Abstract: The study of the allelopathy has a great significance to the understanding of the formation and succession of plant population, the rotation and intercropping of crops, the reforestation etc. This artical gives a brief introduction to the concept of alletopathy, its history and present situation and the significance of its research in the ecology, agriculture and forestry.

Key words: Trophic condition, Chlorella protothecoides, Anthracene, Bioaccumulation, Degradation