The Soil Microbial Biomass : Concept, Measurement and Applications in Soil Ecosystem Research

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For many purposes the soil micro-organisms can be considered as a single pool of living soil organic matter (the soil microbial biomass). Current methods to measure the microbial biomass are described and their merits and demerits discussed. The concept of the microbial biomass as a living soil organic matter pool is illustrated by reference to it as a labile reservoir of potentially plant-available nutrients. An estimate of the turnover times of biomass carbon (C) of 0.94 years and of biomass phosphorus (P) of 0.39 years shows that the turnover rates of nutrients within the biomass may be quite different. An understanding of the dynamics of biomass P is important. The lack of P availability in many tropical agricultural soils has been described as 'the bottle-neck of world hunger'. Even if P is supplied it may be rapidly and irreversibly fixed in these, usually, strongly P-fixing soils. By adding small rates of animal manures with the fertilizer, more biomass P is formed. During the process of biomass turnover, this P may be released slowly and taken up by the crop more efficiently. Thus, in a Kenyan P-fixing soil, crop yields were much larger when both manure and fertilizer P were given than when either were applied singly.

収録刊行物

  • Microbes and environments

    Microbes and environments 16(3), 131-140, 2001-09

    日本微生物生態学会

参考文献:  42件中 1-42件 を表示

被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    110001271029
  • NII書誌ID(NCID)
    AA11173196
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    13426311
  • NDL 記事登録ID
    5928748
  • NDL 雑誌分類
    ZR5(科学技術--生物学--菌類・微生物)
  • NDL 請求記号
    Z54-J644
  • DOI
    10.1264/jsme2.2001.131
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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