Climate suitable rank distribution of artemisinin content of artemisia annua in China

At the urgent request of Artemisia annua (ART) planting, the paper gets artemisinin content (ARTC) of ART in China from literatures.  The paper analyses the relationships between ARTC and ecological factors by statistical analytical methods.  The paper also analyses the climate suitable rank distribution of ARTC in China by ArcGIS.  The results display that first, ARTC is significantly different in China, that ART from the south regions ARTC is higher.  Greatest north parts of China have not suitable climate for the growing of ART and the ARTC is lower than 0.2%, when ART grows above the 34th degree of northern latitude.  ARTC is higher and ART grows well, when ART grows under the 34°N and grows at the areas between 100°E and 120°E.  Second, subtropical zone is the best suitable climate zone for the growing of ART.  ART grows well and ARTC is higher than 0.5%, when ART grows in the subtropical zone.  Third, temperature, sunshine duration and rainfall are the main ecological factors that affect the growth of ART and the accumulation of ARTC.  That the year temperature between 13.9 ℃ and 22 ℃, sunshine duration between 853 h and 1 507 h, rainfall between 814 mm and 1 518 mm, is the best climate for the accumulation of ARTC.  Temperature between 13 ℃ and 29 ℃, rainfall between 600 mm and 1 300 mm is the best climate for the growth of ART.  Fourth, in northwest of Guangxi, eastern of Sichuan, Guizhou and Yunnan provinces, south Chongqing and west Hunan Province, there are suitable climate for the growth of Artemisia and for the accumulating of ARTC.  There are also some suitable climate areas for the growing of artemisia in the south of Hubei, Anhui and Jiangsu provinces.