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Effects of acid mine drainage irrigation on iron and carbon in paddy soils and the response of microbial community structure
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Jian LIU1, Shao-xun NIU1, En-hui HUANG1, Zheng-cong LIU1, Xiao-fei LI1, Xiao-lian WU1, Chang-dong KE2, Yan-ping BAO1, *
China Environmental Science | 2025, 45(5) : 2654 - 2663
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China Environmental Science | 2025, 45(5): 2654-2663
• Soil Pollution Control •
Effects of acid mine drainage irrigation on iron and carbon in paddy soils and the response of microbial community structure
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Jian LIU1, Shao-xun NIU1, En-hui HUANG1, Zheng-cong LIU1, Xiao-fei LI1, Xiao-lian WU1, Chang-dong KE2, Yan-ping BAO1, *
Affiliations
  • 1.School of Environment and Chemical Engineering, Foshan University, Foshan 528000, China
  • 2.The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, Ministry of Ecology and Environment of the People’s Republic of China, Guangzhou 510655, China
Published: 2025-05-20
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This study focused on the long-term AMD-contaminated paddy soils in the Dabaoshan mining area of Guangdong Province. The distribution characteristics of soil iron phases and iron-bound organic carbon were analysed, combining with high-throughput sequencing to examine the effects of AMD irrigation on soil organic carbon sequestration and the response of soil microbial community structure. The results indicated that: ① AMD irrigation led to soil acidification, with accumulation of iron, sulfur and heavy metals in paddy soils. The contents of TOC in paddy soils showed significant positive correlation with TFe, and OCFe. ② AMD irrigation resulted in decreases of soil microbial abundance and diversity. AMD irrigation led to a decrease in the relative abundance of Geobacter in paddy soils, whereas acid tolerant iron and/or sulfur metabolizing bacteria such as Thiobacillus and Thioifustis became the dominant bacteria in paddy soils with the most heavily AMD pollution. ③ RDA analysis identified Fep, TOC, and TFe were the most crucial factors influencing microbial community structure. In conclusion, AMD irrigation brought dissolved iron into paddy soils which was beneficial to soil organic carbon preservation. In addition, AMD irrigation resulted in the formation of microbial community structure that closely related to AMD pollution gradient, the form and content of iron and carbon.

paddy soil  /  acid mine drainage  /  microbial community structure  /  active iron  /  organic carbon
Jian LIU, Shao-xun NIU, En-hui HUANG, Zheng-cong LIU, Xiao-fei LI, Xiao-lian WU, Chang-dong KE, Yan-ping BAO. Effects of acid mine drainage irrigation on iron and carbon in paddy soils and the response of microbial community structure[J]. China Environmental Science, 2025 , 45 (5) : 2654 -2663 .
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Year 2025 volume 45 Issue 5
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  • Receive Date：2024-09-30
  • Online Date：2026-03-18
  • Published：2025-05-20
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  • Received：2024-09-30
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Affiliations
    1.School of Environment and Chemical Engineering, Foshan University, Foshan 528000, China
    2.The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, Ministry of Ecology and Environment of the People’s Republic of China, Guangzhou 510655, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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