The Latest Technical Methods and Tutorial for Field Management of Corydalis yanhusuo

Corydalis yanhusuo, also known as Yanhu, Xuanhusuo and Yuanhusuo, is a perennial herb of the genus Corydalis. Its tubers can be used as medicine and it is a well-known traditional Chinese medicine, often used for promoting the flow of qi to relieve pain, activating blood circulation to dissipate blood stasis, and treating traumatic injuries. In the production process, field management is extremely important. Let's take a look at the field management techniques for Corydalis yanhusuo.

1. Loosening the soil and weeding

The root system of Corydalis yanhusuo is relatively shallow and generally grows along the surface soil, so intertillage is not suitable, lest the rhizomes be exposed on the surface soil. However, in order to promote the growth of its rhizomes, loosening the soil and weeding is unavoidable. Around the Start of Winter, when the rhizomes begin to grow, a scraper can be used to gently loosen the surface soil, taking care with the depth so as not to damage the rhizomes. After the Start of Spring, loosening the soil should not be carried out, and weeds should be removed in time so that there are no weeds in the field.

2. Drainage and irrigation

After planting, it is the season for the plants to develop roots. In case of dry weather, water in time to keep the soil moist and promote early root development. Around Qingming Festival is the period of rapid expansion of the underground rhizomes, when sufficient water is needed. If the soil is too dry, it will affect the yield. Therefore, irrigate in time during drought, and drain in time during the rainy season to reduce the probability of disease and the possibility of root rot. In the north, before overwintering, irrigate with freezing water to facilitate overwintering.

3. Fertilization

The growth period of Corydalis yanhusuo is relatively short, and it can generally be harvested in March to April, so sufficient base fertilizer must be applied before planting. In winter, when most of the barnyard manure spread on the surface has rotted, rake the unrotted residue into the furrows, and apply 500-1000 kg of human manure per mu. When the plants sprout in spring, apply the first topdressing, generally 250-500 kg of human urine and manure per mu, diluted with water before watering. At flowering, apply 1000 kg of human urine and manure per mu and 10 kg of ammonium sulfate, also diluted with water.

4. Pest and disease control

In hot and rainy seasons, downy mildew occurs. This disease has a short incubation period and spreads quickly once it occurs, and it is the main disease affecting the yield and quality of Corydalis yanhusuo. Applying more phosphorus and potassium fertilizer can enhance disease resistance. When the disease occurs, spray phosethyl-Al for control, once every 10-15 days, for 3-4 consecutive times. The pests are mainly underground pests such as cutworms and white thread worms, which can be caught manually or controlled by drenching the roots with chemicals.

The above is an introduction to the field management techniques for Corydalis yanhusuo. We hope it can help you. To learn more related knowledge, please stay tuned to us.