Corydalis yanhusuo Planting Methods and Cultivation Techniques
Corydalis yanhusuo, commonly known as yuanhu, is a perennial plant in the Papaveraceae family. Its main medicinal part is its tuber, which is rich in alkaloids and is often used for pain relief, promoting blood circulation and removing blood stasis, and treating traumatic injuries. In China, it is mainly distributed in Anhui, Jiangsu, Hubei and Zhejiang, and is also grown in small amounts in many other regions, such as Shaanxi and Gansu. So how do you grow Corydalis yanhusuo? Let's take a look at its planting methods below.
1. Land preparation
The growing environment for Corydalis yanhusuo is generally relatively warm and humid. The planting site should be sandy soil with good drainage, strong soil permeability and rich humus content. Land preparation is generally done in autumn, deep plowing the soil at least three times and applying plenty of barnyard manure or compost. Break up the soil clods finely, level the ground, and open furrows to make beds. The bed width is about 1.3 m, the bed height is about 30 cm, and the furrow width is 30 cm with a depth of about 20 cm.
2. Sowing
The best planting time for Corydalis yanhusuo is from the end of September to early October each year. Sowing is usually done by drilling. Open shallow furrows with a row spacing of about 10 cm and a furrow depth of about 5 cm, then place the seed tubers of Corydalis yanhusuo at intervals of 6 to 7 cm. After placing them, scatter fertilizer, then cover with a layer of fine soil to bury the seeds. About 900 kg of seed tubers are generally needed per mu.
3. Management
Weeding for Corydalis yanhusuo differs somewhat from weeding for other medicinal herbs. It cannot use intertillage weeding and can only be weeded by hand. Once weeds grow, they must be pulled at any time to avoid nutrient loss. In February, carry out the first fertilization, mainly with manure and urine water or ammonium bicarbonate. When fertilizing, we need to dilute the fertilizer concentration to avoid damaging the growth of Corydalis yanhusuo. The second is in April, which is the post-flowering fertilizer for Corydalis yanhusuo. In addition to manure and urine water, it also needs to be applied together with chemical fertilizers such as potassium fertilizer and phosphorus fertilizer. During the growing period of Corydalis yanhusuo, water management is very important, so we must ensure soil moisture, water reasonably, and drain promptly.
4. Pest and disease control
The most common pests and diseases of Corydalis yanhusuo include downy mildew, sclerotinia rot, rust, and cutworms. Downy mildew generally occurs during the growing period of Corydalis yanhusuo, around April. We can use Bordeaux mixture for control, or use chlorothalonil wettable powder for control. Sclerotinia rot generally begins to appear gradually from March, with April being the peak period of the disease. Thiophanate-methyl wettable powder or carbendazim wettable powder can be used for control. Rust mostly occurs in the middle growth stage of carbendazim wettable powder and mainly damages the stems and leaves of Corydalis yanhusuo. Bordeaux mixture can be used for control. For underground pests such as cutworms, we can apply benzene hexachloride powder during land preparation for prevention.
The above are the planting methods for Corydalis yanhusuo. In the process of growing Corydalis yanhusuo, there are also many points we need to pay attention to, which can improve the yield and quality of Corydalis yanhusuo to a certain extent. That's all for today's sharing. If you want to learn more about Corydalis yanhusuo, remember to leave a message for us or follow us.