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A Portable Determination Method for the Soil Rapid Available Potassium via Enhanced NaBPh4 Turbidimetry

Monitoring soil rapidly available potassium (RAK) reserves is extremely significant for developing precise fertilizer recommendations. The sodium tetraphenylborate (NaBPh 4 )-spectrophotometer method is applied to the detection of soil RAK content as a speedy, efficient and portable approach. Howeve...

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Published in:Communications in Soil Science and Plant Analysis 2024-09, Vol.55 (16), p.2478-2487
Main Authors: Lu, Qinwen, Wang, Ruijing, Li, Mengya, Wei, Liman, Chang, Yongjia, Guo, Hongyan, Cao, Qiao, Chen, Xiangyu
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container_issue 16
container_start_page 2478
container_title Communications in Soil Science and Plant Analysis
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creator Lu, Qinwen
Wang, Ruijing
Li, Mengya
Wei, Liman
Chang, Yongjia
Guo, Hongyan
Cao, Qiao
Chen, Xiangyu
description Monitoring soil rapidly available potassium (RAK) reserves is extremely significant for developing precise fertilizer recommendations. The sodium tetraphenylborate (NaBPh 4 )-spectrophotometer method is applied to the detection of soil RAK content as a speedy, efficient and portable approach. However, the detection accuracy of this method is inferior to the ammonium acetate (NH 4 OAc)-flame photometer method. Here, the detection processes of the NaBPh 4 turbidimetry were optimized to find the correlation with the NH 4 OAc method, further discussed the reasons for the different results by the two methods. The maximum relative error is 13% after conversion through the calibration curve. In addition, the accuracy of the calibration curve was verified by selecting non-fitting soil samples from two experimental sites. Therefore, our work proposes that the NaBPh 4 turbidimetry, more convenient and rapid, can accurately detect the soil RAK content in the field. It provides an experimental guidance for the detection method of soil RAK content based on ultraviolet detection and on-site rapid detection devices.
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subjects Accuracy
Acetates
Acetic acid
Ammonium
Ammonium acetate
Ammonium acetate-flame photometer method
Ammonium compounds
Calibration
Environmental monitoring
Fertilizers
Photometers
plant analysis
Portability
Potassium
rapid methods
Sodium
sodium tetraphenylborate turbidimetry
Soil
soil nutrients detection
soil rapidly available potassium
Soils
Spectrophotometers
Turbidimeters
Turbidimetry
title A Portable Determination Method for the Soil Rapid Available Potassium via Enhanced NaBPh4 Turbidimetry
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