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中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (15): 74-78.doi: 10.11924/j.issn.1000-6850.casb19010106

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

土壤中阳离子交换量分析方法的优化研究

肖艳霞1,2,赵颖1,王彦君1,董川2   

  1. 1.山西省环境科学研究院;2.山西大学环境科学研究所
  • 收稿日期:2019-01-19 修回日期:2019-05-09 接受日期:2019-02-22 出版日期:2019-05-28 发布日期:2019-05-28
  • 通讯作者: 赵 颖
  • 基金资助:
    国家自然科学基金项目“白洋淀湿地水-土-植被体系碳排放及其调控机理研究”(41601202)；山西省重点研发项目“污灌区土壤-作物体系 复合污染效应及其人体健康风险研究”(201803D221002- 4)；山西省自然科学基金项目“汾河水库上游氮迁移特征及氮源解析研究” (201701D121116)；山西省自然科学基金项目“汾河流域湿地水体富营养化改善调控对水中碳排放的影响研究”(201801D121261)。

Analysis Methods for Cation Exchange Capacity in Soil: Optimization

  • Received:2019-01-19 Revised:2019-05-09 Accepted:2019-02-22 Online:2019-05-28 Published:2019-05-28

PDF (PC)

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摘要： 为了提高土壤中阳离子交换量的检测效率，本研究对其分析方法进行了优化探讨。针对现用标准方法的不足，介绍了一种利用阳离子交换量前处理系统并结合全自动凯氏定氮仪测定土壤中阳离子交换量的快速方法，对离心和蒸馏滴定分析步骤进行了优化改进。在原理不变的前提下，通过实验对仪器的参数进行了最佳选择，得出：乙酸铵搅拌15 min，乙醇淋洗4次，蒸馏5 min。该条件下，通过对国家土壤有证标准物质进行测试，得出本分析方法的精密度和准确度均符合要求。因此，本分析方法操作简便、效率高、准确度和重复性良好，适用于大批量土壤中阳离子交换量的测定。

关键词: 陆地棉, 陆地棉, 衡优12, 抗虫杂交种, 品种选育

Abstract: To improve the detection efficiency of the cation exchange capacity in soil, in view of the deficiency of the present standard, this study puts forward a rapid detection method by combining the pretreatment system of cation exchange capacity and Kjeltec Automatic Azotometer. The analytical steps of centrifugal and distillation titration were optimized and improved. On the premise of constant principle, the parameters of the instrument were optimized. The results were as follows: ammonium acetate was stirred for 15 min; ethanol was used to wash the soil for 4 times, and distilled for 5 min. Under the condition, the precision and accuracy of this analysis method were in accordance with the requirements by testing the national soil certified reference materials. Thus the analysis method is simple, efficient, accurate and reproducible. It is suitable for the determination of the cation exchange capacity in large quantities of soil samples.