砒砂岩区典型坡面土壤颗粒组成空间分布特征研究
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胡健(1996—),男,硕士研究生,主要从事土壤水分入渗研究。E-mail:1760031480@qq.com

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S157.1

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国家自然科学基金项目(42107363)


Spatial Distribution Characteristics of Soil Particle Composition on Typical Slopes in the Pisha Sandstone Area
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    摘要:

    为揭示土壤颗粒组成在垂直和水平方向上的分布规律,采集砒砂岩区典型坡面0—100 cm剖面的土壤,运用经典统计学测定其颗粒组成。结果表明:坡面0—100 cm土壤质地主要为砂壤土(59.21%)和壤砂土(36.40%)。随土层深度增加,砂粒含量增加,粉粒和黏粒含量减少,土壤逐渐呈现粗粒化的趋势;坡面尺度上,表层0—10 cm砂粒为弱变异,其余各层各粒级均为中等程度变异,且随土层深度增加变异性增强,不同粒级的变异系数表现为砂粒<粉粒<黏粒。沿坡面等高线方向,样带B粗粒化程度最弱,10 cm土层以下,样带B粗粒化程度最强。沿垂直坡面等高线方向,坡中砂粒含量(73.60%)相比于坡上和坡下分别增加6.90%(p<0.05)和11.66%(p<0.05),坡下粉粒(31.85%)和黏粒(3.10%)含量相比于坡上和坡中分别增加13.13%(p<0.05),23.59%(p<0.05)和4.36%,51.70%(p<0.05),坡中粗粒化程度最强,坡下是细颗粒堆积的主要区域。研究结果可加强对砒砂岩区坡面土壤颗粒空间分布规律的认识。

    Abstract:

    To reveal the distribution pattern of soil particle composition in vertical and horizontal directions, soils from 0-100 cm layer profiles of typical slopes in the Pisha sandstone area were collected and their particle composition was determined by using classical statistics. Results showed that the soil texture of 0-100 cm layer on the slope was mainly sandy loam (59.21%) and loamy sandy soil (36.40%). With the increase of soil depth, the content of sand increased, the content of silt and clay decreased, and the soil gradually showed a trend of coarse graining. On the slope scale, the sand content in the soil surface layer of 0-10 cm were weakly variable, and the variability of all grain classes in the remaining layers was moderate, and the variability increased with depth, and the coefficients of variation of different grain classes showed that sand < silt < clay. Along the slope contour direction, the coarseness of sample zone B was the weakest, and below the 10 cm layer, the coarseness of sample zone B was the strongest. Along the vertical slope contour direction, the content of sand (73.60%) increased by 6.90% (p<0.05) and 11.66% (p<0.05) in the middle of the slope compared with the top and bottom of the slope, respectively, while the content of silt (31.85%) and clay (3.10%) increased by 13.13% (p<0.05), 23.59% (p<0.05) and 4.36%, 51.70% (p<0.05) in the bottom of the slope compared with the top and middle of the slope. The coarse granulation was the strongest in the middle of the slope, and the bottom of the slope was the main area for the accumulation of fine particles. The results of the study can strengthen the understanding of the spatial distribution pattern of soil particles on the slope of Pisha sandstone area.

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胡健, 辛军伟, 唐梅, 甄庆, 郑纪勇, 张兴昌.砒砂岩区典型坡面土壤颗粒组成空间分布特征研究[J].水土保持学报,2023,37(3):95~100,108

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  • 收稿日期:2022-09-28
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  • 在线发布日期: 2023-05-23
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