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Depletion of selenium in soil solution due to its enhanced sorption in the rhizosphere of soybean
https://repo.qst.go.jp/records/44118
https://repo.qst.go.jp/records/44118514ed5ce-9328-4a50-9e60-2f5c22262ade
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-05-31 | |||||
| タイトル | ||||||
| タイトル | Depletion of selenium in soil solution due to its enhanced sorption in the rhizosphere of soybean | |||||
| 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 |
Nakamaru, Yasuo
× Nakamaru, Yasuo× Tagami, Keiko× Uchida, Shigeo× 中丸 康夫× 田上 恵子× 内田 滋夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The effect of plant roots on selenium (Se) mobility in soil was studied by a large-scale pot experiment in order to understand the environmental behavior of Se in agricultural soils under plant growth conditions. Soybean plants (Glycine max (L.) Merrill) were grown in a greenhouse for 84 d. The concentrations of Se and major elements (K, Ca, Mg, Na, and Al) in the soil solutions and in the plants were measured at different growth periods. Concentrations of Se and major cations in soil solution decreased as the soybean plants grew, while the concentrations of Al increased. It was assumed that the soybean roots released H+ with the uptake of cations; consequently, due to the acidification of the rhizosphere, Al3+ was released starting from the soil solid phase. The decreased Se concentration in the soil solution should be due to the enhancement of Se sorption onto the soil solid phase. The increase of Se sorption level in the rhizosphere was examined in a small-scale pot experiment. The soil-soil solution distribution coefficient of Se (Kd-Se) was observed as an index of Se sorption level. Kd-Se clearly increased in the rhizosphere soil after cultivation. The effects of pH and Al3+ in the rhizosphere on Se sorption were assessed by Kd-Se measurements at different levels of HCl and AlCl3. In this third experiment, a decrease in pH increased Kd-Se values, but no specific effect was observed on Se sorption due to increased Al3+. These results show that the Se mobility in agricultural soil could be decreased by plant roots under plant growth conditions due to enhanced Se sorption in the rhizosphere. |
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| 書誌情報 |
Plant and Soil 巻 278, 号 1/2, p. 293-301, 発行日 2005-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0032-079X | |||||
