| 用沉降法和激光法测定土壤粒度的对比研究 |
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| 引用本文： | 李学林,李福春,陈国岩,谢昌仁,王金平,李文静.用沉降法和激光法测定土壤粒度的对比研究[J].土壤,2011,43(1):130-134. |
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| 作者姓名： | 李学林 李福春 陈国岩 谢昌仁 王金平 李文静 |
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| 作者单位： | 南京农业大学资源与环境科学学院,南京,210095 |
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| 基金项目： | 国家自然科学基金项目 （40571088和40971138）和教育部留学回国人员基金项目（G200406）资助 |
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| 摘 要： | 分别用激光粒度仪和沉降法测定了古水稻土剖面100个样品和下蜀黄土剖面105个样品的粒度分布。对两种测定方法所获结果进行了系统的对比分析。研究结果认为:①沿垂直剖面采集的系列样品不适合于讨论两种方法之间的相关性,质地多样化的表层土壤样品组合较适合讨论该问题;②对于黏粒和砂粒来说,两种方法之间的相关性很好,它们的相关系数分别为0.98和0.93,但激光法所测结果低于沉降法。对于粉粒来说,激光法所测结果明显高于沉降法,但两种方法之间的相关性较差;③沉降法和激光法都不可能测得"真实的"粒度,它们的结果反映了同一样品在不同方面表现出的粒度特点。
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| 关 键 词： | 激光粒度仪 沉降法 粒度 对比研究 |
Comparative study on grain-size measured by laser diffraction and sedimentation techniques |
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| LI Xue-lin,LI Fu-chun,CHEN Guo-yan,XIE Chang-ren,WANG Jin-ping,LI Wen-jing.Comparative study on grain-size measured by laser diffraction and sedimentation techniques[J].Soils,2011,43(1):130-134. |
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| Authors: | LI Xue-lin LI Fu-chun CHEN Guo-yan XIE Chang-ren WANG Jin-ping LI Wen-jing |
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| Institution: | College of Resources and Environmental Sciences, Nanjing Agricultural University |
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| Abstract: | Grain-size distributions of ancient paddy soil(n = 100) and Xiashu loess(n = 105) were measured by laser diffraction and sedimentation techniques,the measured results of the two methods were not comparable for soil samples from the vertical-profile series,but comparable for topsoil samples with different textures.Significant correlations between clay fractions and sand fractions existed in the two methods(r = 0.98 and 0.93,respectively).Both clay and sand fractions obtained by laser diffraction were lower t... |
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| Keywords: | Laser-particle-sizer Analyzer Sedimentation techniques Grain-size Comparative study |
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