褐煤粉尘对矿区复垦土壤有机碳矿化及细菌群落的影响  

Effects of lignite dust on organic carbon mineralization and bacterial community in reclaimed soil in mining area

作　　者：王浩 王伟 薄慧娟 张旭龙 李泽瑾 王海波 张强[1,2] 靳东升 WANG Hao;WANG Wei;BO Huijuan;ZHANG Xulong;LI Zejin;WANG Haibo;ZHANG Qiang;JIN Dongsheng(College of Resources and Environment,Shanxi Agricultural University;Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources;College of Resources and Environmental Sciences,China Agricultural University)

机构地区：[1]山西农业大学资源环境学院 [2]土壤环境与养分资源山西省重点实验室 [3]中国农业大学资源与环境学院

出　　处：《环境工程技术学报》2024年第5期1436-1443,共8页Journal of Environmental Engineering Technology

基　　金：国家重点研发计划项目(2020YFC1806500);山西省科技重大专项计划项目(202201140601028);山西农业大学优秀博士启动项目(2023BQ120);山西省博士毕业研究人员来晋工作奖励经费科研项目(SXBYKY2023038)。

摘　　要：煤粉尘沉降至地表后能够显著提高土壤有机碳含量,改变土壤理化性质和土壤微生物群落结构。通过添加褐煤粉尘的土壤培养试验,探究煤粉尘输入的有机碳对土壤有机碳矿化效果及细菌群落的影响。结果表明:在褐煤粉尘影响下,土壤CO_(2)矿化量和矿化速率较对照组最大提升55.02%和54.58%(第5天);土壤易氧化有机碳和土壤微生物生物量碳含量在培养结束后较最大值分别降低40.75和141.39 mg/kg。添加褐煤粉尘导致变形菌门的相对丰度显著降低,而酸杆菌、放线杆菌和厚壁菌门的相对丰度升高。褐煤粉尘输入的有机组分能够在短期内产生激发效应,其自身被土壤细菌分解的过程也能促进土壤CO_(2)的矿化累积,并且提高土壤细菌群落的多样性和变异程度。褐煤粉尘中的有机碳极大程度参与了土壤有机碳库周转过程。After coal dust sinks to the surface,it can significantly increase the content of soil organic carbon and change the soil physicochemical properties and soil microbial community structure.This article explored the mechanism of the effect of organic carbon input from coal dust on soil organic carbon mineralization and bacterial community structure through soil cultivation experiments with the addition of lignite dust.The results showed that under the influence of lignite dust,the amount and rate of CO_(2) mineralization in soil increased by 55.02%and 54.58%compared to the control group on day 5;the contents of readily oxidation carbon(ROC)and microbial biomass carbon(MBC)in soil decreased by 40.75 and 141.39 mg/kg,respectively,compared to the maximum values after the end of cultivation.The addition of lignite led to a significant decrease in the relative abundance of Proteobacteria,while the relative abundance of Acidobacteria,Actinobacteria,and Firmicutes increased.The organic components input from lignite dust can produce stimulating effects in the short term.Its decomposition process by soil bacteria can also promote the accumulation of soil CO_(2) mineralization,increasing the diversity and variation of soil bacterial communities.The organic carbon in lignite dust greatly participates in the turnover process of soil organic carbon pool.

关 键 词：褐煤粉尘 矿化过程 活性有机碳 官能团结构 土壤细菌群落 

分 类 号：X53[环境科学与工程—环境工程]