Feasibility of On-the-go Mapping of Soil Nitrate and Potassium Using Ion-Selective Electrodes

Feasibility of On-the-go Mapping of Soil Nitrate and Potassium Using Ion-Selective Electrodes
复制标题

使用离子选择电极实时测绘土壤硝酸盐和钾的可行性

DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
S. Brouder
S. Brouder
中科院分区：
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文献类型：
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作者：
V. Adamchuk;A. Dobermann;M. Morgan;S. Brouder

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一个用于土壤pH值在线测量的自动土壤采样系统的原型 已开发和评估（文件编号98-3094，99-1100和01-1045）。结果表明 利用离子选择性电极（伊势）在自然湿润土壤上自动绘制土壤pH值图， 是传统手工网格制图的有效替代方法。在这项工作中，应用一个 对绘制钾和硝态氮含量类似技术进行了试验。结果发现 高分子膜K+和NO3 - 离子选择性电极可用于预测其他分析 常用的测量方法（原子吸收光谱法和镉还原法） 土壤实验室当使用直接和间接方法时，观察到显著相关性（R2 = 0.56 - 0.94）。 土壤溶液测量所获得的结果表示K+的实时可用性快照， NO3 - 土壤溶液中的离子，可作为调控变量施用的间接指标 钾或氮肥的施用率与其他空间数据层相结合。
A prototype of an automated soil sampling system for on-the-go measurement of soil pH has been developed and evaluated (Papers No. 98-3094, 99-1100 & 01-1045). It was shown that automated mapping of soil pH using ion-selective electrodes (ISE) on naturally moist soil is an effective alternative to conventional manual grid mapping. In this work the feasibility of applying a similar technique to map potassium and nitrate-nitrogen content was tested. It was found that polymer membrane K+ and NO3 - ion-selective electrodes can be used to predict other analytical measurement methods (atomic absorption spectroscopy and cadmium reduction) commonly used in soil laboratories. Significant correlations (R2 = 0.56 - 0.94) were observed while using both direct and soil solution measurements. Obtained results represent snapshots of real-time availability of K+ and NO3 - ions in soil solution, which could be used as indirect indicators for adjusting variable application rates of potassium or nitrogen fertilizers in combination with other layers of spatial data.