg−1, respectively. The content of SOC and TN in the 0–20 cm and 20–40 cm soil layers increased as the number of reclamation years increased. The TP content in different soil layers ranged from 0.48 to 0.66 g·kg−1 and the TP in the 0–20 cm and 20–40 cm soil layers first increased and then decreased as the number of reclamation years increased. The SOC, TN and TP content in the 40–60 cm soil layer demonstrated a fluctuating trend. The mean ratio of soil carbon/nitrogen, carbon/phosphorus and nitrogen/phosphorus was 4.87–9.81, 7.12–27.07 and 1.46–2.76, respectively, across the reclamation years. Reclamation soil carbon reserves, nitrogen reserves, and C/N, C/P, and N/P ratios show significant positive correlations. The soil structure and fertility of reclaimed farmland improved gradually. These results provide a scientific basis for the sustainable development of regional ecological environments.

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The data underlying this article will be shared reasonable request to the corresponding author.

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Funding

This research was funded by the National Natural Science Foundation of China, grant number No. 41701203; Joint Funds of the National Natural Science Foundation of China, grant number No.U21A20109; Science and Technology Project of Henan Province, grant number No. 212102310818/202102310218; and Key Scientific Research Projects of Institutions of Higher Learning in Henan, grant number No. 19A630003.

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Conceptualisation, P.Z.; methodology, P.Z.; software, P.Z.; experiment, P.Z., Y.Y.; data curation, Y.Y., G.W.L; writing—original draft preparation, P.Z.; writing—review and editing, G.W.L, Y.Y. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Yang Yu.

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Zhang, P., Liu, G. & Yu, Y. Ecological Stoichiometry of Soil Carbon, Nitrogen and Phosphorus in Reclaimed Farmland in Coal Mining Subsidence Area. J Soil Sci Plant Nutr 23, 2498–2511 (2023). https://doi.org/10.1007/s42729-023-01207-5

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  • DOI: https://doi.org/10.1007/s42729-023-01207-5

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