燕山矿区苜蓿恢复过程中土壤养分与微生物的演变特征  

Evolution characteristics of soil nutrients and microorganisms during alfalfa restoration of mining area in Yanshan Mountain

作　　者：马建军[1] 姚虹[1] 刘辉 田美荣 MA Jianjun;YAO Hong;LIU Hui;TIAN Meirong(College of Life Sciences,Langfang Normal University;Langfang Zetong Forestry Engineering Design Co.,Ltd.;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences)

机构地区：[1]廊坊师范学院生命科学学院 [2]廊坊泽通林业工程设计有限公司 [3]环境基准与风险评估国家重点实验室,中国环境科学研究院

出　　处：《环境工程技术学报》2023年第1期270-279,共10页Journal of Environmental Engineering Technology

基　　金：河北省自然科学基金项目(C2020408015)。

摘　　要：为了揭示在极端恶劣矿区环境中,苜蓿对土壤改良的高效性、时效性和持续性,利用高通量测序技术,研究燕山矿区不同恢复时间(3、6、10和15年)苜蓿地土壤微生物群落结构及土壤养分累积特征。结果显示,苜蓿可以高效地提高土壤速效氮、速效钾、有机质等养分的浓度以及变形菌门、酸杆菌门、子囊菌门、担子菌门、鞘氨醇单胞菌科、伯克氏菌科、根瘤菌科、芽孢杆菌科、毛壳菌科和粉褶菌科等优势微生物类群的相对丰度。苜蓿对土壤养分的恢复以第6年为最佳;土壤优势微生物类群的相对丰度在第6年或第10年显著升高;苜蓿对细菌的恢复进度较快,而对真菌的恢复较慢。In order to reveal the high efficiency,timeliness and sustainability of alfalfa(Medicago sativa)on soil improvement in extremely harsh mining environment,the soil microbial community structure and soil nutrient accumulation characteristics of alfalfa land with different restoration years(3,6,10 and 15 years)in Yanshan mining area were studied by using high-throughput sequencing technology.The results showed that alfalfa could effectively improve the concentration of nutrients such as soil available nitrogen,available potassium,organic matter and the relative abundance of some dominant microbial groups,including Proteobacteria,Acidobacteria,Ascomycota,Basidiomycota,Sphingomonadaceae,Burkholderiaceae,Rhizobiaceae,Bacillaceae,Chaetomiaceae and Entolomataceae.The effect of alfalfa on soil nutrient improvement was the best in the 6th year.The relative abundance of dominant soil microbial groups increased significantly in the 6th or 10th year,and the restoration rate of bacteria by alfalfa was faster,while that of fungi was slower.

关 键 词：苜蓿 矿区 植被恢复 土壤养分 土壤微生物 

分 类 号：X171.4[环境科学与工程—环境科学]