Seed Angelica dahurica can reduce bolting and increase yield.

In production, there are often some Angelica dahurica plants bolting and blooming in advance in the second year, generally 10%, 30%, and more than 50%, seriously affecting the yield and quality. There are many factors leading to bolting and flowering of Angelica dahurica. according to the characteristics of early bolting of Angelica dahurica, measures such as controlling sowing date, fertilizer and water management and seed selection are adopted to control seedling growth. so that the seedlings will not grow too big or too small before overwintering, so as to reduce the bolting rate of Angelica dahurica.

1. Reasonable pruning and breeding: according to the effect of Angelica dahurica seeds on bolting, Angelica dahurica da

2. Sowing at the right time: the sowing time sooner or later affects the growth of seedlings. According to the actual situation of different regions, the sowing period suitable for local climatic conditions and soil conditions is selected.

3. Control water and fertilizer: strictly control the supply of fertilizer and water before spring, with little or no application, and enter the peak period of vegetative growth after the seedlings are fixed in the first and middle of April. In order to meet the needs of rapid growth, fertilizer is needed at this time. Different kinds and methods of fertilization have great influence on the early bolting rate of Angelica dahurica. If potassium fertilizer is applied alone, the early bolting rate of Angelica dahurica is low, and potassium can control the early bolting of Angelica dahuricae dahurica dahur