How do you plant yanhusuo? Pollution-free planting techniques of Rhizoma Corydalis

How to grow Rhizoma Corydalis in traditional Chinese medicine? Corydalis yanhusuo, also known as Yuanhu and Xuanhu, belongs to the genus Corydalis of Papaveraceae. Rhizoma Corydalis is a common traditional Chinese medicine for regulating qi and relieving pain. it is used as a tuber for medicine and has the functions of promoting blood circulation and relieving fatigue. Used for the treatment of heartache and waist pain, fall injury, irregular menstruation, postpartum abdominal pain and so on. Let's take a look at the pollution-free planting technology of Rhizoma Corydalis.

1. Growth habits

Rhizoma Corydalis is a perennial herb, like warm climate and sunny, humid environment. Avoid drought. The planting plot should be loose, fertile and well-drained neutral or slightly acidic sandy loam. The clayey soil and low-lying waterlogged land are not suitable for planting.

2. Land selection and preparation

The sandy loam with sunny leeward, loose soil and rich humus should be selected. After selecting the land, deep turning the soil 30Cm, combined with soil preparation, applying human rotten stable fertilizer 2000kg and cake fertilizer 200kg per mu (667m2, the same below), turning it into the soil as base fertilizer, leveling and raking fine, making a high border with a width of 1.3m, a wide 40cm, and opening a drainage ditch around.

3. Planting

When harvesting Corydalis yanhusuo, the tubers of medium size, neat, flat globular shape, about 1.5cm in transverse diameter, yellow and light in color, free from diseases and insect pests and scars were selected as seed stems and planted in late September. When planting, on the finished border surface, according to the specifications of row spacing 20cm, sowing width 10cm and ditch depth 8? 10cm, the seed stem bud head was arranged upward and two rows staggered in the ditch according to the plant spacing 7cm, and then covered with fertile fine soil until the ditch was full.

4. Field management

Rhizoma Corydalis is a shallow root crop, so it is not suitable for intercropping. When the seedling height 3cm, per mu topdressing mature human and animal manure water 1500kg, in time to pull grass. In late January, apply a layer of cake fertilizer on the border, apply 50kg per mu, then cover a layer of rotten stable fertilizer, apply 2000kg per mu, and cover fine soil after fertilization. In case of rain, timely ditch drainage, drought irrigation. In addition to planting land, when buds appear in Corydalis, they should be removed in time to concentrate nutrients on root growth and increase yield.

5. Disease and pest control

5.1 downy mildew

The leaf disease first, the initial brown irregular disease spot, when the humidity is high, the back of the leaf produces a white mildew layer, the diseased stem and leaf, quickly turn brown and die, and the plant dies. The prevention and control methods are as follows: one is to carry out flood-drought rotation, the second is reasonable close planting to improve ventilation and light transmission, and the third is to spray with 500-fold liquid spray of 25% Trichoderma wettable powder, once every 10 days, three times in succession.

5.2 fennel nuclear disease

First, yellowish-brown or dark brown prismatic spots were produced at the base of the stem near the topsoil. When the humidity was high, the stem base was soft rotten and the plant lodged. The leaves were damaged and became bluish brown at first and then became bluish brown. When the disease is serious, the soil is covered with white cotton-like hyphae and black rat fecal sclerotia of different sizes. Prevention and control methods: first, implement flood and drought rotation; second, remove stagnant water in the field in time after rain to reduce field humidity; third, find diseased plants, eradicate them in time, and spread the disease area with lime powder to control the spread; fourth, in the early stage of the disease, use 65% Dysen zinc wettable powder 500 times liquid spray control.

5.3 Rust

At the initial stage of the diseased leaves, there were round or irregular green disease spots with slight depression. The disease spot on the back of the leaf is slightly raised, with a sticky yellow bulge, which emits a large amount of yellow powder after rupture. The control methods are as follows: one is to reduce the humidity in the field, and the other is to spray 9.7% diphacinone sodium 300 times in time at the initial stage of the disease.

6. Harvesting and processing

The local upper stems and leaves withered and harvested. When harvesting and digging, first shallow ploughing, ploughing the soil while harvesting, and then turning deeply once after harvest, pick up the tubers and transport them back to the room to spread out to dry. When processing, wash the soil, load it into baskets according to size, place it in running water, scrub the skin with your hands, wash and drain. Then, when the tuber is boiled in boiling water until the cross section of the tuber is yellow, take it out and spread it on the bamboo mat to dry. After 4-5 days of sun exposure, "sweat" is collected indoors, so that the internal water exudates, and then the sun is fully dry, that is, the commodity. The quality of a large, full, hard, yellow cross section is better.