中国农业科学Issue(20)：4293-4300,8.DOI:10.3864/j.issn.0578-1752.2013.20.012
激光衍射法测定中国典型土壤颗粒分布的模型建立与验证
Establishment and Validation of Model of Soil Particle Size Distribution of Main Soils in China by Laser Diffraction Method
摘要
Abstract
[Objective] To improve the accuracy of method measuring soil particle size distribution, the new method was studied.[Method]Twenty soil samples collected from 15 provinces were determined by Laser Diffraction Method and Pipette Method.[Result] Results show that a significant relationship was found between the clay sand contents determined by two different methods. The clay and sand content determined by using the Laser Diffraction Method were obviously lower than that by using the Pipette Method (73.4 g·kg-1 and 59.6 g·kg-1), while the silt content by using the former method was higher than that by using the latter (131.2 g·kg-1). A new alternative model between the two methods was found by studying the particle size cumulative distribution. If the function fitted by particle size cumulative distribution by using Laser Method of a soil is y=1 000x/(b+x), then the function by using Pipette Method is y=1000x/(1.32b-1.01+x).[Conclusion]The soil texture can be judged by the value calculated based on the latter function. The findings demonstrate that data from the Laser Diffraction Method can be directly used to classify soil texture.关键词
土壤粒度分布/土壤质地/激光衍射法/吸管法/转换模型Key words
soil particle size distribution/soil texture/Laser Diffraction Method/Pipette Method/alternative model引用本文复制引用
吴焕焕,吕家珑,段英华,张文菊,徐明岗..激光衍射法测定中国典型土壤颗粒分布的模型建立与验证[J].中国农业科学,2013,(20):4293-4300,8.基金项目
公益性行业农业科研专项（201203030）、国家科技支撑计划项目 （）
