Estimation of Plant-Unavailable Iodine Concentrations in Agricultural Fields
作者： Keiko Tagami , Shigeo Uchida , Akira Takeda , Shin-ichi Yamasaki , None
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摘要: In this study, a method for the estimation of plant-unavailable I concentrations in soils was developed. Concentrations total and potentially plant-available (i.e., water-soluble organically bound I) were measured 141 agricultural soil samples. For measurements, pressed powder pellets prepared from samples, by energy dispersive x-ray fluorescence. Potentially contents inductively coupled plasma mass spectrometry after samples had been extracted with tetramethyl ammonium hydroxide their soluble (TMAH-extractable I). The results showed high correlation between TMAH-extractable concentrations. geometric means paddy field 1.9 1.1 mg kg ―1 dry weight, respectively, while those upland 5.7 4.2 respectively. having <5 I, it estimated that average fields 0.7 ± 0.2 0.4 ― 1 different two uses could be explained differences redox conditions; is mobile under reducing conditions so removed leaching plowed layer or volatilization soil.
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