赤子爱胜蚓(Eisenia foetida)对三种土壤Zn、Pb有效态含量的影响

Effects of earthworm(Eisenia foetida)on available Pb and Zn in three soils

以褐土(Cinnamonsoil)、潮棕壤(Aquicbrownsoil)和酸性棕壤(Acidbrownsoil)为供试土壤,通过培养实验,研究了土壤中重金属Zn、Pb对赤子爱胜蚓(Eiseniafoetida)生长率的影响,赤子爱胜蚓(Eiseniafoetida)对不同土壤中有效态Zn、Pb含量的影响,并与野生环境中生长的灰暗异唇蚓(Allolobaphoracaliginosa)进行比较。结果表明:重金属的污染明显抑制了赤子爱胜蚓的生长;赤子爱胜蚓可以显著提高潮棕壤中DTPA-Pb的含量,对DTPA-Zn的含量影响不大;加赤子爱胜蚓,褐土中DTPA-Zn和Pb的含量显著高于加灰暗异唇蚓,潮棕壤中DTPA-Zn的含量和酸性棕壤中大DTPA-Pb的含量则相反。

Three soils, Acid brown soil, Aquic brown soil from Taian, and Cinnamon soil from Jinan ,were used to investigate the effect of earthworm （Eisenia foetida） on available Zn and Pb in three soils. The results indicated that the earthworm＇s （Eisenia foetida ） growth was restrained in three soils of contamination of Zn or Pb. The earthworm activity increased significantly the Pb concentrations of extracted by DTPA in Aquic brown soil, but not enhance the Zn concentrations of extracted by DTPA comparing without earthworm. Both Zn and Pb concentrations of extracted by DTPA in Cinnamon soil with earthworm （Eisenia foetida） were higher than they with earthworm（ Allolobaphora caliginosa ）, but it was contrary to the Zn concentration extracted by DTPA in Aquic brown soil and Pb in Acid brown soil.