1. 西北农林科技大学资源环境学院, 陕西 杨陵,712100
2. 西北农林科技大学水土保持研究所, 陕西 杨陵,712100
3. 中国科学院水利部水土保持研究所, 陕西 杨陵,712100
[ "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" ]
纸质出版:2023
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胡健, 辛军伟, 唐梅, 等. 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.
HU Jian, XIN Junwei, TANG Mei, et al. Spatial Distribution Characteristics of Soil Particle Composition on Typical Slopes in the Pisha Sandstone Area[J]. 2023, 37(3): 95-100.
胡健, 辛军伟, 唐梅, 等. 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. DOI: 10.13870/j.cnki.stbcxb.2023.03.013.
HU Jian, XIN Junwei, TANG Mei, et al. Spatial Distribution Characteristics of Soil Particle Composition on Typical Slopes in the Pisha Sandstone Area[J]. 2023, 37(3): 95-100. DOI: 10.13870/j.cnki.stbcxb.2023.03.013.
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。
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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