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首页> 外文期刊>Pedobiologia >Simulated nitrogen deposition decreases soil microbial diversity in a semiarid grassland, with little mediation of this effect by mowing
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Simulated nitrogen deposition decreases soil microbial diversity in a semiarid grassland, with little mediation of this effect by mowing

机译：模拟氮沉积在半干旱草原上降低了土壤微生物多样性，通过割草很少调解这种效果

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摘要

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.
机译：大气氮（N）沉积对土壤微生物群落多样性和组成具有重要影响。虽然众所周知，割草是一种广泛使用的草地管理策略，可以调节N富集对宏生物群落组成的影响，较少众所周知的是土壤微生物群落的红外变异及其对N沉积的反应和反应割草。在这里，我们检查了土壤细菌和真菌社区在中国北方半干旱草原中四个月的沉积和割草的沉积和割草。氮气添加显着降低了α-多样性，并改变了普遍所有月份的细菌和真菌社区的社区组成，可能是由于N诱导的土壤酸化。割草不影响土壤微生物群落多样性，并没有介导不加法的影响。土壤微生物群落多样性和组合物在不同的月份显着变化。土壤微生物群落组合物的这种时间变异远大于由N加入和割草产生的变异。我们的研究结果表明，N富集对土壤细菌和真菌多样性的负面影响在时间上是一致的，不受植物生物质去除的影响。

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  • 来源
    《Pedobiologia》 |2020年第2020期|共9页
  • 作者

    Wei Hai-Wei; Wang Xiao-Guang; Li Ying-Bin; Yang Jun-Jie; Wang Jun-Feng; Lu Xiao-Tao; Han Xing-Guo;

  • 作者单位

    Chinese Acad Sci Inst Appl Ecol CAS Key Lab Forest Ecol &

    Management Erguna Forest Steppe Ecotone Res Stn Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Appl Ecol CAS Key Lab Forest Ecol &

    Management Erguna Forest Steppe Ecotone Res Stn Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Appl Ecol CAS Key Lab Forest Ecol &

    Management Erguna Forest Steppe Ecotone Res Stn Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Bot State Key Lab Vegetat Environm Change Beijing 100093 Peoples R China;

    Northeast Normal Univ Inst Grassland Sci Key Lab Vegetat Ecol Minist Educ Changchun 130024 Jilin Peoples R China;

    Chinese Acad Sci Inst Appl Ecol CAS Key Lab Forest Ecol &

    Management Erguna Forest Steppe Ecotone Res Stn Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Appl Ecol CAS Key Lab Forest Ecol &

    Management Erguna Forest Steppe Ecotone Res Stn Shenyang 110016 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 土壤生物学;
  • 关键词

    Nitrogen addition; Mowing; Soil microbial community composition; Diversity; Seasonal; 16S rRNA; ITS rRNA;

    机译：氮气添加;割草;土壤微生物群落组成;多样性;季节性;16S rRNA;它的rRNA;

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