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[Study on Dry Matter Accumulation and Nutrient Uptake of Shiyao Angelica sinensis].

OBJECTIVE
To study the dry matter accumulation and nutrient uptake of Shiyao Angelica sinensis, in order to provide theoretical basis for reasonable fertilization.


METHODS
The aerial part(stems and leaves) and root were collected in different growth periods, and the fresh weight, dry weight and contents of nitrogen, phosphorus and potassium were measured.


RESULTS
The dry matter accumulation and nutrient uptake were well fitted a Logistic equation with the increase of the number of days after sowing. In the early stage of Shiyao Angelica sinensis growth, the dry matter accumulation and nutrient uptake were very slow. Beginning in late July, the dry matter accumulation and nutrient uptake of stems and leaves sped up. Starting from the occurrence peak in August, the roots of nutrient uptake sped up. In late September, the dry matter accumulation of root reached a peak. In early October, the dry matter accumulation and nutrient uptake slowed down significantly. The middle of October was the harvest time.


CONCLUSION
Some phosphorus should be applied as base fertilizer in the plantation of Shiyao Angelica sinensis, and nitrogen should be applied as top fertilizer in different growth periods.