Determination of the Source of Bioavailable Sr Using 87Sr/86Sr Tracers: A Case Study of Hot Pepper and Rice
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- 作者：Byeong-Yeol Song ; Jong-Sik Ryu ; Hyung Seon Shin ; Kwang-Sik Lee
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2014
- 出版时间：September 24, 2014
- 年：2014
- 卷：62
- 期：38
- 页码：9232-9238
- 全文大小：396K
- ISSN：1520-5118
文摘
The geographical origin of agricultural products has been intensively studied, but links between agricultural products and the environments are poorly established. Soils, water (streamwater and groundwater), and plants (hot pepper, Capsicum annuum; and rice, Oryza sativa) were collected from all regions of South Korea and measured Sr isotope ratios (87Sr/86Sr). Sequential leaching of soil showed that Sr in the exchangeable and carbonate fractions (bioavailable) had a lower 87Sr/86Sr ratio than that in the silicate fraction, consistent with a low 87Sr/86Sr ratio in the plant. Although the bedrock鈥搒oil鈥搘ater鈥損lant system is closely linked, statistical analysis indicated that 87Sr/86Sr ratios of the plant showed the greatest agreement with those of water and the exchangeable fraction of soil. This study is the first report of 87Sr/86Sr isoscapes in South Korea and first demonstrates that the agricultural product is strongly linked with the exchangeable fraction of soil and water.