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Optimal Thickness of Soil Cover for Reclaiming Subsided Land with Yellow River Sediments

Author

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  • Zhenqi Hu

    (Institute of Land Reclamation and Ecological Restoration, China University of Mining and Technology (Beijing), Beijing 100083, China
    School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China)

  • Linghua Duo

    (Institute of Land Reclamation and Ecological Restoration, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Fang Shao

    (School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China)

Abstract

The cultivated land area per capita in China is relatively small compared to the world average. However, most of the coal output is coming from underground mining, resulting in land subsidence and the destruction of existing cultivated land. The Yellow River is known as a ground-suspended river due to its large sediment concentration. Using unpolluted Yellow River sediment to reclaim the coal mine subsidence not only solves the problem of sediment deposition, but also solves the problem of shortage of filling material. Some experimental studies revealed low soil productivity as a result of thin soil cover. To ensure crop growth and production in land reconstructed with Yellow River sediments, determining the optimal thickness of soil cover over the sediment is extremely important. There were four experimental treatments and one control treatment. Each treatment was repeated three times. The control treatment was an original soil profile with 30 cm topsoil plus 110 cm subsoil. The four experimental treatments with different thickness of soil covers had the same thickness of topsoil (30 cm) and Yellow River sediments (60 cm), and different thickness of subsoil, which were 10, 30, 40, and 50 cm, respectively. Thus, the total thicknesses of soil cover (topsoil plus subsoil) were 40 cm, 60 cm, 70 cm, and 80 cm, respectively. The topsoil, subsoil, and Yellow River sediments were collected from Liangshan County. The soil type is fluvo-aquic. Maize ( Zea mays L.) is the main crop in Liangshan County. A greenhouse experiment was conducted to investigate the growth of maize. The results showed that (1) the peroxidase (POD) activity, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content of maize leaf decreased with an increasing thickness of soil, while soluble protein (SP) and leaf relative water content (RWC) increased. (2) The dry biomasses of the shoot and root system in T70 and T80 were not significantly different from those in the control (3) Increased soil thickness is conducive to the storage of more water and available nutrients. Considering the time and cost of reconstruction, 70 cm is the optimal thickness of soil cover on Yellow River sediment to ensure maize growth.

Suggested Citation

  • Zhenqi Hu & Linghua Duo & Fang Shao, 2018. "Optimal Thickness of Soil Cover for Reclaiming Subsided Land with Yellow River Sediments," Sustainability, MDPI, vol. 10(11), pages 1-12, October.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:11:p:3853-:d:177906
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    References listed on IDEAS

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    1. Wei Song & Xiangzheng Deng, 2015. "Effects of Urbanization-Induced Cultivated Land Loss on Ecosystem Services in the North China Plain," Energies, MDPI, vol. 8(6), pages 1-16, June.
    2. Hu, Tiantian & Yuan, Lina & Wang, Jinfeng & Kang, Shaozhong & Li, Fusheng, 2010. "Antioxidation responses of maize roots and leaves to partial root-zone irrigation," Agricultural Water Management, Elsevier, vol. 98(1), pages 164-171, December.
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    Cited by:

    1. Xiaojun Zhu & Feng Zha & Hua Cheng & Liugen Zheng & Hui Liu & Wenshan Huang & Yu Yan & Liangjun Dai & Shenzhu Fang & Xiaoyu Yang, 2022. "Spatial Pattern Reconstruction of Water and Land Resources in Coal Mining Subsidence Areas within Urban Regions," Sustainability, MDPI, vol. 14(18), pages 1-24, September.
    2. Jiaxin Guo & Zhenqi Hu & Yusheng Liang, 2022. "Causes and Countermeasures for the Failure of Mining Land Use Policy Reform: Practice Analysis from China," Land, MDPI, vol. 11(9), pages 1-19, August.
    3. Ya Shao & Qinxue Xu & Xi Wei, 2023. "Progress of Mine Land Reclamation and Ecological Restoration Research Based on Bibliometric Analysis," Sustainability, MDPI, vol. 15(13), pages 1-19, July.
    4. Linghua Duo & Zhenqi Hu, 2018. "Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments," Sustainability, MDPI, vol. 10(11), pages 1-13, November.
    5. Mihai Buta & Gheorghe Blaga & Laura Paulette & Ioan Păcurar & Sanda Roșca & Orsolya Borsai & Florina Grecu & Pauliuc Ecaterina Sînziana & Cornel Negrușier, 2019. "Soil Reclamation of Abandoned Mine Lands by Revegetation in Northwestern Part of Transylvania: A 40-Year Retrospective Study," Sustainability, MDPI, vol. 11(12), pages 1-18, June.
    6. Meijia Xiao & Qingwen Zhang & Liqin Qu & Hafiz Athar Hussain & Yuequn Dong & Li Zheng, 2019. "Spatiotemporal Changes and the Driving Forces of Sloping Farmland Areas in the Sichuan Region," Sustainability, MDPI, vol. 11(3), pages 1-16, February.

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