期刊
PEDOBIOLOGIA
卷 80, 期 -, 页码 -出版社
ELSEVIER GMBH
DOI: 10.1016/j.pedobi.2020.150644
关键词
Nitrogen addition; Mowing; Soil microbial community composition; Diversity; Seasonal; 16S rRNA; ITS rRNA
资金
- Key Research Program from CAS [QYZDB-SSW-DQC006]
- K.C.Wong Education Foundation [GJTD-2019-10]
- National Natural Science Foundation of China [31822006, 31770503]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB15010403]
- National Key Research and Development Program of China [2016YFC0500601]
- Liaoning Revitalizing Talents Program [XLYC1807061]
- Shenyang Science and Technology Bureau [RC180320]
- Youth Innovation Promotion Association CAS [2014174]
- Key Laboratory of Vegetation Ecology, Ministry of Education
Atmospheric nitrogen (N) deposition has important effects on soil microbial community diversity and composition. While it is well-known that mowing, a widely used grassland management strategy, could mediate the impacts of N enrichment on macro-organism community composition, much less known is the infra-annual variation of soil microbial community and their responses to N deposition and mowing. Here, we examined the responses of soil bacteria and fungi communities to N deposition and mowing in four months of different seasons in a semiarid grassland in northern China. Nitrogen addition significantly reduced alpha-diversity and changed the community composition of both bacteria and fungi communities across generally all months, possibly due to N-induced soil acidification. Mowing did not affect soil microbial community diversity and did not mediate the impacts of N addition. Soil microbial community diversity and composition significantly varied across different months. Such temporal variation of soil microbial community composition was much greater than the variation resulting from N addition and mowing. Our results suggest that the negative impacts of N enrichment on soil bacteria and fungi diversity are temporally consistent and are unaffected by plant biomass removal.
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