CAJ | 학술논문

[目的]为了探讨探讨Pb、Cd单一及复合胁迫下桂花幼苗的吸收积累特性。[方法]采用土壤盆栽试验法,以桂花幼苗为对象,选择重金属Pb在浓度梯度0、50、100、500、1000和2000mg/kg,Cd在浓度梯度0、1、10、50、100和200mg/kg/条件下,研究了不同浓度Pb、Cd单一及复合胁迫对桂花幼苗生长的影响。[结果]在试验条件下,土壤Pb含量达到500mg/kg时显著抑制桂花幼苗的生长,土壤Cd含量达到100mg/kg时显著抑制桂花幼苗的生长。桂花幼苗各部分对Pb吸收量的大小顺序为根〉茎〉叶;各部分Cd含量的大小顺序为根〉茎〉叶,但是各部分对Cd吸收量的大小顺序为茎〉根〉叶。[结论]在复合胁迫中,低浓度Pb、Cd处理表现出相互促进吸收积累,高浓度处理表现出相互抑制吸收积累的特性。
[목적]위료탐토탐토Pb、Cd단일급복합협박하계화유묘적흡수적루특성。[방법]채용토양분재시험법,이계화유묘위대상,선택중금속Pb재농도제도0、50、100、500、1000화2000mg/kg,Cd재농도제도0、1、10、50、100화200mg/kg/조건하,연구료불동농도Pb、Cd단일급복합협박대계화유묘생장적영향。[결과]재시험조건하,토양Pb함량체도500mg/kg시현저억제계화유묘적생장,토양Cd함량체도100mg/kg시현저억제계화유묘적생장。계화유묘각부분대Pb흡수량적대소순서위근〉경〉협;각부분Cd함량적대소순서위근〉경〉협,단시각부분대Cd흡수량적대소순서위경〉근〉협。[결론]재복합협박중,저농도Pb、Cd처리표현출상호촉진흡수적루,고농도처리표현출상호억제흡수적루적특성。
[Objective] This study aimed to investigate the characteristics of Pb and Cd uptake and accumulation in Osmanthus fragrans(Thunb.) Lour.under single and combined stress of Pb and Cd.[Method] Pot experiment was adopted with O.fragrans seedlings as experimental materials to investigate the effect of single and combined stresses of Pb and Cd on the growth of O.fragrans seedlings under 0,50,100,500,1 000 and 2 000 mg/kg of Pb and 0,1,10,50,100 and 200 mg/kg of Cd.[Result] Under the experimental conditions,the growth of O.fragrans seedlings was significantly inhibited under moderate Pb stress(500 mg/kg) and high Cd stress(100 mg/kg);the decreasing order of Pb uptake rate of different O.fragrans tissues was root stem leaf;the decreasing order of Cd content of different O.fragrans tissues was root stem leaf,while the decreasing order of Cd uptake rate of different O.fragrans tissues was stem root leaf.[Conclusion] Under combined stress,low concentrations of Pb and Cd can mutually promote the uptake and accumulation,while high concentrations of Pb and Cd can mutually inhibit the uptake and accumulation.