The effect of environmental factors such as soil moisture,natural soil drought,PEG drought,soil quality,light intensity and light quality on the growth,photosynthesis,camptothecin (CRT) concentration and yield of one-year-old Camptotheca acuminata seedlings were investigated. The CPT distribution in relation to the leaf,stem and root,and response to the environmental factors were analyzed. On the basis of them,we discussed and summarized the cultivation and harvest methods of seedlings with high ...