通过人工模拟Cd污染土壤，探究在不同Cd浓度和处理时间下白芍根部Cd积累的特性，以及通过添加水杨酸、脱落酸、锌和硅等外源添加物，对白芍根部Cd含量的影响。结果表明，随着土壤中Cd浓度的上升，根部Cd积累量显著上升。水杨酸和脱落酸处理不会降低根部Cd含量，高浓度的锌和硅降低了植株根部Cd含量。

The Cd accumulation in roots of Paeonia lactiflora Pall are studied by simulation of Cd polluted soil in different concentrations and treatment time. It is researched that the exogenous substances， including salicylic acid， abscisic acid， zinc and silicon， influenced on Cd accumulation in roots of Paeonia lactiflora Pall. The result shows that the Cd content at roots have a significant improvement with the increasing of Cd content in soil. Among 4 Exogenous additives， the SA and the ABA can not cause the reduce of Cd in roots， the high concentration of the zinc and silicon can reduce the Cd concentration in roots.

S567.9

浙江中医药大学校级科研项目(2015ZY33)。