| 乙酸铵交换-全自动凯氏定氮法测定贵州某地区耕地土壤阳离子交换量 |
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| 引用本文： | 邓昭祥,钟蕾,况云所,邓云江,杜作灵,张安丰,杨健,张舟.乙酸铵交换-全自动凯氏定氮法测定贵州某地区耕地土壤阳离子交换量[J].贵州地质,2020,37(4):558-562. |
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| 作者姓名： | 邓昭祥 钟蕾 况云所 邓云江 杜作灵 张安丰 杨健 张舟 |
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| 作者单位： | 贵州省地质矿产中心实验室，贵州贵阳550018 |
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| 基金项目： | 陕西省科技计划资助项目（2018GY￣099）；陕西省省级大学生创新创业训练计划资助项目（201832051） |
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| 摘 要： | ：为分析无机结合料稳定铁尾矿用作半刚性路面基层的水稳定性，对铁尾矿进行筛分，通过测定改良铁尾矿混合料的液限、塑限，确定无机结合料稳定类型，按二级及二级以下公路路面基层的集料级配要求改良铁尾矿，以击实试验确定无机结合料稳定时最佳含水率和最大干密度，然后用半刚性基层冲刷量灰色预估模型计算并分析其抗冲刷性。结果表明：铁尾矿为特细集料，液限为19%，塑性指数为11，宜采用水泥进行稳定，掺加级配碎石改良铁尾矿满足CC3集料级配要求，当水泥剂量为5%时能够取得良好的抗冲刷性能和经济性。
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| 关 键 词： | 铁尾矿 路面基层 抗冲刷性 |
| 收稿时间： | 2020/4/29 0:00:00 |
Determination of Cation Exchange Capacity of Cultivated Soil in a Certain Area of Guizhou by Ammonium Acetate Exchange-Automatic Kjeldahl Method |
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| DENG Zhao-xiang,ZHONG Lei,KUANG Yun-suo,DENG Yun-jiang,DU Zuo-ling,ZHANG An-feng,YANG Jian,ZHANG Zhou.Determination of Cation Exchange Capacity of Cultivated Soil in a Certain Area of Guizhou by Ammonium Acetate Exchange-Automatic Kjeldahl Method[J].Guizhou Geology,2020,37(4):558-562. |
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| Authors: | DENG Zhao-xiang ZHONG Lei KUANG Yun-suo DENG Yun-jiang DU Zuo-ling ZHANG An-feng YANG Jian ZHANG Zhou |
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| Abstract: | The amount of soil cation exchange is an important indicator of soil fertility retention capacity, buffer performance, and environmental capacity, and an important basis for guiding rational fertilization and soil improvement.In this paper, the ammonium acetate exchange-automatic Kjeldahl method was used to pretreat and determine the CEC samples in the cultivated soil, so as to realize the accurate quantitative determination of the CEC in the cultivated soil. Three national soil reference materials of ASA-4a, ASA-5a and ASA-9 were tested in parallel for 8 times in the laboratory. The test results were: the standard deviation of the three reference materials was 0.28 cmol(+)/kg0.32 cmol(+) /kg, the relative standard deviation is 1.51%3.26%. It has the advantages of good stability, high accuracy and precision of the measurement results, which fully meets the testing requirements of the laboratory and provides a basis for the detection of CEC in soil. This method is used to test the actual samples, and the test results of the inserted standard substances are all qualified, which proves that this method is very suitable for the determination of CEC in the cultivated soil of the land. |
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| Keywords: | Cation exchange capacity Kjeldahl nitrogen analyzer ammonium acetate exchange method cultivated soil |
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