用微量吸管法测定红壤颗粒组成的研究  

Particle determination of red soils using micro-pipette method

作　　者：章明奎[1] 姜宏[1] 

机构地区：[1]浙江大学资源科学系,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2001年第6期649-651,共3页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金资助项目 (4 96 0 10 13)

摘　　要：用微量吸管法对红壤颗粒组成进行了研究 ,结果表明 ,用土量 4 .0 0 g,吸液量 5 m L的微量吸管法的测定结果稳定 ,与吸管法无明显差异 ,重现性优于比重计法 ,能满足快速测定的需要 .但用土量太少(2 .0 0 g)或吸液量太少 (2 .5 m L)可能会引起较大的偏差 .It was concluded from the results on a wide range texture of soils that particle composition of red soils could be analyzed effectively with a micro-pipette method (using 4.00 g soil and sampling 5 mL suspension) that have low coefficient of variation with accuracy and precision comparable to pipette method and much higher repeatable than hydrometer method. Micro-pipette method could meet requirement for rapid determination of soil particle composition. However, variability between replicates was higher when only 2.0 g of soil was used or 2.5 mL suspension was sampled in the micro-pipette method.

关 键 词：微量吸管法 颗粒组成 精度 红壤 土壤测定 

分 类 号：S151.95[农业科学—土壤学] S155.25[农业科学—农业基础科学]