| 土壤颗粒分级过程中超声破碎和离心分离的条件选择 |
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| 引用本文： | 吕慧捷,何红波,张旭东.土壤颗粒分级过程中超声破碎和离心分离的条件选择[J].土壤通报,2012(5):1126-1130. |
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| 作者姓名： | 吕慧捷 何红波 张旭东 |
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| 作者单位： | 中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室;中国科学院研究生院;辽宁沈阳农田生态系统国家野外科学观测研究站 |
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| 基金项目： | 国家自然基金重点项目(41130524);国家自然基金面上项目(41071161) |
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| 摘 要： | 按照离心机SORVALL Legend RT的水平转子的尺寸,并根据斯托克斯公式对文献中已有的土壤颗粒分级方法中的离心时间重新设定。同时讨论了利用超声波进行土壤颗粒分散的使用条件,尤其应针对不同的土壤调整超声破碎仪的能量输入。用新优化的土壤颗粒分级方法对中国科学院沈阳生态试验站采集的棕壤进行了分级,其结果与吸管法所得结果基本一致,并且回收率能达到95%以上。
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| 关 键 词： | 水平转子 土壤颗粒分级 超声 离心 |
The Options of Conditions on Ultrasonic Dispersion and Centrifugal Separation in Soil Particle Size Fractionation |
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| LV Hui-jie,HE Hong-bo,ZHANG Xu-dong.The Options of Conditions on Ultrasonic Dispersion and Centrifugal Separation in Soil Particle Size Fractionation[J].Chinese Journal of Soil Science,2012(5):1126-1130. |
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| Authors: | LV Hui-jie HE Hong-bo ZHANG Xu-dong |
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| Institution: | 1,3(1.State Key Laboratory of Forest and Soil Ecology,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110164,P.R.China;2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China;3.National Field Observation and Research Station of Shenyang Agroecosystems,Shenyang 110016,China) |
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| Abstract: | Based on the swing rotor size of SORVALL Legend RT and Stoks’law,a centrifuging procedure was optimized for particle size fractionation of Brown soil.At the same time,the conditions of ultrasonic instrument,especially the input energy to disperse soil was suggested to be adjusted according to the texture of soil.The fractionations of Brown soil under the optimized conditions were in line with those of the standard pipette method,and the recovery was more than 95%. |
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| Keywords: | Swing rotor Soil particle size fractionation Ultrasonic Centrifuge |
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