Comparative Study of Particle Size Distribution by Laser Diffraction Method and Pipette Method in Black Soil Region of Northeast China

WANG Bin; ZHENG Fen-li; AN Juan; LV Chun-hua

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Comparative Study of Particle Size Distribution by Laser Diffraction Method and Pipette Method in Black Soil Region of Northeast China

- Comparative Study of Particle Size Distribution by Laser Diffraction Method and Pipette Method in Black Soil Region of Northeast China
- Bulletin of Soiland Water Conservation Vol. 28, Issue 2, Pages: 134-139(2009)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌,712100
  4. 中国科学院研究生院,北京,100049
- 作者简介：
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- Published：2009
- 稿件说明：
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WANG Bin, ZHENG Fen-li, AN Juan, et al. Comparative Study of Particle Size Distribution by Laser Diffraction Method and Pipette Method in Black Soil Region of Northeast China[J]. Bulletin of Soiland Water Conservation, 2009, 28(2): 134-139.
DOI：

WANG Bin, ZHENG Fen-li, AN Juan, et al. Comparative Study of Particle Size Distribution by Laser Diffraction Method and Pipette Method in Black Soil Region of Northeast China[J]. Bulletin of Soiland Water Conservation, 2009, 28(2): 134-139. DOI：

摘要

目前激光衍射法(laser diffraction method

LD)逐步被用于土壤颗粒粒径分布(particle size distribution

PSD)的分析

为了对比LD法和吸管法测定东北黑土区土壤PSD的差异性

采用LD法和吸管法分别对东北黑土区宾州河流域36个土壤剖面不同层次178个土壤样品的PSD值进行了测定与分析。结果表明

同吸管法相比

LD法低估了土壤的黏粒含量

平均低估幅度19.69%

而高估了土壤的粉粒和砂粒含量

平均高估幅度分别为14.66%和5.13%。LD法所得PSD结果依据美国土壤质地分类制判定的土壤质地

相对于吸管法总体由粉黏质偏向粉砂质方向。建立了LD法与吸管法测定PSD结果的转换模型

将LD法测定的PSD结果利用转换模型校正后

其测定的各土壤粒级同吸管法相比

准确度达96.97%～98.71%

判定土壤质地的准确率也达83.15%。

Abstract

Laser diffraction method(LD method) has been regarded as an effective method of measuring soil particle size distribution( PSD) in recent years. In order to compare PSD difference in measurements by LD method and pipette method in black soil region

178 soil samples collected from various layers of 36 soil profiles were analyzed by LD method and traditional pipette method. Results showed that，compared with pipette method，clay content by LD method was under-estimated by 19. 69 0 o，and silt and sand contents were overestimated by 14. 66%and 5. 13%，respectively. According to US soil texture classification

soil texture varied from silt and clay texture to sand and silt texture

compared with pipette method. For clay，silt and sand particles

three PSD transform models between LD method and pipette method were built. When the transform models were used to revise PSD by LD method

the accuracy of measured PSD was 96. 97%~98. 71%and the accuracy of determined soil texture classification reached 83. 15%by LD.

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