Planting techniques of Radix scrophulariae

Radix scrophulariae, also known as Radix Scutellariae, black ginseng, Zhejiang Scrophularia, etc., is a Chinese specialty, which is a tall herb of Scrophulariaceae, mainly produced in Zhejiang, Sichuan, Hubei, Guizhou, Hunan, Jiangxi and other places. Its medicinal value is very high. It has the effects of clearing away heat and cooling blood, nourishing yin and reducing fire, detoxification and dispersing knots. Let's take a look at the planting technology of Scrophulariae.

Growth habits of Radix scrophulariae

Radix scrophulariae has strong adaptability, likes warm and humid climate, can be planted in places that are cold-resistant, drought-resistant and well drained, and likes fertile humus soil and sandy soil. Clay and low-lying land are not suitable for planting. Continuous cropping is avoided. Wild Radix scrophulariae is mainly distributed in Yunnan, Sichuan, Guizhou, Hubei, Guangxi, Anhui and other places, while domestic species are mainly distributed in Zhejiang, Sichuan, Hunan, Hubei, Guizhou, Hebei, Shaanxi, Shandong, Henan, Shanxi and other places.

Propagation techniques of Radix scrophulariae

1. Land selection and preparation: deep sandy loam is selected and planted on the sunny slopes of barren hills. it is better to plant legumes and Gramineae in the previous crop. The root of Radix scrophulariae is very deep in the soil and has a strong ability to absorb fertilizer, so it needs deep ploughing, applying sufficient basic fertilizer, 75000 kg / ha, and then making a high ridge with a height of 25 cm, a width of 45 cm at the bottom and a width of about 30 cm at the top. The border is about 120cm wide, and the length depends on the topography and seed quantity.

2. Propagation methods: seed buds are generally used in the production of Radix scrophulariae, and disease-free, robust and white buds are selected during harvest. Winter seeds are used in the south and planted in mid-and late-December to the first and middle of January of the following year. According to the row spacing of 40 cm to 50 cm, plant spacing of 34 cm to 40 cm, hole depth of 8 cm to 10 cm, one seed bud per hole, bud upward. It is mainly planted in spring in the north, and it is planted from late February to early April.

Field Management of Radix scrophulariae

1. Ploughing and weeding: when Radix scrophulariae emerges, the grass is pulled out, and it is not easy to loosen the soil too deep when weeding, so as to avoid harming the root block. After June, the plant has grown up, there is no need for pine, if there is grass, pull up.

2. Timely topdressing: before ridge closure, Radix scrophulariae was mainly applied with phosphorus and potassium fertilizer twice, and some barnyard manure or compost was applied, which was applied in small holes or ditches next to the plant, covered with soil, and cultivated at the root.

3. Reasonable seedlings: in the second year after planting, many seedlings will grow from the roots, so that the newspaper will be expanded, the yield will be increased, and the excess strains will be removed in time, leaving only 2-3.

4. Timely topping: Scrophularia will bolt when it grows to a certain extent. If it is used as a commercial harvest, it will not be used as a seed. When the flower bolts are extracted, the nutrients will be concentrated in the root of the tuber.

5. Watering and drainage: Radix scrophulariae is more resistant to drought and not resistant to waterlogging. When the drought is particularly serious, water is properly watered to make the soil moist, but it is not easy to flood, and rainy water should be drained in time during the rainy season.

Disease and insect control of Radix scrophulariae

1. Spot blight

[harm] the rainy season is more serious, which occurs generally in the north and south, and purple-brown spots appear on the leaves at the initial stage of the disease. , the center is slightly sunken, and the posterior lesion expands into a polygonal, round or irregular shape. The large disease spot is grayish brown, separated by veins into a network, the edge is surrounded by a purple-brown angular protruding wide ring, and there are many small black spots on the spot. The heavy leaves withered.

[prevention and control] after ① harvest, clear the garden and eliminate the diseased and residual plants. ② strengthens field management and pays attention to drainage and ventilation. Before and at the initial stage of the onset of ③, the patients were sprayed with 100 Bordeaux solution or 65% Dysen zinc 500x solution, once every 7 to 10 days, several times in succession.

2. White silk disease

[harm] damage to roots and rhizomes, the disease is easy to get in the south, from June to September, Rain Water is often serious. The root rot, the diseased root and rhizosphere soil are covered with white silky hyphae, and bear light yellow to tea-brown rapeseed sclerotia. Hyphae and small sclerotia can spread to the main stem. The diseased plant wilted and withered rapidly.

[control] ① and Gramineae crop rotation, avoid continuous cropping. ② strengthens field management and pays attention to drainage, ventilation and light transmission. High-border planting should be used in rainy areas. ③ pulled out the diseased plant in time, removed the soil of the diseased point, and removed the lime to seal the diseased point. Before planting ④, use 50% antiseptic 1000-fold vacuole for 5 minutes and then dry and plant.

3. Ground tiger

[harm] harms the roots and buds of Radix scrophulariae.

[control] 100 grams of 2% methomyl EC can be used, diluted with 1 kilogram of water, then sprayed on 100 kilograms of fresh grass or chopped vegetables (about 16 centimeters long), mixed into poison bait, stacked in the field in the evening, stacked into a small pile with a diameter of 30 centimeters and a height of 15 centimeters at a certain distance, and 25 kilograms of poison bait per mu to trap tigers.