...Its existence was first discovered by E. Raman (1905). It corresponds to Distrochlepto or Eutrochlepto in the American soil classification system Soil Taxonomy (1975). Unlike the case under coniferous forests in the humid subarctic zone, the soil temperature and soil moisture are favorable and the fallen leaves of broadleaf trees are rich in bases such as calcium and magnesium, so soil microorganisms and soil animals are active, rapidly decomposing the fallen leaves and branches and mixing them well with inorganic matter, so that a dark, not very thick, mull-type humus layer ( A1 layer) with a well-developed aggregate structure is formed on the surface. ... *Some of the terminology that refers to "Soil Taxonomy" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…E.ラマンによって最初にその存在が明らかにされた(1905)。アメリカの土壌分類体系《Soil Taxonomy》(1975)におけるディストロクレプトあるいはユートロクレプトに相当する。 湿潤亜寒帯の針葉樹林下の場合とちがって,土壌温度や土壌水分が好適なことと広葉樹の落葉がカルシウムやマグネシウムなどの塩基類に富んでいるため,土壌微生物や土壌動物が盛んに活動して落葉落枝を急速に分解するとともに無機物とよく混合するので,表層には団粒構造のよく発達した暗色のあまり厚くないムル型の腐植層(A1層)が形成されている。… ※「《Soil Taxonomy》」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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