To compare the polysaccharides( LBLP),total flavonoids( LBLTF) and total phenols( LBLTP) of Lycium barbarum leaves from 14 production areas from Ningxia,Qinghai and Gansu at different harvesting time. Our results showed that there were significant difference of LBLP,LBLTF and LBLTP among different production areas. The LBLP collected from Xiangride township production area,Dulan,Qinghai was as high as 15. 02%. The LBLTF collected from Dagele township production area,Geermu,Qinghai was as high as28. 63%. The LBLTP collected from Keluke township production area,Delingha,Qinghai was as high as 16. 7%. There were also significant difference of these 3 components between different harvest periods. The average LBLP in May( 10. 20%) was significantly higher than that in June( 8. 49%). However,the average LBLTF( 17. 71%) and LBLTP( 12. 77%) in June was significantly higher than that in May( 14. 15%,11. 19%). The LBLTF and LBLTP have a positive correlation with the altitude of production areas,but there was no significant association between LBLP and altitude. The LBLP,LBLTF and LBLTP in different production areas and harvesting time was significant difference,the results provide some references for furthermore development and utilization of L. barbarum leaves.
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