生態農業：農業精準栽培管理技術開發【土壤環境科學系賴鴻裕教授】
| 論文篇名 | 英文：Amendment of husk biochar on accumulation and chemical form of cadmium in lettuce and pak-choi grown in contaminated soil 中文：施用稻殼生物炭對萵苣及白菜累積鎘濃度及其化學型態之影響 |
| 期刊名稱 | WATER |
| 發表年份,卷數,起迄頁數 | 2020, 12 (3):868 |
| 作者 | Chen, Kuei-San; Pai, Chun-Yu; Lai, Hung-Yu(賴鴻裕)* |
| DOI | 10.3390/w12030868 |
| 中文摘要 | 蔬菜累積鎘不但會影響其生長，更會透過食物鏈進入人體之中而造成健康之危害，但植物卻可以將鎘隔離在不同化學型態，進而降低其毒害。本研究將不同品種之萵苣及白菜種植於鎘污染土壤中，利用添加稻殼生物炭提供氮肥並提升土壤酸鹼值，以評估其對上述作物累積鎘行為之影響。研究結果顯示，無論處理為何，有73%以上的鎘貯存於無機的化學型態中，添加生物炭會降低不同生長期作物的生物濃縮係數。透過不同的方式計算食用上述作物之健康風險發現，除了種植於未施用生物炭的白菜外，其餘處理下的作物其危害商數都在可接受之範圍內。 |
| 英文摘要 | Cadmium (Cd) accumulated in vegetables not only affects their growth but can also enter the human body via food chains and lead to various illnesses. Plants can decrease the toxicity by changing the chemical forms of Cd, which include inorganic (FE), water-soluble (FW), pectate- and protein-integrated (FNaCl), undissolved phosphate (FHAc), oxalate (FHCl), and residual forms (FR). Among them, FE and FW chemical forms show higher mobility to translocate upward from roots to shoots compared with the others. Different varieties or cultivars of lettuce and pak-choi were grown in Cd-contaminated soils amended with husk biochar (BC) to replenish nitrogen to the recommended amount and also to raise the soil pH value. More than 73% of the accumulated Cd in the edible organs was compartmentalized in FE chemical form in both leafy vegetables regardless of treatments. In comparison with control, the application of BC decreased the Cd concentrations and bioconcentration factors in the roots and shoots of two leafy vegetables at different growth periods in general. The chemical form and bioaccessible fraction of Cd in the edible blanching tissues were used to calculate the risk of oral intake. The vegetable-induced hazard quotients of lettuce and pak-choi were acceptable except for pak-choi grown in control without applying BC. |
