摘要
改良剂与植被联合修复是促进赤泥土壤化的关键,但其对赤泥团聚体中养分和微生物特性的影响尚不清晰。通过开展盆栽修复实验探究改良剂(磷石膏、木醋液、鱼粪、菌渣)与黑麦草联合修复对赤泥团聚体中养分、酶活性、微生物群落空间分异特征的影响。结果表明,在改良剂与植被联合修复赤泥后,大团聚体(>0.25 mm)和微团聚体(<0.25 mm)占比分别减少和增加。团聚体中有机质、养分质量分数、酶活性及微生物群落Alpha多样性指数显著增加(P<0.05),且主要分布于<1 mm团聚体。此外,团聚体养分、酶活性、微生物群落间呈显著正相关(P<0.05)。本研究结果可为深入了解赤泥土壤化过程中养分迁移转化机理及修复植物的养分自维持机制提供参考。
The synergistic remediation of amendment and vegetation is the key to promote soil formation of bauxite residue;however,their effects on the nutrient and microbial properties of bauxite residue aggregates are still unclear.The synergistic remediation of amendments(phosphogypsum,wood vinegar,fish manure,and mushroom residue) and perennial ryegrass(Lolium perenne L.) on the spatial differentiation characteristics of nutrient,enzyme activity,and microbial community in the bauxite residue aggregates were investigated by conducting a pot experiment.The results showed that the proportion of macroaggregates(>0.25 mm) and microaggregates(<0.25 mm) reduced and increased in the amended and revegetated bauxite residue,respectively.The organic matter,nutrient,enzyme activity,and the alpha diversity indices of microbial community in the bauxite residue aggregates increased significantly(P<0.05) under the synergistic remediation of amendment and vegetation,which were mainly distributed in the aggregates with size of 1 mm.In addition,there was a significant positive correlation among the nutrient,enzyme activity,and microbial community in the bauxite residue aggregates(P<0.05).These results can provide a reference for in-depth understanding of the mechanisms of the migration and transformation of nutrient during soil formation of bauxite residue and the nutrient self-sustaining in plants.
作者
万祖燕
罗有发
陈雨露
万乾松
邹玉正
吴永贵
WAN Zuyan;LUO Youfa;CHEN Yulu;WAN Qiansong;ZOU Yuzheng;WU Yonggui(College of Resource and Environmental Engineering,Guizhou University,Guiyang 550025,China;Key Laboratory of Kast Georesources and Environment,Ministry of Education,Guizhou University,Guiyang 550025,China;Guizhou Hostile Environment Ecological Restoration Technology Engineering Research Centre,Guizhou University,Guiyang 550025,China;Guizhou Karst Environmental Ecosystems Observation and Research Station,Ministry of Education,Guizhou University,Guiyang 550025,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第6期1967-1977,共11页
Chinese Journal of Environmental Engineering
基金
贵州省科技计划资助项目(黔科合支撑[2021]一般479
黔科合重大专项字[2019]3010)。
关键词
赤泥
植被恢复
团聚体
养分
酶活性
微生物群落
空间分异
bauxite residue
phytoremediation
aggregates
nutrient
enzymatic activity
microbial community
spatial differentiation characteristic
