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| 赤泥矿泥土壤化处置复垦区土壤理化性状和微生物群落变化研究 |
| Soil physical and chemical properties and microbial community changes in reclaimed areas of red mud and mineral mud soil treatment |
| Received:April 05, 2024 |
| DOI：10.13254/j.jare.2024.0219 |
| 中文关键词: 赤泥，矿泥，土壤重构，理化性质，群落结构 |
| 英文关键词: red mud, mineral mud, soil reconstruction, physical and chemical property, community structure |
| 基金项目:广西重点研发计划项目（2020AB19012）；中国铝业股份有限公司科技攻关项目（GXZZ202210） |
| Author Name | Affiliation | E-mail | | ZENG Yuhui | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China | | | CHENG Guanwen | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China | chenggw@glut.edu.cn | | WANG Yunlong | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China | | | DU Chenghao | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China | | | ZHANG Zhenglin | Guangxi Branch of Aluminum Corporation of China Limited, Pingguo 531400, China | | | NONG Guowu | Guangxi Branch of Aluminum Corporation of China Limited, Pingguo 531400, China | | | HUANG Zhenyi | Guangxi Branch of Aluminum Corporation of China Limited, Pingguo 531400, China | |
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| 中文摘要: |
| 为探究赤泥矿泥土壤化处置复垦场地耕作层土壤重构过程及变异规律，本研究以中国铝业股份有限公司广西分公司赤泥矿泥土壤化处置复垦区新建复垦场地、复垦2年场地及对照（复垦多年）场地0~20 cm和20~40 cm耕作层土壤为研究对象，分析土壤化处置复垦场地在肥料-玉米协同作用下耕作层土壤理化性质、土壤肥力、土壤微生物群落特征，并进行相关性分析。结果显示：新建场地土壤理化性质和肥力逐渐改善和提升，但不及复垦2年场地和对照；复垦2年场地各指标均接近对照，其中7月份时0~20 cm土壤硝态氮、速效钾含量均为三块场地中最高，分别为29.26、87.13 mg·kg-1；三块场地优势菌门均为变形菌门、酸杆菌门、放线菌门，新建场地与复垦2年场地在微生物群落多样性上略高于对照。试验场地土壤理化性质间相关性及微生物群落与环境因子间RDA分析和Pearson相关性分析显示，pH、AP、NH+4-N对土壤细菌群落结构组成影响较大。研究表明，肥料-植物协同与复垦年限、土壤环境因子、细菌菌群以及养分间相互作用共同促进赤泥矿泥土壤化处置复垦场地耕作层土壤环境重塑和土壤微生态重建。 |
| 英文摘要: |
| To explore the process and variation patterns of soil reconstruction in the cultivation layer of red mud and mineral mud soil treatment in reclamation sites, this study examined the physical and chemical properties, fertility, and microbial community characteristics of soil in the cultivation layer under the synergistic effect of fertilizer-corn in different soil sources and years of reclamation sites, and conduct correlation analysis at the Aluminum Corporation of China Limited Guangxi Branch. These lands included new built reclamation site and 2-year reclamation site in red mud and mineral mud soil treatment and comparison site, across two soil depths（0-20 cm and 20- 40 cm）. The results showed that the physicochemical properties and fertility of the soil at the new built site were gradually improved and upgraded, but were still lower than the other two reclaimed sites; The indicators of the 2-year reclamation site were all close to those in the comparison site, and the nitrate nitrogen and available potassium in the 0-20 cm soil were the highest among the three sites in July, which were 29.26 mg·kg-1 and 87.13 mg·kg-1, respectively; The dominant phyla of the three sites were Proteobacteria, Acidobacteria, and Actinobacteria; the microbial community diversity of the new built site and the 2-year reclaimed site were slightly higher than that of the comparison. The correlation between soil physicochemical properties and RDA analysis and Pearson correlation between microbial community and environmental factors in test sites showed that pH, AP, and NH4+-N had a significant impact on the composition of bacterial community structure. Research has shown that fertilizer-plant synergy, reclamation age, soil environmental factors, bacterial communities, and nutrient interactions jointly promote the reshaping of soil environment and the reconstruction of soil microecology in the cultivation layer of red mud and mineral mud soil treatment in reclamation sites. |
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