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Bamboo charcoal enhances cellulase and urease activities during chicken manure composting:Roles of the bacterial community and metabolic functions

查看全文 作　　者：Yanan [1,2]Yin;Chao [1]Yang;Jingrui [1]Tang;Jie [3]Gu;Haichao [4]Li;Manli [5]Duan;Xiaochang [1,2]Wang;Rong [1,2]Chen 高影响力作者 机构地区：[1]Key Laboratory of Northwest Water Resource,Environment and Ecology,MOE,School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;[2]International S&T Cooperation Center for Urban Alternative Water Resources Development,Xi’an University of Architecture and Technology,Xi’an 710055,China;[3]College of Resources and Environmental Sciences,Northwest A&F University,Yangling,Shaanxi 712100,China;[4]Department of Environment,Faculty of Bioscience Engineering,Ghent University,9000 Ghent,Belgium;[5]State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2021年第33卷第10期,共12页高影响力期刊 基　　金：supported by the National Key R&D Program of China(No.2019YFB2103003);the Key Research and Development Project of Shaanxi Province(No.2020ZDLNY0608);the Scientific Research Program of Shaanxi Provincial Education Department(No.20JT039);China Postdoctoral Science Foundation(2020M673357);the Youth Innovation Team of Shaanxi Universities in 2020 year(PI:Dr Haihan Zhang);Shaanxi Provincial Program for Innovative Research Team(No.2019TD-025)。 摘　　要：Microbial enzymes are crucial for material biotransformation during the composting process.In this study,we investigated the effects of adding bamboo charcoal(BC)(i.e.,at 5%,10%,and 20%corresponding to BC5,BC10,and BC20,respectively)on the enzyme activity levels during chicken manure composting.The results showed that BC10 could increase the cellulose and urease activities by 56%and 96%,respectively.The bacterial community structure in BC10 differed from those in the other treatments,and Luteivirga,Lactobacillus,Paenalcaligenes,Ulvibacter,Bacillus,Facklamia,Pelagibacterium,Sporosarcina,Cellvibrio,and Corynebacterium had the most important roles in composting.Compared with other treatments,BC10 significantly enhanced the average rates of degradation of carbohydrates(Dxylose(40%)andα-D-lactose(44%))and amino acids(L-arginine(16%),L-asparagine(14%),and L-threonine(52%)).We also explored the associations among the bacterial community and their metabolic functions with the changes in the activities of enzymes.Network analysis demonstrated that BC10 altered the co-occurrence patterns of the bacterial communities,where Ulvibacter and class Bacilli were the keystone bacterial taxa with high capacities for degrading carbon source,and they were related to increases in the activities of cellulase and urease,respectively.The results obtained in this study may help to further enhance the efficiency of composting. 关 键 词：Bacterial community Carbon utilization CELLULASE COMPOSTING UREASE
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