Journal of East China Normal University(Natural Science) ›› 2023, Vol. 2023 ›› Issue (3): 64-70.doi: 10.3969/j.issn.1000-5641.2023.03.007

• Ecological and Environmental Sciences • Previous Articles     Next Articles

Effects of combined application of water-retaining agents and organic fertilizer on soil water-holding capacity in waste dumps in open pit coal mines

Guilin WANG1(), Heyi GONG2, Kankan SHANG2,3,4,*(), Liangjun DA2,4   

  1. 1. CHN Energy Zhunneng Group Co. Ltd., Ordos, Inner Mongolia 010300, China
    2. Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China
    3. Shanghai Chenshan Botanical Garden, Shanghai 201602, China
    4. Institute for Interdisciplinary and Innovate Research, Xi’an University of Architecture and Technology, Xi’an 710055, China
  • Received:2022-04-21 Accepted:2022-10-20 Online:2023-05-25 Published:2023-05-25
  • Contact: Kankan SHANG;


This study investigated the combined application of water-retaining agents and organic fertilizers to enhance the soil water-holding capacity of waste dumps in open pit coal mines by measuring the anti-evaporation capacity and water content of man-made soil. The results showed that the anti-evaporation capacity of water-retaining agents in the gel state was superior to that in the dry state. Among the tested water-retaining agents, we found that France Essen at a concentration of 5% was the optimal choice. The soil water-holding time could be prolonged by the combined application of water-retaining agents and organic fertilizers, resulting in improved soil water-holding capacity. The optimum ratio of water-retaining agents to organic fertilizer was 3‰∶20% or 5‰∶10%. The water retention time of field capacity in this area would be improved by more than one time. Our findings provide valuable insights for the scientific community regarding soil remediation in waste dumps within open pit coal mines in Northwest China.

Key words: Heidaigou, soil structure, water content, anti-evaporation capacity, open pit coal mines

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