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Wang X, Xia X, Riaz M, Babar S, El-Desouki Z, Qasim M, Wang J, Jiang C. Biochar amendment modulate microbial community assembly to mitigate saline-alkaline stress across soil depths. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 385:125574. [PMID: 40328120 DOI: 10.1016/j.jenvman.2025.125574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2024] [Revised: 04/25/2025] [Accepted: 04/26/2025] [Indexed: 05/08/2025]
Abstract
While microbial community assembly in saline-alkali topsoils is well-documented, distribution patterns across biochar application depths and soil layers remain unclear. This incubation study evaluated five treatment: no biochar (CK), homogeneous application (EB), and concentrated applications in upper (FB: 0-10 cm), middle (MB: 10-20 cm), or bottom layers (DB: 20-30 cm). Biochar application significantly accelerated vertical salt migration, with FB inducing 45.55 % and 61.01 % increases in water-soluble Na+ and Cl- accumulation in the bottom layer. Microbial network complexity and interspecies interactions were highest in the upper layer (edges: 926), contrasting sharply with simplified communities in deeper layer (edges ≤552). Community assembly across layers was primarily driven by salt gradients, with deep-layer communities dominated by salt-tolerant taxa (such as Halomonas and Desulfobacterota). Among treatments, FB led to the highest biomarker abundance and α-diversity. Mechanistically, FB mitigated microbial diversity loss in mid-deep layers by establishing a symbiotic consortium of salt-tolerant keystone taxa (Bacillus-Pseudomonas-Ascomycota), which enhanced stress resilience via cross-feeding. These findings demonstrate that stratified biochar application (FB) optimizes salt redistribution while fostering stress-adapted microbial consortia across soil profiles, offering a targeted strategy for saline-alkali soil remediation.
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Affiliation(s)
- Xiangling Wang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Xiaoyang Xia
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Muhammad Riaz
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, PR China
| | - Saba Babar
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Zeinab El-Desouki
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Muhammad Qasim
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Jiyuan Wang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Cuncang Jiang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China.
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Han Y, Kou J, Jiang B, Li J, Liu C, Lei S, Xiao H, Feng C. Bryophytes adapt to open-pit coal mine environments by changing their functional traits in response to heavy metal-induced soil environmental changes. JOURNAL OF HAZARDOUS MATERIALS 2025; 482:136613. [PMID: 39581032 DOI: 10.1016/j.jhazmat.2024.136613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2024] [Revised: 11/12/2024] [Accepted: 11/20/2024] [Indexed: 11/26/2024]
Abstract
Plants have unique adaptability to heavy metal pollution. However, the adaptation strategies of bryophytes are still unclear. In order to better understand the response of bryophytes to different heavy metal and the adaptation mechanisms of different species to heavy metal pollution, we studied soil physicochemical properties, distribution of heavy metal elements, ecological risk assessment and the community structure, functional characteristics of bryophytes in large open-pit coal mines in Inner Mongolia. The results indicate that: (1) The soil in three open-pit mining areas currently does not pose an ecological risk from the heavy metal pollution, but high concentrations of Zn and Hg are found in most parts of the study area; (2) The presence of a single heavy metal drives the distribution of specific taxa of bryophytes. Apart from Hg, Pb, and Zn, all the other heavy metals significantly impact the community structure of bryophytes; (3) With the exception of Pb and Hg, all the other heavy metals have an influence on the functional traits of bryophytes; 4) Different taxa of bryophytes will adapt to changes in soil environments caused by heavy metal pollution by altering their functional traits (blades, leaf cells, or plant size).
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Affiliation(s)
- Yu Han
- Key Laboratory of Vegetation Ecology, School of Life Sciences, Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Jin Kou
- Key Laboratory of Vegetation Ecology, School of Life Sciences, Ministry of Education, Northeast Normal University, Changchun 130024, China.
| | - Baichuan Jiang
- Key Laboratory of Vegetation Ecology, School of Life Sciences, Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Junping Li
- Key Laboratory of Vegetation Ecology, School of Life Sciences, Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Changchang Liu
- Department of Railway Power Supply, Heilongjiang Communitications Polytechnic, Harbin 150025, China
| | - Shaogang Lei
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221116, China
| | - Hongxing Xiao
- Key Laboratory of Vegetation Ecology, School of Life Sciences, Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Chao Feng
- Key Laboratory of Grassland Resources, Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture, College of Grassland, Resources and Environment, Ministry of Education P.R. of China, Inner Mongolia Agricultural University, Hohhot 010011, China.
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Li S, Wang C, Huang H, Zhao L, Cao J, Wang B. Vermicompost and flue gas desulfurization gypsum addition to saline-alkali soil decreases nitrogen losses and enhances nitrogen storage capacity by lowering sodium concentration and alkalinity. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 368:122156. [PMID: 39128348 DOI: 10.1016/j.jenvman.2024.122156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 06/21/2024] [Accepted: 08/07/2024] [Indexed: 08/13/2024]
Abstract
Saline-alkali soils have poor N storage capacity, high N loss and inadequate nutrient supply potential, which are the main limiting factors for crop yields. Vermicompost can increase organic nutrient content, improve soil structure, and enhance microbial activity and function, and the Ca2+ in flue gas desulfurization (FGD) gypsum can replace Na+ and neutralize alkalinity in saline-alkali soils though chemical improvement. This study aimed to determine if vermicompost and FGD gypsum addition could improve the N storage capacity through decreasing NH3 volatilization and 15N/NO3- leaching from saline-alkali soils. The results indicate that the combined application of vermicompost and FGD gypsum led to the displacement and leaching Na+ in the upper soil layer (0-10 cm), as well as the neutralization of HCO3- by the reaction with Ca2+. This treatment also improved soil organic matter content and macroaggregate structure. Also, these amendments significantly increased the abundance of nifH and amoA genes, while concurrently decreasing the abundance of nirK gene. The structural improvements and the lowering of Na + concentration in and alkalinity decreased cumulative NH3 volatilization, and leaching of 15N and NO3- to the deep soil layer (20-30 cm). FGD gypsum increased the 15N stocks and inorganic N stocks of saline-alkali soil, whereas vermicompost not only increased the 15N and inorganic N stocks, but also increased the total N stocks, the combination of vermicompost and FGD gypsum can not only increase the available N storage capacity, but also enhance the potential for N supply. Therefore, vermicompost and FGD gypsum decrease N loss and increase N storage capacity through structural improvement, and lowering of Na+ concentration and alkalinity, which is crucial for improving the productivity of saline-alkali soil.
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Affiliation(s)
- Siping Li
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, China
| | - Chong Wang
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, China.
| | - Huiying Huang
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, China
| | - Lei Zhao
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, China
| | - Jia Cao
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, China
| | - Binglei Wang
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, China
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Xing J, Li X, Li Z, Wang X, Hou N, Li D. Remediation of soda-saline-alkali soil through soil amendments: Microbially mediated carbon and nitrogen cycles and remediation mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171641. [PMID: 38471593 DOI: 10.1016/j.scitotenv.2024.171641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/06/2024] [Accepted: 03/09/2024] [Indexed: 03/14/2024]
Abstract
Due to the high salt content and pH value, the structure of saline-sodic soil was deteriorated, resulting in decreased soil fertility and inhibited soil element cycling. This, in turn, caused significant negative impacts on crop growth, posing a major challenge to global agriculture and food security. Despite numerous studies aimed at reducing the loss of plant productivity in saline-sodic soils, the knowledge regarding shifts in soil microbial communities and carbon/nitrogen cycling during saline-sodic soil improvement remains incomplete. Consequently, we developed a composite soil amendment to explore its potential to alleviate salt stress and enhance soil quality. Our findings demonstrated that the application of this composite soil amendment effectively enhanced microbial salinity resistance, promotes soil carbon fixation and nitrogen cycling, thereby reducing HCO3- concentration and greenhouse gas emissions while improving physicochemical properties and enzyme activity in the soil. Additionally, the presence of CaSO4 contributed to a decrease in water-soluble Na+ content, resulting in reduced soil ESP and pH by 14.64 % and 7.42, respectively. Our research presents an innovative approach to rehabilitate saline-sodic soil and promote ecological restoration through the perspective of elements cycles.
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Affiliation(s)
- Jie Xing
- Heilongjiang Academy of Environmental Sciences, Harbin, Heilongjiang 150056, PR China
| | - Xianyue Li
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, 150030, PR China
| | - Zhaoquan Li
- Heilongjiang Academy of Environmental Sciences, Harbin, Heilongjiang 150056, PR China
| | - Xiaotong Wang
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, 150030, PR China
| | - Ning Hou
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, 150030, PR China.
| | - Dapeng Li
- College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang, 150030, PR China.
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