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首页> 外文期刊>Geoderma: An International Journal of Soil Science >Multifractal characteristics of soil particle distribution under different vegetation types in the Yellow River Delta chenier of China
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Multifractal characteristics of soil particle distribution under different vegetation types in the Yellow River Delta chenier of China

机译：中国黄河三角洲不同植被类型土壤颗粒分布的多重分术特征

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摘要

Vegetation restoration on degenerated cheniers in the Yellow River Delta of China is important to maintain the ecosystem stability in the muddy coastal zone. This study mainly investigates the multifractal characteristics of the soil particle distributions under different vegetation types on a Yellow River Delta chenier, reveals the fractal mechanism of soil improvement by vegetation, and identifies the types of vegetation that provide the best remediation effects on the texture of degenerated chenier soils. Three vegetation types, including two shrub-grass communities, Ziziphus jujuba var. spinosa-Artemisia mongolica (ZA) and Periploca sepium Bunge-Messerschmidia sthirica (PM), and one mixed herbaceous community, Artemisia mongolica-Phragmites australis (AP) at the beach ridge of the Yellow River Delta were used as the study subjects, and bare land was used as the control (CK). The results showed that (1) the shell sand under the different vegetation types had the highest sand contents, with low silt and clay contents, and exhibited a nonuniform soil particle distribution with obvious heterogeneity. Restoration of shrub-grass communities can reduce the heterogeneity of the particle size distribution (PSD) of shell sand by increasing the range of the PSD and its degree of concentration in dense areas. (2) The shrub-grass communities can increase the clay and silt contents and decrease the sand content of shell sand. The shrub-grass communities were more effective than the mixed herbaceous community in refining the soil texture, and the ZA exhibited the strongest shell sand particle refinement capability. (3) The shell sand in the different soil layers under the different vegetation types had significantly different capacity dimensions (D-0), information dimensions (D-1), correlation dimensions (D-2), and D-1/D-0 and D-0-D-1 ratios (P < 0.05). The multifractal parameters of the shell sand were correlated to the soil depth. With increasing soil depth, the correlations of D-1, D-2, and D-1/D-0 with the clay, silt, and sand contents weaken. (4) The coarseness and nonuniformity of the texture of the shell sand under the shrub-grass communities were significantly lower than those on bare land. Shrub-grass communities can control wind erosion of the soil surface, preventing the coarsening of topsoil and promoting the accumulation of fine particles. The shrub-grass communities were more effective than the mixed herbaceous community in improving the soil structure; furthermore, the ZA was better than the other communities in improving the soil structure. Additionally, the degree of soil improvement in the 10-30 cm layer was better than that in the 0-10 cm layer.
机译：中国黄河三角洲退化的陈代料植被恢复对于维持泥泞沿海地区的生态系统稳定性是重要的。本研究主要研究了黄河三角洲不同植被类型下的土壤粒子分布的多重分形特征，揭示了植被土壤改善的分形机制，并确定了为退化纹理提供最佳修复影响的植被类型Chenier土壤。三种植被类型，包括两种灌木 - 草群，Ziziphus Jujuba var。 Spinosa-Artemisia Mongolica（Za）和Periploca sepium bunge-messerschmidia sthirica（PM）和一个混合的草本群岛，黄河三角洲沙滩岭的Artemisia Mongolica-Phragmites Australis（AP）被用作研究科目，并且裸露土地被用作控制（CK）。结果表明，（1）不同植被类型下的壳砂具有最高的砂内容物，具有低淤泥和粘土含量，并具有明显的异质性的不均匀土壤颗粒分布。通过增加PSD的范围及其致密区域中的浓度，灌木草群的恢复可以降低壳砂的粒度分布（PSD）的异质性。 （2）灌木草群可以增加粘土和淤泥含量，降低壳砂的砂含量。灌木草群在精炼土壤纹理方面比混合草本群落更有效，ZA表现出最强的壳体砂颗粒细化能力。 （3）在不同植被类型下的不同土壤层中的壳砂具有显着不同的容量尺寸（D-0），信息尺寸（D-1），相关尺寸（D-2）和D-1 / D- 0和D-0-D-1比率（P <0.05）。壳体砂的多分乳酸分术参数与土壤深度相关。随着土壤深度的增加，D-1，D-2和D-1 / D-0的相关性与粘土，淤泥和砂含量削弱。 （4）灌木草社区下壳砂质地的粗糙度和不均匀性显着低于赤土土地。灌木草群可以控制土壤表面的风蚀，防止粗糙的粗糙化并促进细颗粒的积累。灌木草群在改善土壤结构方面比混合草本群落更有效;此外，ZA优于改善土壤结构的其他社区。另外，10-30cm层的土壤改善程度优于0-10cm层中的土壤改善。

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