Abstract: In order to establish the effects of different soil selenium content, soil moisture content and pH value on the selenium accumulation in tea plant, Zhongcha 108 was used as investigation materials, including pot experiment and a hydroponic experiment. The result showed that the selenium content in tea plant and the soil selenium content were positively correlated. Drought stress reduced the absorption rate of tea plant from soil. When the soil moisture content was 90%, the root accumulated the highest selenium(0.527βmg·kg^-1), and showed extremely significant difference with that planted in the soil moisture content was 50%(0.301βmg·kg^-1). Under different pH conditions, the leaves from various treatments accumulate the selenium at the rich-selenium level within 72 hours, and there is no significant difference in leaves between various treatments. After 28 days, there is a significant difference between leaves from various treatments. The highest selenium content of leaves appeared while the pH value is 3.5, significantly higher than those in other treatments. It can be inferred that soil selenium content, soil moisture content and pH value is closely related to the selenium accumulation of tea plant.

Key words: soil selenium content, soil moisture content, pH value, tea[Camellia sinensis (L.) O. Kuntze] selenium accumulate