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首页> 外文期刊>Eurasian Soil Science >Soils of pine-birch forests on high Pleistocene terraces in the Selenga delta region
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Soils of pine-birch forests on high Pleistocene terraces in the Selenga delta region

机译：塞伦加三角洲地区高更新世阶地上的松桦林土壤

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摘要

The soils of pine-birch forests on Pleistocene lake-river terraces in the Selenga delta region were studied. These soils are characterized by their weak differentiation into genetic horizons, pale or light brown color, and the weak structure of their mineral horizons. The high base saturation, weakly acid or close to neutral reaction, and homogeneous bulk chemical composition evidence the absence of the eluvial-illuvial differentiation of the soil profiles. The humus is of the fulvate-humate type. Among the humic acids, the brown acids predominate; the content of black humic acids is slightly lower and that of the nonhydrolyzable residue is elevated. In the mineral horizons, the clay and iron-clay autochthonous formations on the primary mineral grains point to the weakly pronounced process of metamorphism. In the Bm horizon, the formation of crystallized iron compounds in the form of films and fine iron segregations is observed.
机译：研究了塞伦加三角洲地区更新世湖河梯田上的松桦林土壤。这些土壤的特征在于它们向遗传层次的分化较弱，浅色或浅棕色，以及矿物层次的结构较弱。较高的碱饱和度，弱酸或接近中性反应，以及均质的大块化学成分表明土壤剖面不存在坡度-坡度差异。腐殖质为腐殖酸盐-腐殖酸盐类型。在腐殖酸中，棕色酸占主导地位。黑色腐殖酸的含量略低，不可水解残基的含量则升高。在矿物视界中，主要矿物颗粒上的粘土和铁粘土自生地层指出了微弱的变质过程。在Bm层中，观察到形成薄膜形式的结晶铁化合物和细小的铁偏析。

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