Detailed Explanation of Field Management Techniques for Corydalis yanhusuo

Corydalis yanhusuo, also known as Yanhu, Xuanhusuo, and Yuanhusuo, is a perennial herbaceous plant of the genus Corydalis. Its tubers can be used as medicine and it is a well-known traditional Chinese medicine, commonly used for promoting qi and relieving pain, activating blood circulation and dispersing 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 below.

1. Loosening soil and weeding

The root system of Corydalis yanhusuo is relatively shallow, generally growing along the surface soil, so intertillage is not suitable, to avoid exposing the rhizomes above the surface soil. However, in order to promote rhizome growth, loosening soil and weeding are unavoidable. Around the Start of Winter, when the rhizomes begin to grow, a scraper can be used to gently loosen the surface soil, paying attention to the depth to avoid damaging the rhizomes. After the Start of Spring, soil loosening should not be carried out, and weeds should be removed in time, ensuring the field is free of weeds.

2. Drainage and irrigation

After planting, it is the season for the plants to develop roots. If drought weather occurs, water should be applied in time to keep the soil moist and promote early root development. Around Qingming Festival, the underground rhizomes enter a period of rapid expansion, and at this time sufficient water is needed. If the soil is too dry, it will affect the yield. Therefore, in dry conditions, irrigation should be done in time, while in the rainy season, drainage should be done in time to reduce the probability of disease and the possibility of root rot. In the north, before overwintering, freezing water should be applied 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 spread barnyard manure 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, which should be 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

Downy mildew occurs in hot and rainy seasons. 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. Additional phosphorus and potassium fertilizer can be applied to enhance disease resistance. When the disease occurs, spray aluminum ethylphosphonate for control, once every 10-15 days, for 3-4 consecutive times. The main pests are underground pests such as cutworms and white silk worms, which can be caught manually or controlled by drenching the roots with pesticides.

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