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首页> 外文期刊>Plant and Soil >Soil microbes become a major pool of biological phosphorus during the early stage of soil development with little evidence of competition for phosphorus with plants
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Soil microbes become a major pool of biological phosphorus during the early stage of soil development with little evidence of competition for phosphorus with plants

机译：土壤微生物在土壤开发早期阶段成为土壤发展早期的主要磷池，几乎没有植物磷的竞争

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摘要

Aims We aimed to quantify the pool size of soil microbial biomass P (P-mic) during the early stage of soil development up to 125 years after glacial retreat in the Gongga Mountains, China and relate the pool size of P-mic to the plant P (P-plant) pools in the ecosystem. Methods We determined the pool sizes of P in soil microbes, plants and soils and the P fluxes with plant uptake and litterfall in successional ecosystems at five study sites along the 125-year Hailuogou glacial retreat chronosequence. Moreover, we estimated the flux of P cycled through microbial biomass (P-mic cycling) based on literature data. We also approached the likelihood of P competition between plants and soil microbes based on the P status of the plants, soils and soil microbes. Results The size of the P-mic pools (0.2-8.3 g m(-2)) in the organic layer and top 10 cm of the mineral soils was comparable to that of the P-plant pools (0.3-9.1 g m(-2)) at all study sites along the Hailuogou chronosequence. Based on the literature, the P-mic cycling at our study site (0.3-13.5 g m(-2) year(-1) if estimated based on temporal fluctuations of P-mic, 5.2-268 g m(-2) year(-1) if estimated based on the isotope dilution method) was at least one order of magnitude larger than the P-plant uptake (not detected-0.36 g m(-2) year(-1)) and the P-plant return by litterfall (not detected-0.16 g m(-2) year(-1)). Although P-mic became a major pool of biological P, we did not find indications of P competition between plants and soil microbes as indicated by the positive relationships between the concentrations of P-mic and plant-available P in soils and the P-rich status of plants and soil microbes. Conclusions Soil microbial biomass already becomes a major P pool in the early stage of soil development. Our estimations based on the literature suggest that P-mic cycling is probably the largest P flux in the studied up to 125-year ecosystems. Plants likely did not suffer P competition with microbes, in part due to the preferential decomposition of the P-rich compounds from dead microbial biomass which led to net P mineralization.
机译：旨在在巩膜山脉冰川撤退后的土壤发展早期阶段的土壤微生物发育早期阶段定量土壤微生物生物量P（P-MIC）的池大小，使P-MIC池大小与植物联系起来生态系统中的p（p-plant）池。方法采用125年的海拔冰川撤退时间升降阶段阶段，在五项研究网站上确定了土壤微生物，植物和土壤中P的池尺寸，植物和土壤中P的池尺寸，植物和土壤中的P助熔剂和落叶。此外，我们估计基于文献数据通过微生物生物量（P-MIC循环）循环的P的通量。我们还基于植物，土壤和土壤微生物的P级地位接近植物和土壤微生物之间P竞争的可能性。结果有机层中的P-MIC池（0.2-8.3克（-2））的尺寸和矿物土壤的前10厘米的级数相当（0.3-9.1克（-2） ）在沿着海拔ou的所有学习网站计时。基于文献，P-MIC在我们的研究现场循环（0.3-13.5克（-2）年（-1），如果基于P-MIC的时间波动，5.2-268克（-2）年（ - 1）如果基于同位素稀释方法的估计）比P树植物摄取（未检测到-0.36克（-2）年（-1））和垃圾返回（未检测到-0.16克（-2）年（-1））。虽然P-MIC成为生物p的主要池，但我们没有发现植物和土壤微生物之间的P竞争的迹象，如土壤中P-MIC和植物可用P浓度与P-MID的浓度与富有的阳性关系植物和土壤微生物的现状。结论土壤微生物生物量已经成为土壤发育早期阶段的主要P池。我们基于文献的估计表明，P-MIC循环可能是研究最多125年生态系统的最大P通量。植物可能没有与微生物竞争的P竞争，部分原因是由于从死微生物化的富含P的化合物的优先分解而导致净P矿化。

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  • 来源
    《Plant and Soil》 |2020年第2期|共16页
  • 作者

    Wang Jipeng; Wu Yanhong; Zhou Jun; Bing Haijian; Sun Hongyang; He Qingqing; Li Jingji; Wilcke Wolfgang;

  • 作者单位

    Chengdu Univ Technol Coll Ecol &

    Environm Chengdu 610059 Sichuan Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Key Lab Mt Surface Proc &

    Ecol Regulat 9 Block 4 Renminnanlu Rd Chengdu 610041 Sichuan Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Key Lab Mt Surface Proc &

    Ecol Regulat 9 Block 4 Renminnanlu Rd Chengdu 610041 Sichuan Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Key Lab Mt Surface Proc &

    Ecol Regulat 9 Block 4 Renminnanlu Rd Chengdu 610041 Sichuan Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Key Lab Mt Surface Proc &

    Ecol Regulat 9 Block 4 Renminnanlu Rd Chengdu 610041 Sichuan Peoples R China;

    Chinese Acad Sci Inst Mt Hazards &

    Environm Key Lab Mt Surface Proc &

    Ecol Regulat 9 Block 4 Renminnanlu Rd Chengdu 610041 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Ecol &

    Environm Chengdu 610059 Sichuan Peoples R China;

    KIT Inst Geog &

    Geoecol Reinhard Baumeister Pl 1 Karlsruhe Germany;

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

    Soil microbial biomass; Phosphorus cycling; Phosphomonoesterase; Primary succession; Hailuogou chronosequence;

    机译：土壤微生物生物量;磷循环;磷酸酯酶;初级继承;海拔沟计时血症;

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