[1]BAI Xue,YANG Yang,HUANG Tingting,et al.Comparison of Particle Size Distributions Measured by Laser Diffraction Method and Sieve-Pipette Method of Three Typical Soils in China[J].Research of Soil and Water Conservation,2021,28(04):84-90.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 04
Page number:
84-90
Column:
Public date:
2021-08-10
- Title:
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Comparison of Particle Size Distributions Measured by Laser Diffraction Method and Sieve-Pipette Method of Three Typical Soils in China
- Author(s):
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BAI Xue1,2, YANG Yang1,2, HUANG Tingting1,2, WU Xintong1,2, HE Tao1,2, WANG Lijuan3, LIU Baoyuan2
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(1.State Key Laboratory of Earth Surface Processes and Resources Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China; 2.School of Geography, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China; 3.Beijing Ming Tombs Forest Farm, Beijing 102200, China)
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- Keywords:
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particle size distribution; laser diffraction method; sieve-pipette method; Chinese typical soils
- CLC:
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S152.3
- DOI:
-
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- Abstract:
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To investigate the differences of soil particle size distributions(PSD)measured by laser diffraction method(LDM)and the sieve-pipette method(SPM), eight size fractions of 250~2000 μm, 100~250 μm, 53~100 μm, 20~53 μm, 10~20 μm, 5~10 μm, 2~5 μm and <2 μm in three typical soils in China, i.e., black, cinnamon and purple soils were analyzed using LDM and SPM, and the particle size distributions were systematically compared. The results showed that in contrast to SPM, LDM consistently overestimated the fractions of 10~20 μm, 5~10 μm and 2~5 μm and underestimated the clay fractions <2 μm. Although the magnitude of either overestimation or underestimation varied among soil types, the absolute differences of particle fractions measured by LDM and SPM generally increased, as the particle size decreased. For the size fractions >20 μm, by comparison, the proportions determined by LDM could be higher or lower than, or statistically similar with those by SPM, depending on soil types. In the sieved particles of 250~2 000 μm and 100~250 μm obtained by SPM, LDM detected 34.6%~70.1% and 58.1%~70.6% of the corresponding size fractions, respectively, whereas, for those suspensions of the particles <100 μm obtained by SPM, LDM detected 52.7%~98.4% of the corresponding size fractions. The larger particles determined by LDM mostly fell in their neighboring size fractions, and the corresponding percentages exhibited increasing trends as the particle size decreased. The disparate soil PSDs measured by LDM and SPM result from the non-spherical shapes of the soil particles, especially the fine ones, and the specific difference depends on variation among soil types and size fractions.