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首页> 外文期刊>Soil Science Society of America Journal >Spatial Variability in Properties Affecting Organic Horizon Carbon Storage in Upland Soils
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Spatial Variability in Properties Affecting Organic Horizon Carbon Storage in Upland Soils

机译：影响旱地土壤有机层碳储量的性质的空间变异

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Quantifying the amount and distribution of soil organic carbon (SOC) within natural soils is important for sample design, C budgeting/pool estimation, and understanding SOC turnover at a process level. We examined the distribution of SOC across a typical UK upland, moorland catchment to establish the amount and spatial structure of variability in key soil properties affecting SOC stocks, namely O horizon C content, bulk density (DB) and horizon depth. Organic horizons of Histosols and Gleysols had greater SOC contents but smaller bulk densities than Podzols and Leptosols. Consequently, SOC density differences between soils were minimized and horizon depth variation became crucial to the measurement of SOC stocks. However, individual Podzol profiles stored appreciable amounts of SOC in O horizons (up to 50 kg m–2). Geostatistical analyses showed spatially structured variance in many properties relating to SOC storage at both plot (variograms reaching sills at ranges 3–8 m) and catchment scales (ranges 437–529 m). The increase in variance from plot to catchment scales was large for O horizon depth. However, DB showed complex scale and soil type inter-relationships, with similar variance at different scales. We show that detailed soil investigations spanning multiple spatial scales are necessary to quantify soil C storage properties for purposes of hydro-ecological modeling and C budgeting at small catchment scales. This has implications for upscaling to regional or national soil C databases.
机译：量化天然土壤中土壤有机碳 （SOC）的数量和分布对于样本设计，C 预算/池估计以及理解 < / sup>进程级别。我们研究了SOC在典型的英国高地，高地集水区上的分布，以建立影响SOC的关键土壤性质的变化量和空间结构。储量，即O地平线C含量，堆密度 （D B ）和地平线深度。与Podzols 和钩端草溶胶相比，组织溶胶和水溶胶 的有机层具有更大的SOC含量，但体积密度较小。因此， 土壤之间的SOC密度差异被最小化，并且水平深度变化对于SOC储量的测量变得至关重要。但是，单个Podzol 配置文件在O层中存储了相当数量的SOC（up 至50 kg m –2 ）。地统计分析表明，在两个图上（与图3-8范围内的基石有关的方差），流域和集水区的许多与SOC储量有关的属性都具有空间 结构化方差。规模（范围437–529 m）。对于O地平线 深度，从样地到集水区尺度的方差增加 很大。然而，D B 表现出复杂的尺度和土壤类型的相互关系， 在不同尺度上具有相似的方差。我们显示了跨越多个空间尺度的详细 土壤调查对于定量分析土壤C的储藏特性是必要的，以便进行水生态学建模和C预算。流域规模小。这对升级到区域或国家土壤C数据库具有 的含义。

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    《Soil Science Society of America Journal》 |2009年第5期|1724-1732|共9页
  • 作者

    M.I. Stutter; D.G. Lumsdon; M.F. Billett; D. Low; L.K. Deeks;

  • 作者单位

    Macaulay Institute, Craigiebuckler, Aberdeen AB15 8QH, UK,National Soil Resources Institute, Cranfield University, Okehampton, EX20 2SB, UK;

    Centre for Ecology and Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK,National Soil Resources Institute, Cranfield University, Okehampton, EX20 2SB, UK;

    School of Biological Sciences, Aberdeen University, AB24 3UU, UK,National Soil Resources Institute, Cranfield University, Okehampton, EX20 2SB, UK;

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