Causes and Control methods of early bolting of Angelica sinensis

The phenomenon of early bolting of Angelica sinensis often occurs in the process of planting Angelica sinensis. Angelica sinensis with early flowering and bolting is lack of especially and can not be used medicinally, which causes huge economic losses to farmers. So what is the reason for early bolting of Angelica sinensis? How to prevent it? Let's take a look at the detailed introduction.

First, the cause of bolting

1. Genetic factors: bolting Angelica sinensis is used when planting, the bolting rate of seedlings cultivated by normal remaining plants or overripe plants and aged plants is higher, about 80-90%.

2. Ecological factors: when planting on the sunny slope with low altitude and high temperature, it is easy to cause early bolting in drought. In addition, the bolting rate of seedlings stored in shade is about half lower than that of Yang Di. When the shading is about 50% after transplanting, the bolting rate will decrease by 60%, and the bolting rate will reach its peak when the sunlight lasts for more than 14 hours.

3. Nutritional factors: early bolting of Angelica sinensis is also closely related to the size and quality of its seedlings. At the same seedling age, the heavier the seedlings are, not only the bolting process will be accelerated, but also the earlier the bolting time will be, the bolting rate will increase obviously. In addition, early bolting was also related to nitrogen content and sugar content of seedlings.

4. Improper cultivation: the earlier the sowing time is, the higher the early bolting rate is, the higher the sowing density is, the early bolting phenomenon will also appear, and the bolting rate will easily occur when transplanting early, and the late bolting rate decreases. The bolting rate of Angelica sinensis was significantly increased with the application of too much flower fertilizer, among which diammonium phosphate was the highest, and the effect of phosphorus fertilizer on the bolting rate of Angelica sinensis was obvious. The bolting rate of Angelica sinensis was significantly increased by applying too much nitrogen and phosphorus fertilizer. When it is in the vegetative growth period and high temperature and dry climate, its bolting rate will also increase significantly.

II. Prevention and control methods

When planting, we should select improved varieties, choose seeds that are not easy to bolting, sow seeds in time, control large seedlings and old seedlings, reduce the rate of early bolting and flowering, postpone sowing time, control seedling age within 110 days, and seedling weight less than 40 grams. In the later stage of seedlings, proper application of nitrogen fertilizer should be applied to increase the nitrogen content of the plant, reduce the sugar content of the plant, and inhibit bolting and flowering. In addition, it is necessary to control the density when sowing, generally using seeds of 3-5 kg per mu, not too much, lest the density is too high and bolting easily.

The above is the introduction of the causes and prevention methods of bolting in the early stage of Angelica sinensis. I hope it can help you. If you want to know more about it, please follow us.