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Estimation of plant unavailable iodine concentrations in agricultural fields
https://repo.qst.go.jp/records/45942
https://repo.qst.go.jp/records/459422f58ec81-4365-4495-81ea-5b64221c1afe
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-11-11 | |||||
| タイトル | ||||||
| タイトル | Estimation of plant unavailable iodine concentrations in agricultural fields | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Tagami, Keiko
× Tagami, Keiko× Uchida, Shigeo× Takeda, Akira× Yamasaki, Shin-ichi× et.al× 田上 恵子× 内田 滋夫× 山崎 慎一 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In this study, a method for estimation of plant unavailable iodine (I) concentrations in soils was proposed. Concentrations of total I and potentially plant available I (i.e. water soluble and organically bound iodine) were measured in 141 agricultural soil samples. For total I measurements, pressed powder pellets were prepared from soil samples and concentrations of I were measured by energy dispersive X-ray fluorescence. Potentially plant available I contents were measured by inductively coupled plasma mass spectrometry after soil samples had been extracted with tetramethyl ammonium hydroxide and their soluble and organically bound I concentrations had been measured (TMAH-extractable I). The results showed a high correlation between the total and TMAH-extractable I concentrations. The geometric means of total and TMAH-extractable I in the paddy field samples were 1.9 and 1.1 mg kg-1-dry, respectively, while those in the upland field soil samples were 5.7 and 4.2 mg kg-1-dry, respectively. For the agricultural soils having less than 5 mg kg-1 total I, it was estimated that the average concentrations of plant unavailable I in paddy fields and upland fields were 0.7+/-0.2 mg kg-1-dry and 0.7+/-0.4 mg kg-1-dry, respectively. The different total I concentrations for fields of the two agricultural uses could be explained by the differences in their redox conditions; I is mobile under reducing conditions so that it was removed from the paddy fields by leaching from the plowed layer or by I volatilization from the soil. | |||||
| 書誌情報 |
Soil Science Society of America Journal 巻 74, 号 5, p. 1562-1567, 発行日 2010-09 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0361-5995 | |||||
