Abstract
Soil organic carbon (SOC) is an important indicator for soil quality evaluation. It is closely associated with soil fertility, and also has a great impact on the terrestrial carbon cycle. In this study, the distribution and storage of SOC were evaluated at the different reclamation chronosequences [(a) 2004–2007, (b) 1995–2004, (c) 1955–1995, (d) 1024–1955, and (e) < 1024)] in Dongtai City of Jiangsu Province, Eastern China. The results showed that the average SOC content ranged between 3.98 and 8.49 g/kg, which declined with the increase of soil depth. The soil bulk density exhibited the opposite trend, and had only a slight change throughout the entire study area. Both the SOC content and soil density decreased as the reclamation age increased. The SOC content were significantly higher under the 1024–1955 and < 1024 reclamation stages than the other reclamation stages. The storage of SOC in the study area was 8.03 × 105 kg at the 0–40 cm soil depth, with a SOCD of 3.07 kg/m2, which was markedly lower than the mean value in Jiangsu Province. It was concluded that the SOC storage increased proportionally to the reclamation age, and notable potential for carbon sequestration was expectable in the coastal farming area, Eastern China.
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Acknowledgements
We hereby acknowledge the anonymous reviewers for their helpful comments, which greatly improved this manuscript. This work was jointly supported by the Key Research & Development Project of Jiangsu Coast Development Group Co., LTD (2022YHTDJB02) and the Natural Science Foundation of China (42077084; U1906221).
Funding
National Natural Science Foundation of China, U1906221, Rongjiang Yao, Key Research and Development Project of Jiangsu Coast Development Group Co., LTD, 2022YHTDJB02, Rongjiang Yao.
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Conceptualization of the experiments and the manuscript was developed by XW, RY and JY. XW and WX prepared the samples and carried out the experiments. XZ analyzed the data and performed necessary computations. RY provided critical feedback and contributed to the interpretation of the results. XW wrote the original draft of the manuscript with support from RY. CC, FW and WL provided critical help in the process of revision. All authors substantially contributed to editing and reviewing the paper.
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Wang, X., Yao, R., Yang, J. et al. Soil organic carbon distribution and storage along reclamation chronosequences in a typical coastal farming area, Eastern China. Environ Earth Sci 82, 170 (2023). https://doi.org/10.1007/s12665-023-10875-6
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DOI: https://doi.org/10.1007/s12665-023-10875-6