Soil water repellency and chemical soil properties in a beech forest soil — Spatial variability and interrelations
Soil water repellency and chemical soil properties in a beech forest soil — Spatial variability and interrelations
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山毛榉林土壤中的土壤防水性和化学土壤特性 â 空间变异性和相互关系
DOI：
10.1016/j.geoderma.2016.02.013
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发表时间：
2016
期刊：
影响因子：
6.1
通讯作者：
Bachmann
中科院分区：
文献类型：
--
作者：
Krueger;Böttcher;Schmunk;Bachmann
由于树干茎流入渗导致较高的溶质输入，增强了树基附近的土壤酸化。渗透驱动的土壤化学性质如pH值、碳氮比（C/N）和颗粒表面性质如氧碳比（O/C）的改变，也可能影响土壤润湿性，随着酸度的增加，土壤防水性（SWR）有增加的趋势。本研究以山毛榉林土壤为研究对象，通过土壤水分入渗和土壤含水率的变化，揭示了土壤化学性质和物理性质之间的联系（Δ = 1 m，5 m × 8 m = 40 m2），为了揭示树干茎流对土壤性质的直接影响，我们沿着一行取样（Δ z = 0.8 m，l = 46.60 m），不同采样点到树的距离。所有样品均在山毛榉（Fagus sylvaticaL.）标准统计学和地统计学方法的空间变异性分析表明，网格和样带样品之间的pH值和硫酸盐，铝，铁（铝和铁草酸提取物）浓度和接触角（CA，座滴法）测定的土壤样品的SWR没有实质性差异。根据标准统计量，土壤化学性质和土壤含水率的总方差与茎流入渗模式无关。光谱方差分析结果表明，酸化（pH值，铝含量）以及SWR的空间变异性的强烈影响的模式，有和没有茎流渗透或分布的山毛榉树，分别斑块。在或多或少有规律种植的山毛榉林中，这导致了土壤酸化和土壤持水率的周期性变化，随着土壤酸度的增加，土壤持水率（CA范围为17 °-72 °）有增加的强烈趋势。通过X射线光电子能谱分析的特定化学表面性质，如O/C比（r2 = 0.782）和非极性C物种的量（r2 = 0.768）以及表面Al浓度（r2 = 0.867）清楚地显示出与CA的强烈关系。因此，茎流入渗模式对土壤的SWR有很大的影响。C/N、硫酸盐和铁含量与土壤持水率和土壤酸度无显著关系。
Higher solute input due to stemflow infiltration causes enhanced soil acidification near the tree base. Infiltration-driven alteration of chemical soil properties like pH, and carbon to nitrogen ratio (C/N) and particle surface properties like oxygen to carbon ratio (O/C), may also affect soil wettability with a trend to increased soil water repellency (SWR) with increased acidity. Our study provides a link between chemical soil quality and physical behavior with respect to soil water infiltration and SWR, respectively in a beech forest soil.The spatial variability of soil properties was analyzed within a grid (Δ = 1 m, 5 m × 8 m = 40 m2) and, to reveal direct effects of stemflow influence on soil properties, we sampled along a tree row (Δz = 0.8 m, l = 46.60 m) with varying sampling points to tree distances. All samples were taken in a beech (Fagus sylvaticaL.) forest Bws/Bw-horizon in 0.1–0.2 m depth (dystric cambisol).Analysis of spatial variability by standard statistics and geostatistical methods revealed no substantial differences between grid and transect samples for pH and sulfate, Al, and Fe (aluminum and iron oxalic acid extractable) concentration and SWR in terms of contact angle (CA, sessile drop method) measured for bulk soil samples. According to standard statistics, the total variance of chemical soil properties and SWR was independent of stemflow infiltration pattern. Results of spectral variance analysis showed that the spatial variability of acidification (pH, Al content) as well as SWR was strongly affected by the pattern of patches with and without stemflow infiltration or the distribution of beech trees, respectively. In a more or less regularly planted beech forest this caused a cyclic variation of soil acidification and SWR with a strong trend to increased SWR (CA ranges 17°–72°) with increased soil acidity. Specific chemical surface properties, analyzed via X-ray photoelectron spectroscopy, like O/C ratio (r2= 0.782) and the amount of nonpolar C species (r2= 0.768) as well as surface Al concentration (r2= 0.867) clearly showed a strong relation to CAs. Hence, SWR was strongly affected by stemflow infiltration patterns into soil. For C/N, sulfate, and Fe content no significant relations to SWR or soil acidity were found.
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DOI：
--
发表时间：
2015
期刊：
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DOI：
--
发表时间：
1989
期刊：
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DOI：
--
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1973
期刊：
影响因子：
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G. Hieftje;B. E. Holder;A. Maddux;R. Lim
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DOI：
--
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1988
期刊：
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