Detailed Explanation of Field Management Methods and Technical Key Points for Angelica sinensis

    (1) Checking seedlings and filling gaps Angelica sinensis generally emerges 20—30 days after transplanting. Once the seedlings are uniform, check the seedlings and fill gaps promptly. 

    (2) Cultivation and weeding After the seedlings emerge uniformly, carry out cultivation and weeding three times for Angelica sinensis. The first weeding is done when the seedlings are 5 cm tall after uniform emergence, with shallow cultivation and shallow hoeing; the second weeding is done when the seedlings are 10—15 cm tall, with appropriately deeper hoeing; the third weeding is done when the seedlings are 25—30 cm tall, combined with cultivation and weeding, and hilling up the soil. 

    (3) Topdressing During the seedling stage of Angelica sinensis, do not apply too much nitrogen fertilizer to avoid excessive vegetative growth. In the middle and late stages, in combination with cultivation and weeding, apply 30--50 kg of compound fertilizer per mu. Topdressing is required twice throughout the entire growth period.

      Apply topdressing once when the seedlings are 10-15 cm tall, with a total active ingredient amount of 6 kg/666.7m2, N:P:K at 1:1:1; apply topdressing once when the seedlings are 25-30 cm tall, with a total active ingredient amount of 8 kg/666.7m2, N:P:K at 1:1:2. Do not apply inorganic fertilizer within 30 d before harvest.

    (4) Removing flower bolts If, due to improper control during cultivation, some plants bolt prematurely, they should be cut off and removed cleanly as early as possible; otherwise, the quality of the medicinal material will be affected. 

    (5) Irrigation and drainageAngelica sinensisIn the early growth stage, water less. When the soil is dry, water an appropriate amount, preferably keeping the soil moist. Avoid flood irrigation. In the later stage, the field must not accumulate water. During the rainy season, drain accumulated water promptly to prevent root rot.