Effect of different areas,types,harvest methods on artemisinin content of Artemisia annua

72 wild or cultivated Artemisia annua germplasms from Chongqing,Guangxi and Hunan provinces etc. were studied as experimental material.The results were as follows:(1)artemisinin content was significantly different among Early-maturing,Middle-maturing and Late-maturing.They were arranged in the following order in terms of their artemisinin content:Middle-maturingLate-maturingEarly-maturing;(2) Different A.annua had different morphology even if they were planted under the same condition.Artemisinin content was significant differece in different colour stems,the sequence ranked:white stemyellow and green stempurple stemgreen stem;(3)Dynamic rule of artemisinin content was consistent in different germplasms.The highest content of artemisinin was preflowering stage;(4)artemisinin content was significant difference in different parts,the highest content of artemisinin was in the leaves.