首页|Distinct responses of active and total bacterial communities to inorganic fertilization in a 30-year experimental site
Distinct responses of active and total bacterial communities to inorganic fertilization in a 30-year experimental site
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NSTL
Elsevier
? 2022Soil microbial communities play a vital role in mediating nutrient turnover, thus enhancing growth and development of plants. Understanding the dynamics of microorganisms in soils can provide insight into the influence of fertilization practices on improving soil fertility and plant growth in agricultural ecosystems. In this study, we compared the abundances and compositions of total (DNA-based, 16S rRNA gene) and active (RNA-based, 16S rRNA) bacterial communities at a 30-year experimental site in different inorganic fertilization treatments with different key elements (nitrogen, phosphorus, and potassium). The inorganic fertilizer amendments did not affect the abundance of total bacteria but significantly affected the abundance of active bacteria due to changes in microbial biomass carbon and NH4+-N contents. Cyanobacteria and Proteobacteria, especially for some dominant orders (e.g. Nostocales, Pseudanabaenales and Nitrosomonadales) were the dominant phyla in the active microbial community and differed proportionally in nitrogen and phosphorus fertilized soil. Soil N speciation (e.g. total N, NH4+-N and NO3?-N) were the main determinants controlling the Cyanobacteria and Proteobacteria communities. Our results indicated that the unbalanced fertilization could reduce the abundance of active bacteria and significantly changed the dominant phyla compared with balanced fertilization. These findings provided an insight of composition and ratio of nutrient elements including nitrogen, phosphorus and potassium for managing future fertilization regimes in agricultural ecosystem.
Active microbesBacterial communityInorganic fertilizationRNATotal microbes
Ding K.、Su X.-X.、Li H.、Dai Q.-X.、Grau O.、Penuelas J.
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Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences
Consejo Superior de Investigaciones Científicas (CSIC) Global Ecology Unit Centre for Ecological Research and Forestry Applications (CREAF)–CSIC Universitat Autonoma de Barcelona (UAB)
NSTL
Elsevier
