Abstract:Through field experiments and sampling analysis, the dry matter accumulation and nitrogen, phosphorus,and potassium uptake of different growth stages of wild Chrysanthemum indicum plants were studied to explore the characteristics of dry matter accumulation and nitrogen, phosphorus, potassium uptake and distribution in wild C. indicum. The results showed that:(1) The dry matter accumulation of C. indicum increased with the growth process,and showed a trend of "slow-fast-slow". At the flowering stage, the dry matter accumulation of flowers increased by17.78%. The proportion of dry matter accumulation of each part in the total dry matter of the whole plant was stem >leaf > flower > root.(2) In the vegetative growth stage, the absorption rate of N and P was higher, but the absorption rate of K was lower. After flowering, the absorption rate of N and P slowed down, and the absorption rate and accumulation rate of K increased.(3) In the whole growth period, the accumulation rule of N, P and K in the vegetative parts(roots, stems and leaves) of C. indicum was the same, which increased first and then decreased. The peak appeared at the end of branching period and budding period(from September to October). The accumulation of N, P and K in flower/bud increased continuously. The period from branching to budding is the key period for the growth and development of C. indicum, and water and fertilizer management should be emphasized during this period to promote bud formation at the top of the plant and dry matter accumulation.