What to Do When Saposhnikovia divaricata Bolts? Cause Analysis and Control Methods
Saposhnikovia divaricata is a traditional Chinese medicinal herb, mainly used to treat wind-cold colds and skin diseases. As market demand for it has expanded, large-scale harvesting of wild resources has gradually led to a shortage of wild resources, and artificial cultivation has risen. However, bolting can occur during cultivation, affecting the yield and quality of Saposhnikovia divaricata. Below, follow the editor to take a look at the causes of bolting in Saposhnikovia divaricata and the control methods.
I. Causes of Bolting
There are two main 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, the plant will grow faster, flower bud differentiation will occur earlier, and premature bolting will appear. The second is caused by phytochrome, which controls the flowering of plants. 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 an appropriate amount of base fertilizer. During the growth process, apply little or no chemical fertilizer, so as to avoid excessive plant nutrition causing early flower bud differentiation and triggering early bolting.
2. When transplanting, plant at a reasonable density and pay attention to the planting density. Generally, the seedling bed 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 sufficient water causing vigorous growth and bolting. Generally, when transplanting, only 1-2 times of seedling-establishing water are needed; after survival, water as little as possible or not at all, so as to avoid vigorous growth causing bolting.
4. Once bolting Saposhnikovia divaricata is found, cut off the reed 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. This has an excellent effect on preventing and controlling 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 stay tuned to us.