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首页> 外文期刊>Transactions of the ASABE >Analysis of an Ion-Selective Electrode Based Methodology for Integrated On-The-Go Mapping of Soil pH, Potassium, and Nitrate Contents
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Analysis of an Ion-Selective Electrode Based Methodology for Integrated On-The-Go Mapping of Soil pH, Potassium, and Nitrate Contents

机译：基于离子选择电极的土壤pH，钾和硝酸盐含量实时标测方法学分析

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摘要

Knowledge of the spatial variation of soil attributes is critical for precision agriculture. On-the-go soil sensors have been able to provide relatively high mapping density while assessing this variation. A new ion-selective electrode (ISE) based approach was developed and tested for simultaneous mapping of soil pH, residual nitrate (NO 3 - ), and soluble potassium (K + ) contents. In this article, results of laboratory experiments investigating the effects of key measurement factors on ISE performance are presented. In addition to four different soils, these factors included: soil/water ratio (SWR), quality of water used for electrode rinsing (QWR) and for ion extraction (QWE), presence of ionic strength adjuster (ISA), and solution agitation (stirring). After the targeted ion activity presented by different soils, SWR was the second most influential factor causing increased measurement variance, while the influence of QWE was only significant for pH measurements. Based on this study, the following measurement parameters were recommended: agitated purified water extraction without ISA, addition of a fixed amount of water (preferably 1:1 soil/water ratio), and use of regular (tap) water for electrode rinsing
机译：了解土壤属性的空间变化对于精准农业至关重要。流动土壤传感器能够在评估这种变化的同时提供相对较高的测绘密度。开发了一种基于离子选择电极（ISE）的新方法，并进行了测试，可同时绘制土壤pH，残留硝酸盐（NO 3 -）和可溶性钾（K < sup> + ）的内容。本文介绍了实验室研究的结果，这些结果研究了关键测量因素对ISE性能的影响。除四种不同的土壤外，这些因素还包括：土壤/水比（SWR），用于电极冲洗（QWR）和用于离子提取（QWE）的水的质量，离子强度调节剂（ISA）的存在以及溶液搅拌（搅拌）。在不同土壤呈现目标离子活性之后，SWR是第二大影响因素，导致测量方差增加，而QWE的影响仅对pH测量有意义。根据这项研究，建议使用以下测量参数：不使用ISA的搅拌纯净水萃取，添加固定量的水（最好是1：1的土壤/水比）和使用常规（自来水）进行电极冲洗

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