中文摘要：

以果园棕壤土和3年生盆栽苹果（Malus domestica Borkh．）为试验材料，研究引入蚯蚓和有效微生物群（EM）后，土壤对镉离子（Cd^2＋）的吸附-解吸行为及苹果根系和果实镉含量的变化。结果表明，随着土壤Cd^2＋含量增加，土壤对Cd^2＋的吸附率降低，解吸率提高；Langmuir方程显示，经过蚯蚓和EM处理的土壤对Cd^2＋的吸附强度和对Cd^2＋的最大缓冲容量（MBC）下降；在土壤Cd^2＋含量较高时，蚯蚓和EM降低了土壤对Cd^2＋的吸附率，提高了解吸率，EM效果更明显。苹果根系和果实镉含量随着土壤施Cd^2＋而增加，蚯蚓和EM明显促进根系对镉的吸收及镉在果实中的积累，在土壤镉含量较高时，蚯蚓和EM的作用更显著。

英文摘要：

The Cd^2＋ adsorption - desorption in soil and the content Of Cd^2＋ in roots and fruits were studled by treatment with the earthworm and effective microorganisms （EM）, using the orchard brown soils and potted three-year-old apple trees （Malus domestica Borkh. ） as materials. The results showed that the adsorption ratio of the Cd^2＋ in the soils reduced and the desorption ratio of Cd^2＋ enhanced as the soil Cd^2＋. concentration increasing. According to the Langmuir equation, the adsorption strength and the maximum buffering capacity （MBC） of the soil to Cd^2＋ decreased after the soil was treated with the earthworm and EM. The earthworm and EM reduced the adsorption ratio of the soil for Cd^2＋ and increased Cd^2＋ desorption ratio in the soil of higher Cd^2＋ concentration. And the EM had more obvious effect compared with earthworm. In the root and fruit, Cd content increased with Cd^2＋ concentration increasing in the soil. The earthworm and EM significantly promoted the uptake of Cd^2＋ in the root and the accumulation of Cd^2＋ in the fruit, and the effect was more remarkable when the Cd^2＋ concentration was higher in the soil.