| 铁的形态与第4纪红土母质上发育的土壤 |
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| 引用本文： | 林幼光,陈君月,周性敦.铁的形态与第4纪红土母质上发育的土壤[J].福建农林大学学报(自然科学版),1991(3). |
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| 作者姓名： | 林幼光 陈君月 周性敦 |
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| 作者单位： | 福建农学院基础部，福建农学院基础部，福建农学院土壤农化系 福州 350002 |
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| 摘 要： | 对分布在福建南亚、中亚热带不同比高河成阶地面上由第4纪红色粘土母质发育的赤红壤、红壤19个剖面铁的形态进行研究.结果表明,游离态氧化铁、氧化铁游离度,晶胶比随地质年龄的增大而增大;活化度变化规律性不明显.应用模糊聚类分析法,较好地将中更新世(Q_2)和晚更新世(Q_3)2个地质年代的产物区分开来.充分显示出古气候影响占优势,并不受近代气候带划分的限制.认为它们均属于古土壤的范畴.
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| 关 键 词： | Q_2红土 Q-3红土 铁的形态 模糊聚类分析法 |
The Soils Derived From Quaternary Red Clay and the Forms of Iron in These Soils |
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| Lin Youguang Chen Junyue Zhou Xingdun.The Soils Derived From Quaternary Red Clay and the Forms of Iron in These Soils[J].Journal of Fujian Agricultural and Forestry University,1991(3). |
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| Authors: | Lin Youguang Chen Junyue Zhou Xingdun |
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| Institution: | Lin Youguang~1 Chen Junyue~1 Zhou Xingdun~2 |
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| Abstract: | The content and the proportion of various iron forms in 19 pedons of red earth and lateritic red earth developed from Quaternary red clay distributed at river terraces or coast terraces of different elevation in Fujian Province were studied. The content of free iron oxide, the degree of iron segregation and the ratio of crystal iron to colloidal iron increased with geological age, whereas the degree of iron activation changed irregularly. Weathering products of Neo-Pleistocene (Q_3) and Meso-Pleistocene (Q2) could be distinguished by fuzzy clustering algorithms. It demonstrated that paleoclimate was the dominant factor influencing the soils while current climate had a little effect on them. Therefore those soils were considered as paleosols. |
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| Keywords: | Q_2 red clay Q_3 red clay iron forms fuzzy clustering algorithms |
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