Why does Saposhnikovia divaricata bolt? Detailed explanation of causes and control methods

Saposhnikovia divaricata is a traditional Chinese medicinal herb, mainly used to treat wind-cold colds and skin diseases. As its market demand has expanded, large-scale harvesting of wild resources has led to a gradual shortage of wild resources, and artificial cultivation has emerged. However, bolting occurs during cultivation, affecting the yield and quality of Saposhnikovia divaricata. Now let's take a look at the causes of bolting in Saposhnikovia divaricata and the control methods.

I. Causes of bolting

There are mainly two causes of bolting in Saposhnikovia divaricata. One cause is nutrition: when the flower buds of Saposhnikovia divaricata differentiate, if fertilizer and water are sufficient and the soil is loose, plant growth will accelerate, flower bud differentiation will occur earlier, and premature bolting will appear. The second is caused by phytochrome, which controls plant flowering. During artificial cultivation, because Saposhnikovia divaricata has no weed shading, it receives higher light intensity than wild resources, so phytochrome is more active, which will cause Saposhnikovia divaricata to bolt and flower.

II. Control methods

1. During the seedling stage, apply base fertilizer appropriately. During the growth process, apply less chemical fertilizer or no chemical fertilizer, so as to avoid excessive plant nutrition causing early flower bud differentiation and causing early bolting.

2. When transplanting, plant at a reasonable density and pay attention to planting density. Generally, the seedling field only needs to maintain 300,000 seedlings per mu, while field transplanting only needs to maintain 30,000 plants. This allows the plants to shade each other and reduces light intensity, which can prevent rapid growth of Saposhnikovia divaricata and inhibit its flower bud differentiation.

3. Control watering to force the root system of Saposhnikovia divaricata to grow downward and increase root length, so as to avoid excessive water causing vigorous growth and bolting. Generally, when transplanting, only water 1-2 times for seedling recovery; after survival, water as little as possible or not at all, so as to avoid bolting caused by vigorous growth.

4. Once bolting Saposhnikovia divaricata is found, cut off the rhizome head in time. In this way, the hormones produced by the plant for flower bud differentiation will be removed, causing it to sprout adventitious buds again, which has an excellent effect on preventing bolting in Saposhnikovia divaricata.

The above is an introduction to the causes of bolting in Saposhnikovia divaricata and the control methods. We hope it can help you. If you want to learn more related knowledge, please follow us.