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Effect of Sewage Irrigation on the CT-Measured Soil Pore Characteristics of a Clay Farmland in Northern China

Author

Listed:
  • Xiaoming Guo

    (Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China)

  • Tongqian Zhao

    (Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China)

  • Lin Liu

    (Nanjing Center, China Geological Survey, Nanjing 210016, China)

  • Chunyan Xiao

    (Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China)

  • Yuxiao He

    (Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China)

Abstract

Sewage irrigation has a strong influence on the physical, chemical, and biological properties of soil. However, the effects of sewage irrigation on the pore characteristics of soil are not well understood. This study compares the effects of sewage irrigation and groundwater irrigation on computed tomography (CT)-measured pore parameters and examines the relationships between CT-measured pore parameters and soil physicochemical and microbial properties. Intact soil cores were collected from S1 irrigated with sewage for 25 years, S2 irrigated with sewage for 52 years, and CK irrigated with groundwater. Various soil pore characteristics were determined, including the total pore number, macropore number (>1 mm diam.), coarse mesopore number (0.264–1 mm diam.), total porosity, macroporosity, coarse mesoporosity, and circularity. The results indicated that sewage irrigation significantly affected soil pore number and porosity. Compared with S1 and S2, CK exhibited a higher average total pore number (91), macropore number (40), coarse mesopore number (51), total porosity (2.08%), macroporosity (1.90%), and coarse mesoporosity (0.18%) throughout the 50–350 mm layer. At depths of 200–350 mm, S2 exhibited the lowest average total pore number (33), macropore number (13), coarse mesopore number (21), total porosity (0.42%), macroporosity (0.35%), and coarse mesoporosity (0.07%) among the three sites. In addition, the average pore numbers and porosity at depths of 200–350 mm decreased with increasing sewage irrigation time. There were significant positive correlations between pore features (including pore numbers and porosity) and soil properties (phosphorus content and fungi numbers). Our results suggest that decreased macropore numbers and macroporosity in the sewage-irrigated farmland may strongly intensify the accumulation of metals and nutrients in the upper layer. The findings of this study are useful for understanding the negative effects of sewage irrigation on soil pore structure and are critical for developing sustainable strategies in agriculture.

Suggested Citation

  • Xiaoming Guo & Tongqian Zhao & Lin Liu & Chunyan Xiao & Yuxiao He, 2018. "Effect of Sewage Irrigation on the CT-Measured Soil Pore Characteristics of a Clay Farmland in Northern China," IJERPH, MDPI, vol. 15(5), pages 1-14, May.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:5:p:1043-:d:148389
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    References listed on IDEAS

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    1. Pedrero, Francisco & Kalavrouziotis, Ioannis & Alarcón, Juan José & Koukoulakis, Prodromos & Asano, Takashi, 2010. "Use of treated municipal wastewater in irrigated agriculture--Review of some practices in Spain and Greece," Agricultural Water Management, Elsevier, vol. 97(9), pages 1233-1241, September.
    2. Tunc, Talip & Sahin, Ustun, 2015. "The changes in the physical and hydraulic properties of a loamy soil under irrigation with simpler-reclaimed wastewaters," Agricultural Water Management, Elsevier, vol. 158(C), pages 213-224.
    3. Meng, Weiqing & Wang, Zuwei & Hu, Beibei & Wang, Zhongliang & Li, Hongyuan & Goodman, Robbin Cole, 2016. "Heavy metals in soil and plants after long-term sewage irrigation at Tianjin China: A case study assessment," Agricultural Water Management, Elsevier, vol. 171(C), pages 153-161.
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    1. repec:caa:jnlswr:v:preprint:id:64-2023-swr is not listed on IDEAS
    2. Nannan Wang & Tibin Zhang, 2024. "Soil pore structure and its research methods: A review," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 19(1), pages 1-24.
    3. Yuanzheng Zhai & Fuxin Zheng & Dongfan Li & Xinyi Cao & Yanguo Teng, 2022. "Distribution, Genesis, and Human Health Risks of Groundwater Heavy Metals Impacted by the Typical Setting of Songnen Plain of NE China," IJERPH, MDPI, vol. 19(6), pages 1-17, March.
    4. Jocenei A. T. de Oliveira & Fábio A. M. Cássaro & Adolfo N. D. Posadas & Luiz F. Pires, 2022. "Soil Pore Network Complexity Changes Induced by Wetting and Drying Cycles—A Study Using X-ray Microtomography and 3D Multifractal Analyses," IJERPH, MDPI, vol. 19(17), pages 1-17, August.

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