Changes of nutrients and microbial communities in recovery process of abandoned rare earth tailings

作     者：Bing ZHANG Junli WU Mengyuan HUANG Yan ZHANG Jin ZHAO Chuntao HE Zhongyi YANG Bing ZHANG;Junli WU;Mengyuan HUANG;Yan ZHANG;Jin ZHAO;Chuntao HE;Zhongyi YANG

作者机构：School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China School of AgricultureState Key Laboratory for BiocontrolShenzhen Campus of Sun Yat-sen UniversitySun Yat-sen UniversityShenzhen 518107China 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2024年第34卷第4期

页      面：826-836页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.42293350 42293354 42293355 and 21707177) 

主　　题：abandoned duration mining tailing N-fixing bacteria nutrient recovery P-solubilizing fungi rare earth element 

摘      要：Rare earth element(REE)mining has wrought severe ecosystem destruction,particularly in the loss of carbon(C),nitrogen(N),and phosphorus(P).Furthermore,its effects on nutrient recovery characteristics and associated microbial abundance are still poorly *** this study,an investigation was conducted to determine C,N,and P recovery patterns and microbial communities in abandoned REE mining tailings with different abandoned durations of 1.5(1.5-Y),7(7-Y),10(10-Y),and 14(14-Y)years and at an unmined site(the control group)in Jiangxi Province,*** tailing delamination at each site was investigated in 0–15(layer 1)and 15–30(layer 2)cm tailing *** the abandoned duration of REE tailings,C and P in layer 1 continued to recover from 1.62 to 8.51 g kg^(-1) and from 0.71 to 1.94 g kg^(-1),respectively;N losses of 0.60 and 0.22 g kg^(-1) occurred at the 1.5-Y and 10-Y sites,while N in layer 1 slightly increased at the 14-Y ***,Methylosinus,Bradyrhizobium,Pseudomonas,and Azospirillum were dominant bacteria at the 14-Y site and in the *** relative abundances of N-fixing bacteria Mesorhizobium(32.94%),Sinorhizobium(0.24%),Frankia(0.71%),and Burkholderia(2.38%)at the 14-Y site were 1.33–3.97 times those in the control(24.19%,0.18%,0.32%and 0.60%,respectively),which was helpful for tailing N *** the 14-Y site,Tylospora(50.24%),Luellia(11.02%),Tomentella(6.94%),and Chaetomium(4.34%)were the dominant fungal genera,while Tylospora(56.93%),Suillus(11.45%),and Penicillium(6.78%)predominated in the *** relative abundance of the P-dissolving fungus Aspergillus at the 14-Y site(0.42%)was 4.2 times that in the control(0.1%),which may lead to the improved tailing P *** the 14-Y site,woody plants such as Pinus massoniana and native pioneering herbs and ferns such as Dicranopteris dichotoma and Nephrolepis auriculata probably invaded from adjacent *** study unraveled the natural restoration of plant and micro