In order to determine the special fertilizer formula of Codonopsis pilosula and the optimum amount of fertilization,a field experiment about eight formulas of N,P,K and the optimum amount of fertilization for the best formula was conducted at Zhang county,Gansu in 2008and 2009,root morphological character during medicine period as well as yield were determined,quality,nutrient utilization and economic benefits of Codonopsis pilosula were analyzed.The result showed that no significant different was found in ...