| The changes of agronomic traits, dry matter accumulation, nutrient elements and medicinal components of Sinopodophyllum hexandrum were studied, to clarify the nutrient absorption law of Sinopodophyllum hexandrum and its relationship with the accumulation of medicinal components. Taking 3-year-old Sinopodophyllum hexandrum as the research object, the agronomic traits, dry matter accumulation, nutrient elements and four kinds of medicinal components in roots were determined at different growth stages. The results showed that:（1）The agronomic traits of Sinopodophyllum hexandrum showed an increasing trend with the growth period, and the dry matter accumulation showed a ' slow-fast-slow ' rule with the growth period.（2）The demand for nitrogen and potassium fertilizer was large during the annual growth period, and the accumulation of 11 nutrient elements was in the order of nitrogen > potassium > calcium > phosphorus > magnesium > iron > sulfur > manganese > boron > zinc > copper; the accumulation of nitrogen, phosphorus and potassium in the aboveground and underground parts reached a high level at 150 days after emergence.（3）The total variation of podophyllotoxin, quercetin and kaempferol accumulation in roots was basically the same, which increased firstly, then tended to be gentle and then increased, the accumulation of 4'-demethylpodophyllotoxin increased firstly and then stabilized.（4）Nitrogen, phosphorus, potassium and boron can promote the accumulation of effective components, while calcium and iron may inhibit the accumulation of effective components. The uptake activities of pectin calcium, the vigorous growth period ( 90 ~ 150 d ) of Sinopodophyllum hexandrum is the most critical period for dry matter accumulation and nutrient accumulation, the order of absorbing macroelement is nitrogen, potassium and phosphorus, and boron is also a key traceelement affecting quality. It is suggested that macroelement should be applied in the vigorous growth period, and boron should be applied in the leaf-increasing period ( 30 ~ 90 d ); the content of medicinal components reached the maximum during the withering dormancy period, and the best harvest period was from late September to mid-October. |