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Soil properties and habitats determine the response of bacterial communities to agricultural wastewater irrigation

Pedosphere 2020年第1期30卷 146-158页

作者： Sascha M.B.KRAUSE Anja B.DOHRMANN Osnat GILLOR Bent T.CHRISTENSEN ines merbach Christoph C.TEBBE Thünen Institute of Biodiversity Federal Research Institute for Rural AreasForestry and FisheriesBundesallee 65Braunschweig 38116Germany Zuckerberg Institute for Waster Research Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevMidreshet IL-84990Israel Department of Agroecology Aarhus UniversityAU-FolumTjele 8830Denmark Helmholtz Centre for Environmental Research-Umweltforschungszentrum(UFZ) Department Community EcologyBad Lauchstadt D-06246Germany

Increasing temperatures and variability of precipitation events due to climate change will lead in the future to higher irrigation demands in ***,the use of secondary treated wasterwater(TWW)could have consequences for the receiving soil environment and its resident microbial *** objective of this study was to characterize the importance of soil properties and habitats to the response of soil bacteria and archaea to irrigation with *** agricultural soils with contrasting textures(loamy sand or silt loam)and,for each,three variants differing in soil organic carbon and nitrogen,as generated by long-term fertilization,were *** each of these six soils,prokaryotic communities from two habitats,i.e.,root-free bulk soil and the rhizosphere of developing cucumber plants in the greenhouse,were *** were analyzed by the quantity and diversity of their polymerase chain reaction(PCR)-amplified 16S rRNA *** account for TWW-associated nutrient effects,potable water(PW)served as a *** sequence analysis showed that prokaryotic communities mainly consisted of bacteria(99.8%).Upon irrigation,regardless of the water quality,prokaryotic diversity declined,p H increased,and no bacterial growth was detected in bulk *** contrast,the growth of cucumbers was stimulated by TWW,indicating that plants were the main ***,strong responses were seen in the rhizosphere,suggesting an indirect effect of TWW by altered *** main bacterial responders to TWW were Proteobacteria,Bacteroidetes,Actinobacteria,and *** in bacterial communities due to TWW were less pronounced in all variants of the silt loam,indicating the importance of clay and soil organic carbon for buffering effects of TWW on soil bacterial ***,soil organic carbon and soil texture are important parameters that need to be considered when applying TWW in agriculture.

关键词： 16S rRNA gene sequences buffering effect cucumber rhizosphere microbial community dynamics rhizodeposition soil organic carbon soil texture treated wastewater irrigation

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