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Content Provider | IEEE Xplore Digital Library |
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Author | Zhang Linan Zhang Miao |
Copyright Year | 2013 |
Description | Author affiliation: Key Lab. on Modern Precision Agric. Syst. Integration Res. of Minist. of Educ., China Agric. Univ., Beijing, China (Zhang Linan; Zhang Miao) |
Abstract | Soil potassium testing plays an important role in soil fertilizer recommendation and site-specific fertilization. Conventional detection methods, including soil sampling, sample pretreatment and nutrient determination, are time-consuming and expensive. Ion-selective electrode (ISE) shows great potential in soil macronutrient detection because of its obvious advantages on rapid response, inexpensive cost, simple use and easy integration. In this paper, preliminary experiments were conducted to evaluate the feasibility of self-designed all-solid-state potassium ISE for soil extractable potassium detection with an automatic detection platform. The influences of soil pretreatment parameters, especially the extraction parameters, were discussed. Testing results indicated that $NH_{4}$ cation existing in 1 mol/L $NH_{4}OAc$ extracting solution were too high to greatly degrade the potassium ISE performance. The optimized soil pretreatment parameters to obtain soil potassium extracts for ISE method was shaking 2.5g soil with 25mL Kelowna solution (soil-to-solution ratio 1:10) for 15 minutes. Under these optimized pretreatment parameters, the range of such potassium ISE could detect was from 4.8mg/L to 370.0mg/L. And there were good consistency and correlation between the results determined by potassium ISE and conventional method. It indicted that self-designed all-solid-state potassium ISE combined with the automatic detection platform could basically meet the need of soil extractable potassium rapid detection. |
Sponsorship | IEEE Beijing Sect. |
Starting Page | 947 |
Ending Page | 953 |
File Size | 176943 |
Page Count | 7 |
File Format | |
ISBN | 9781479907571 |
e-ISBN | 9781479907595 |
DOI | 10.1109/ICEMI.2013.6743188 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2013-08-16 |
Publisher Place | China |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Electrodes Soil measurements Instruments Conferences soil pretreatment Soil soil extractable potassium detection ion-selective electrode Standards soil extracting solution Testing |
Content Type | Text |
Resource Type | Article |
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