What is the effect and function of Banlangen? Additional planting technology!

Radix Isatidis is a common traditional Chinese medicine, which is usually excavated in autumn and can be used as medicine after processing. The root is called Radix Isatidis and the leaf is called Daqing Leaf. So, what is the effect and function of Banlangen? Additional planting technology!

What is the efficacy and function of Radix Isatidis?

1. Anti-pathogenic microorganisms

The heat-clearing and detoxifying effect of Radix Isatidis is mainly reflected in the treatment of acute infectious diseases.

2. Anti-endotoxin

Endotoxin has a universal influence in the pathogenesis and development of acute infectious diseases. Many scholars have conducted in-depth studies on the anti-endotoxin effect of Radix Isatidis. It was found that Radix Isatidis could significantly reduce the level of serum LPO in endotoxin-induced DIC rabbits. Increase the activity of SOD and antagonize the biological effect of endotoxin.

3. Antipyretic

Fever is the main symptom of febrile disease. According to research, Radix Isatidis can reduce the increase of body temperature caused by typhoid and paratyphoid, and has a good antipyretic effect.

4. Anti-inflammation

Radix Isatidis has broad-spectrum antibacterial activity in vitro (including dysentery bacteria, salmonella bacteria, hemolytic streptococci). It is a traditional Chinese herbal medicine for antibacterial, anti-inflammatory, analgesic and antipyretic.

II. Planting techniques of Radix Isatidis

1. Land selection and preparation

Select the sandy loam with flat terrain, good drainage, deep soil layer, fertile and loose, and apply harmless farm fertilizer 2000kg and compound fertilizer (15-15-15) 50kg per mu (667m2, the same below), mix evenly, spread the ground evenly, turn 35cm with the cultivated land deeply, and then flatten and rake fine.

2. Sowing seeds

In the middle and last ten days of May, when the surface temperature is stable at 10 ~ 12 °C, strip sowing or sowing, strip sowing is better, easy to manage, and the sowing amount per mu is 2kg. Open the 2~3cm shallow ditch according to the row spacing 20~25cm, sow the seeds into the ditch, cover the soil with 1~1.5cm, slightly suppress, water in time after sowing, keep the soil moist, and the seedlings can emerge in 7 to 10 days.

3. Watering

Pull a sprinkler belt every 3m (miniature sprinkler irrigation). At the seedling stage, the ground was watered gently when it was dry. After the seedling stage, it was generally watered once every 7-10 days, and watered as little as possible in the middle and later stages of growth to promote root growth.

4. Field management

(1) fixing seedlings between seedlings

When the seedling height 7cm, according to the plant distance 6~8cm and time seedling, fixed plant.

(2) weeding by ploughing

In the seedling stage, the weeding was carried out by ploughing and weeding in time, the weeding was done manually at the same time between the seedlings, the second artificial weeding was carried out at the seedling height 15cm, and then weeded every 15 days to keep the field weed-free.

(3) topdressing and watering

After interseedling, organic water soluble fertilizer 20kg or urea 5kg was applied per mu combined with watering. Watering in the morning or evening during drought should keep the soil moist at the seedling stage, while when the leaves of Radix Isatidis are about to be closed, they should be watered less, in line with the principle of no drought and no watering.

5. Pest control

Implement the plant protection policy of "prevention first, comprehensive control". Through the selection of excellent varieties, rational fertilization, watering and other cultivation measures to prevent diseases and insect pests, the comprehensive control methods of physical, agricultural, biological and chemical control are adopted to control the diseases and insect pests within the allowable range, so that the safety of the products can meet the national organic food requirements and standards.

(1) powdery mildew and gray mold

At the initial stage of the disease, the leaves changed from yellow to brown, and the leaves had no obvious disease spot symptoms. with the aggravation of the disease, gray-black mildew appeared on the leaves, and when the leaves were serious, the leaves withered. Prevention and cure method: use diphenyl ether nail ring file (ether carbendazim) + ethoxyl + foliar fertilizer (easy to help), spray once every 15 days, spray 2 times continuously for 3 times.

(2) Plutella xylostella

The larvae bite on the leaves, resulting in notches and cavities, leaving only veins in serious cases. Control methods: when the larvae were young, the larvae were sprayed with alkaloids, once every 7-10 days, for 2-3 times.

6. Harvesting and primary processing

(1) harvesting Folium Isatidis

The green leaves were harvested in the middle and last ten days of August, and the fresh leaves can be harvested 400~500kg per mu. To cut from the base of the plant off the ground 2cm, cut back to 70-80% dry, tie into a small bundle, continue to dry.

(2) harvest Radix Isatidis

Before freezing in early October, when the local upper stems and leaves withered, dig up the roots, harvest fresh roots 300~500kg per mu, remove the soil and stems and leaves, wash them, and when they are 70 or 80% dry, tie them into small bundles and dry them all.