- 期刊
汞與甲基汞對蔬菜危害與蓄積影響之研究
Effect of Mercury and Methyl Mercury on Retarding Vegetable's Growth and Accumulation Status
摘要
近年來有害重金屬汞污染土壤的問題日益嚴重。汞可分成有機汞與無機汞兩大類，為了瞭解食用的短作植物葉菜類受汞與甲基汞污染的影響，利用水耕與土耕方式培養短作植物油菜、青江菜及小白菜植株。在含汞（0－0.2 μg/mL）及甲基汞（0－0.2 μg/mL）的水耕培養液中與含汞（0－1 μg/g）及甲基汞（0－1 μg/g）培養土中種植30天。蔬菜發芽率試驗顯示汞與甲基汞會造成短期作物油菜、青江菜及小白菜種子發芽的抑制，含汞濃度0.1 μg/mL時，種子發芽率降至87－94%；而甲基汞濃度0.1 μg/mL時，種子發芽率降至66－81%。植株生長隨著汞與甲基汞濃度越高抑制生長越為嚴重，甲基汞試驗組最為明顯。三種蔬菜的根部及葉莖部總汞吸收量檢測結果，甲基汞組高於汞組，土耕試驗亦較水耕試驗呈現有較高的甲基汞吸收值。汞試驗組中甲基汞的檢測發現蓄積的汞並不會轉變成甲基汞。
並列摘要
In recent years, accumulation of harmful heavy metals like mercury in the soil, has become one of the major toxic metal contamination in the farm land. Two major categories of mercury, organic mercury and inorganic mercury, may affect crops with mercury accumulation. To understand the absorption of mercury and methyl mercury by leaf vegetables, and the scope of plants' injuries, the Field-mustard, Ching-geeng and Pakchoi were tested by the way of hydroponic cultivation and soil cultivation. Mercury (0-0.2 μg/mL) and methyl mercury (0-0.2 μg/mL) in medium of hydroponic cultivation and mercury (0-1 μg/g), methyl mercury (0-1 μg/g) in soil cultivation were used for 30-day cultivation. Seed germination tests showed that the mercury and methyl mercury hindered Field-mustard, Ching-geeng and Pak-choi seed germination. The germination rate of seeds decreased to 87-94% and 66-81% by 0.1 μg/mL of mercury and methyl mercury, respectively. Higher mercury and methyl mercury concentrations severely inhibited the growth of plants in the experiment, while the methyl mercury groups caused more damage. The roots and leaves had higher total mercury concentrations in tested methyl mercury groups than in mercury groups. Soil cultivation groups had higher methyl mercury absorption than hydroponic cultivation. In methyl mercury trials, we found that the accumulated mercury did not transform into methyl mercury.