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Meng T, Han J, Zhang Y, Sun Y, Liu Z, Zhang R. Multifractal characteristics of soil particle size distribution of abandoned homestead reclamation under different forest management modes. Sci Rep 2024; 14:8864. [PMID: 38632337 PMCID: PMC11024207 DOI: 10.1038/s41598-024-59466-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 04/11/2024] [Indexed: 04/19/2024] Open
Abstract
In this study, fast-growing poplar reclaimed from abandoned homestead in Xixian New District, Xi'an City, Shaanxi Province, was used as the research object to explore the multi-fractal characteristics of soil particle size distribution under different management modes of abandoned land (control), irrigation, fertilizer irrigation and mixed fertilizer irrigation. The results showed that the mean values of soil clay, silt and sand in abandoned land were 14.58%, 81.21% and 4.22% respectively, 14.08%, 79.92% and 5.99% under irrigation, 15.17%, 81.19% and 3.64% under fertilizer irrigation, and 16.75%, 80.20% and 3.05% in mixed fertilizer treatment. From 40 cm, with increasing soil depth, soil clay particles increase under irrigation, fertilizer irrigation, and mixed fertilizer irrigation modes. The single fractal dimension of soil particle size distribution (D) in each treatment ranges from 2.721 to 2.808. At 60-100 cm, D shows fertilizer irrigation > mixed fertilizer irrigation > irrigation > abandoned land, indicating that fertilization and irrigation can increase the fine-grained matter of deep soil particles and reduce soil roughness. Compared with abandoned land, under irrigation, fertilizer irrigation and mixed fertilizer modes the capacity dimension (D0), entropy dimension (D1), correlation dimension(D2), shape characteristics of the multifractal spectrum (Δf) and overall inhomogeneity of the soil particle size distribution (D0-D10) indicate an uneven distribution of soil particle size; fractal structure characteristics of soil (D-10-D0) indicate a simplified soil structure, and degree of dispersion of soil particle size distribution (D1/D0) indicates that soil particle size is distributed in dense areas. Pearson correlation analysis showed that D was significantly correlated with clay, sand, D0-D10, soil organic matter (SOM) and soil available phosphorus (SAP) (P < 0.05). Stepwise regression analysis showed that clay was the main controlling factor of D and D0-D10 changes. The research results can provide some potential indicators for the quality evaluation of abandoned homestead reclamation.
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Affiliation(s)
- Tingting Meng
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an, China
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, China
- Key Laboratory of Cultivated Land Quality Monitoring and Conservation, Ministry of Agriculture and Rural Affairs, Xi'an, China
| | - Jichang Han
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an, China.
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China.
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, China.
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, China.
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, China.
- Key Laboratory of Cultivated Land Quality Monitoring and Conservation, Ministry of Agriculture and Rural Affairs, Xi'an, China.
| | - Yang Zhang
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an, China
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, China
- Key Laboratory of Cultivated Land Quality Monitoring and Conservation, Ministry of Agriculture and Rural Affairs, Xi'an, China
| | - Yingying Sun
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an, China
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, China
- Key Laboratory of Cultivated Land Quality Monitoring and Conservation, Ministry of Agriculture and Rural Affairs, Xi'an, China
| | - Zhe Liu
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an, China
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, China
- Key Laboratory of Cultivated Land Quality Monitoring and Conservation, Ministry of Agriculture and Rural Affairs, Xi'an, China
| | - Ruiqing Zhang
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an, China
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, China
- Key Laboratory of Cultivated Land Quality Monitoring and Conservation, Ministry of Agriculture and Rural Affairs, Xi'an, China
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Meng H, Wang S, Zhang J, Wang X, Qiu C, Hong J. Effects of coal-derived compound fertilizers on soil bacterial community structure in coal mining subsidence areas. Front Microbiol 2023; 14:1187572. [PMID: 37275171 PMCID: PMC10233127 DOI: 10.3389/fmicb.2023.1187572] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/03/2023] [Indexed: 06/07/2023] Open
Abstract
The land damaged by coal mining can be recovered to healthy condition through various reclamation methods. Fertilization is one of the effective methods to improve soil fertility and microbial activity. However, the effects of coal-derived compound fertilizers (SH) on bacterial communities in coal mining subsidence areas still remain unclear. Here, we studied the effects on the nutrient characteristics and bacterial communities in fertilizer-reclaimed soil (CK, without fertilizer; CF, common compound fertilizers; SH, coal-derived compound fertilizers) in coal mining subsidence areas and we applied SH with four different nitrogen application rates (90, 135, 180, and 225 kg/hm2). The results showed that the application of SH significantly increased the contents of available nitrogen (AN), available phosphorus (AP), available potassium (AK), total phosphorus (TP) and soil organic matter (SOM) compared with CK, as well as the bacterial richness (Chao1) and diversity (Shannon) in reclaimed soil that increased first and then decreased with the increase of nitrogen application. Under the same nitrogen application rate (135 kg/hm2), the nutrient content, Chao1 and Shannon of SH2 treatments were higher than those of CF treatment. Meanwhile, SH increased the relative abundance of Proteobacteria, Actinobacteria and Gemmatimonadetes. LEfSe analysis indicated that the taxa of Acidobacteria and Actinobacteria were significantly improved under SH treatments. Canonical correspondence analysis (CCA) and Variance partitioning analysis (VPA) showed that SOM was the most important factor affecting the change of bacterial community structure in reclaimed soil. In conclusion, application of SH can not only increase nutrient content and bacterial diversity of reclaimed soil, but also improve bacterial community structure by increasing bacterial abundance.
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Affiliation(s)
- Huisheng Meng
- College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Shuaibing Wang
- College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Jie Zhang
- College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Xiangying Wang
- College of Life Sciences, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Chen Qiu
- College of Urban and Rural Construction, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Jianping Hong
- College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi, China
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Li X, Jin Z, Xiong L, Tong L, Zhu H, Zhang X, Qin G. Effects of Land Reclamation on Soil Bacterial Community and Potential Functions in Bauxite Mining Area. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16921. [PMID: 36554801 PMCID: PMC9778865 DOI: 10.3390/ijerph192416921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/06/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Studying the characteristics of microorganisms in mine reclamation sites can provide a scientific reference basis for mine land reclamation. Soils in the plough layer (0-20 cm) of the bauxite mine plots in Pingguo city, Guangxi Zhuang Autonomous Region, China, with different reclamation years were used as the research objects. The community structure of soil bacteria was analyzed with high-throughput sequencing technology. The results show the following: (1) Reclamation significantly increased the contents of soil nutrients (p < 0.05). (2) The relative abundances of Proteobacteria were high (22.90~41.56%) in all plots, and reclamation significantly reduced the relative abundances of Firmicutes (3.42-10.77%) compared to that in the control plot (24.74%) (p < 0.05). The relative abundances of α-proteobacteria generally increased while the reclamation year increased. The relative abundances of α-proteobacteria and γ-proteobacteria showed significant positive correlations with soil carbon, nitrogen, and phosphorus nutrients (p < 0.01). The relative abundance of Acidobacteria Group 6 showed significant positive correlations with soil exchangeable Ca and Mg (p < 0.01). (3) Bacterial co-occurrence network showed more Copresence interactions in all plots (50.81-58.39%). The reclaimed plots had more nodes, higher modularity, and longer characteristic path length than the control plot, and the keystone taxa changed in different plots. (4) The chemoheterotrophy and aerobic chemoheterotrophy were the most abundant functional groups in all plots (35.66-48.26%), while reclamation reduced the relative abundance of fermentation groups (1.75-11.21%). The above findings indicated that reclamation improved soil nutrients, changed the bacterial community structure and potential functions, and accelerated the microbial stabilization of the reclaimed soil.
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Affiliation(s)
- Xuesong Li
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Zhenjiang Jin
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
| | - Liyuan Xiong
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Lingchen Tong
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Hongying Zhu
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Xiaowen Zhang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Guangfa Qin
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
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Profile of Bacterial Community and Antibiotic Resistance Genes in Typical Vegetable Greenhouse Soil. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19137742. [PMID: 35805398 PMCID: PMC9265268 DOI: 10.3390/ijerph19137742] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 12/10/2022]
Abstract
The use of vegetable greenhouse production systems has increased rapidly because of the increasing demand for food materials. The vegetable greenhouse production industry is confronted with serious environmental problems, due to their high agrochemical inputs and intensive utilization. Besides this, antibiotic-resistant bacteria, carrying antibiotic-resistance genes (ARGs), may enter into a vegetable greenhouse with the application of animal manure. Bacterial communities and ARGs were investigated in two typical vegetable-greenhouse-using counties with long histories of vegetable cultivation. The results showed that Proteobacteria, Firmicutes, Acidobacteria, Chloroflexi, and Gemmatimonadetes were the dominant phyla, while aadA, tetL, sul1, and sul2 were the most common ARGs in greenhouse vegetable soil. Heatmap and principal coordinate analysis (PCoA) demonstrated that the differences between two counties were more significant than those among soils with different cultivation histories in the same county, suggesting that more effects on bacterial communities and ARGs were caused by soil type and manure type than by the accumulation of cultivation years. The positive correlation between the abundance of the intI gene with specific ARGs highlights the horizontal transfer potential of these ARGs. A total of 11 phyla were identified as the potential hosts of specific ARGs. Based on redundancy analysis (RDA), Ni and pH were the most potent factors determining the bacterial communities, and Cr was the top factor affecting the relative abundance of the ARGs. These results might be helpful in drawing more attention to the risk of manure recycling in the vegetable greenhouse, and further developing a strategy for practical manure application and sustainable production of vegetable greenhouses.
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