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首页> 外文期刊>Geoderma: An International Journal of Soil Science >The use of quantified structural descriptors to physically characterise stockpiled milled peat of different genetic origins.
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The use of quantified structural descriptors to physically characterise stockpiled milled peat of different genetic origins.

机译：使用量化的结构描述符来物理表征不同遗传来源的储存的碾碎泥炭。

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摘要

Recent research examining water movement in milled peat stockpiles has focused on macroscale physical data. Structure is important with respect to water movement and storage; the number, shape and size of macropores is thought to be particularly important in influencing by-pass flow. A study of pore structures quantified by image analysis techniques was conducted starting with a field impregnation to produce undisturbed polished blocks from stockpiled milled peat of fen and raised bog origins. Samples were prepared in two orientations and characterized in two dimensions, parallel and orthogonal to the stockpile surfaces. Milled peat stockpile structure was found to be layered, with the surface layers typically twice as porous, but with half the number poroids of, the main body of the stockpile. This structure created a discontinuity between surface and sub-surface structures which was thought to be the result of rain, wind and gravity removing finer particles from the surface. Quantified evidencesuggested that the milling processes differed in detail (smaller pores and finer particles from the fen peat). The quantified pore structures were consistent with the current hypothesis regarding milled peat stockpile rewetting mechanisms such as by-pass flow and finger storage. This suggested that structural properties are a more useful indication of rewetting mechanisms than a classification based only on peat density.
机译：最近研究碾碎泥炭堆中水运动的研究集中在宏观物理数据上。结构对于水的流动和存储很重要;大孔的数量，形状和大小被认为对影响旁路流量特别重要。通过图像分析技术对孔结构进行了研究，从田间浸渍开始，从堆积的芬芳和升高的沼泽碾磨泥炭中生产出不受干扰的抛光砖。样品在两个方向上制备，并具有二维特征，平行于和正交于储存表面。发现碾磨过的泥炭堆状结构是分层的，其表层通常是多孔主体的两倍，但具有的数量为类桩主体的类弧状。这种结构在表面和亚表面结构之间产生了不连续性，这被认为是雨，风和重力作用从表面去除了细颗粒的结果。量化的证据表明，研磨过程在细节上有所不同（孔雀石的细孔和细颗粒）。定量的孔结构与关于磨碎的泥炭堆再润湿机制（例如旁路流量和手指储存）的当前假设一致。这表明，与仅基于泥炭密度进行分类相比，结构性质是重新润湿机理更有用的指示。

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