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Rhizosphere enrichment and crop utilization of selenium and metals in typical permian soils of Enshi.
Jiang, Chengfeng; Zhou, Wei; Tu, Shuxin; Yan, Jiali; Yang, Liangzhe.
Afiliación
  • Jiang C; Hubei Provincial Center for Soil Pollution Remediation Engineering, Huazhong Agricultural University, Wuhan, 430070, PR China.
  • Zhou W; Hubei Institute of Geosciences (Hubei Selenium-Rich Industry Research Institute), Wuhan, 430070, PR China.
  • Tu S; Hubei Provincial Center for Soil Pollution Remediation Engineering, Huazhong Agricultural University, Wuhan, 430070, PR China. Electronic address: stu@mail.hzau.edu.cn.
  • Yan J; Hubei Institute of Geosciences (Hubei Selenium-Rich Industry Research Institute), Wuhan, 430070, PR China.
  • Yang L; Hubei Institute of Geosciences (Hubei Selenium-Rich Industry Research Institute), Wuhan, 430070, PR China.
Chemosphere ; 361: 142472, 2024 Aug.
Article en En | MEDLINE | ID: mdl-38810800
ABSTRACT
Enshi, China, is renowned as "Selenium(Se) Capital" where widely distributed soils derived from Permian parent rocks are notably rich in Se, as well as metals, particularly cadmium(Cd). However, the soil enrichment and crop uptake of Se and metals in these high-Se and high-Cd areas are not well understood. To propose the optimal crop planting plan to ensure the safety of agricultural products, we investigated the soils and corresponding typical crops (rice, tea, and maize). The results showed significant soil enrichment of elements, with average contents (mg/kg) as follows Cr (185), Zn (126), Cu (58.8), Pb (31.1), As (15.7), Se (6.85), Cd (5.41), and Hg (0.211). All soil Se contents were above 0.4 mg/kg, indicating Se-rich soils. Se primarily existed in an organic-bound form, accounting for an average proportion of 61.3%, while Cd was mainly exchangeable, with an average of 62.5%. Cd exhibited higher activity according to the Relative Index of Activity (RIA). Nemerow single-factor index analysis confirmed significant soil contamination, with Cd showing the highest level, followed by Cr and Cu, while Pb had the lowest level. Tea exhibited a high Se rich ratio (82.0%) without exceeding the Cd standard. In contrast, corn and rice had relatively lower Se-rich ratios (42.0% and 51.5% respectively) and high rates of Cd exceeding the standard, at 49.0% and 61.0% respectively. Canonical analysis revealed that rice was more influenced by soil factors related to Se and Cd compared to maize and tea crops. Therefore, tea cultivation in the Enshi Permian soil area is recommended for safe crop production. This study provides insights into the enrichment, fractionation, and bioavailability of soil Se, Cd, and other metals in the high-Se and high-Cd areas of permian stratas in Enshi, offering a scientific basis for selecting local food crops and producing safe Se-rich agricultural products in the region.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Selenio / Suelo / Contaminantes del Suelo / Productos Agrícolas / Zea mays / Rizosfera País/Región como asunto: Asia Idioma: En Revista: Chemosphere Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Selenio / Suelo / Contaminantes del Suelo / Productos Agrícolas / Zea mays / Rizosfera País/Región como asunto: Asia Idioma: En Revista: Chemosphere Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido