CAJ | 학술논문

通过盆栽试验研究了重金属铅、镉单一和复合污染及其与常量元素钙、微量元素锌的交互作用对韭菜植株生长发育和Pb、Cd在其根、叶中迁移富集规律的影响。韭菜中Pb、Cd的含量用电感耦合等离子体质谱（ICP-MS）测得。结果表明，韭菜对Pb或Cd的吸收量与土壤单一Pb或Cd污染程度正相关；Pb/Cd之间存在复杂的交互作用，低浓度复合时相互促进吸收，高浓度复合时优先吸收Cd而抑制韭菜对Pb的吸收；锌在高浓度Pb/Cd污染时表现出优良的拮抗作用，可有效降低Pb、Cd的生物有效性并促进韭菜生长。韭菜根是富集Pb、Cd的主要部位，但受代谢方式、迁移率等因素的影响，因而在根、叶中的分布存在差异；根与叶中Cd的浓度比为1.5左右，Pb浓度比主要为2.5~4.5之间，显示Cd更易迁移至韭菜叶组织中。
통과분재시험연구료중금속연、력단일화복합오염급기여상량원소개、미량원소자적교호작용대구채식주생장발육화Pb、Cd재기근、협중천이부집규률적영향。구채중Pb、Cd적함량용전감우합등리자체질보（ICP-MS）측득。결과표명，구채대Pb혹Cd적흡수량여토양단일Pb혹Cd오염정도정상관；Pb/Cd지간존재복잡적교호작용，저농도복합시상호촉진흡수，고농도복합시우선흡수Cd이억제구채대Pb적흡수；자재고농도Pb/Cd오염시표현출우량적길항작용，가유효강저Pb、Cd적생물유효성병촉진구채생장。구채근시부집Pb、Cd적주요부위，단수대사방식、천이솔등인소적영향，인이재근、협중적분포존재차이；근여협중Cd적농도비위1.5좌우，Pb농도비주요위2.5~4.5지간，현시Cd경역천이지구채협조직중。
Ecological effects of heavy metals are often dependent on the presence of other elements. A pot experiment was undertaken to un-derstand the influences of different concentrations of heavy metals(Pb and Cd)and their combinations with Ca, or Zn in soil on growth and Pb and Cd concentrations in the roots and leaves of leeks. Concentrations of Pb or Cd in leeks were positively correlated with those in soils. Lead and Cd had synergism effects at their low concentrations. At high concentrations, however, Pb promoted Cd absorptions, but Cd inhib-ited Pb absorption. Zinc showed excellent antagonistic effects on Pb and Cd under severe pollution by reducing the bio-availability of Pb and Cd, and promoting the growth of leeks. Calcium increased Pb concentrations at low Pb and Cd combined soil, while it inhibited the ab-sorption of Pb at high Pb and Cd combination. Calcium had a very weak inhibitory effect on Cd. Both Pb and Cd were mainly accumulated in roots of leeks. The ratios of Cd in roots to leaves were about 1.5, while those of Pb were 2.5~4.5, indicating easier translocation of Cd than Pb in leeks.