Planting techniques of Angelica dahurica

Angelica dahurica alias qi dahurica, sichuan dahurica dahurica, hang dahurica dahurica, such as for umbelliferae when belonging to plants. Angelica dahurica likes mild and humid climate and sunny environment, poor growth in shady environment, Angelica dahurica main roots deep, soil requirements for deep, loose, fertile, good drainage sand folder. Angelica dahurica varieties more, mainly produced in sichuan library page angelica dahurica (sichuan angelica dahurica) mainly produced in zhejiang, fujian, taiwan and other provinces hang angelica dahurica (fragrant angelica dahurica) and so on.

Angelica dahurica is a perennial herb with tall plants of 2~2.5 meters. Roots stout, conical. Stems thick, hollow, with fine longitudinal ribs. Dense pilose near inflorescence. Leaves alternate; lower leaves large, 2 - 3-pinnate, margin densely sharply double serrate, final lobes ovate to long ovate, apex acute, base decurrent, petiole base enlarged into large sheaths; upper leaf lobes gradually reduced into sheaths Compound umbel, rays 10~27; floret yellow-green; petals 5, ovate-lanceolate, apex recurved; filaments slender, extending outside corolla.

Land selection and preparation

It should be cultivated on flat land. To deep soil layer, loose fertile sandy loam is preferred. Previous crops are usually rice, corn, sorghum, cotton and so on.

After the previous crop is harvested, compost or manure 3000-5000 kg, cake fertilizer 100 kg and phosphate fertilizer 50 kg are applied per mu as base fertilizer. Tillage again, about 25-30 cm deep, smooth rake fine, do high ridge. Generally, the width of the ridge is 1.2-1.5 meters and the height is 12-20 cm. Sichuan production areas generally do not make border.

Planting Technique of Angelica dahurica

1) Growing seeds. Angelica dahurica seed reproduction, can be selected seedlings transplant and on-site seed retention, the production of more than one method, generally in the collection of Angelica dahurica when digging. Sichuan election taproot does not branch, healthy disease-free purple stem angelica dahurica for seed. Henan, Hebei selection of slender roots, reed head small, without roots, thin white skin, strong Angelica species. Cut off leaves before transplanting and plant according to row spacing of 50-70 cm. Weeding and fertilization in winter and spring. 6-7 The seeds mature one after another. When the pericarp turns yellow and green (yellow and white in Henan Province), they can be collected together with the inflorescences. They can be collected in batches, then spread in a ventilated and dry place, dried and threshed, and cleaned for later use.

2. Sowing. The sowing period is divided into autumn sowing and spring sowing, with autumn sowing as the best. Autumn sowing is carried out around white dew in Henan, between summer heat and white dew in Hebei, between white dew and autumn equinox in Sichuan, and 10 days before cold dew in Zhejiang. In higher temperature areas, autumn equinox to cold dew is suitable, sowing too early, Angelica dahurica plants grow too prosperous in the year, part of the plants bloom in advance in the second year, root lignification can not be medicinal. Sowing too late, less precipitation in winter, low temperature, difficult to germinate after sowing, affecting growth.

Spread the law. Drill sowing and hole sowing can be used. Zhejiang, Henan and Hebei are drill sowing, row spacing is 13-20-27 cm, furrows are 1-1.5 cm, and seeds are used 1-1.5 kg per mu. After sowing, smooth the surface of the bed and water it to keep the soil moist. Sichuan multi-purpose hole sowing, row spacing 30-33 cm, hole spacing 23-27 cm, hole bottom to be flat. Sowing rate per mu is 0.5-0.8 kg. After sowing, they are not covered with soil, and then apply diluted human and animal manure water, about 1000 kg per mu, and then cover them with plant ash mixed with human and animal manure water, without exposing seeds. Then press or tread lightly with planks to make the seeds close to the soil for germination. 15-20 The day can sprout.

Field management of Angelica dahurica planting

1. Thinning seedlings. After emergence, the plant height is 4-7 cm, and the seedlings can be carried out 1-2 times. 5-8 seedlings are reserved for hole sowing, and 1 seedling is reserved every 7-10 cm for drilling sowing. The seedlings are determined according to the plant spacing of 10-12 cm. Thinning seedlings, leave petiole purple or plant base flat seedlings, triangular or plum blossom shape, in order to facilitate ventilation and light transmission.

2. Soiling and weeding. Weeding should be carried out in combination with thinning seedlings. Weeding at seedling stage should be carried out by hand or shallow hoe. After that, intertillage and weeding can be carried out to make the field soil loose and free of weeds for growth.

3. Fertilization. General topdressing 3-4 times, the first and second times are carried out after thinning seedlings and intertillage. 1500-2000 kg of diluted human and livestock manure water is applied per mu each time. The third time is carried out after seedling determination, and 2000-3000 kg of human and animal manure water is applied per mu, and 3 kg of urea is added. The fourth topdressing is carried out around Qingming Festival, 2000-3000 kg of human and animal manure water is applied per mu, 150 kg of plant ash is scattered, and soil is cultivated after application. The first time in Zhejiang was after thinning in March, the second time after weeding in April, and the third time before summer. The winter season is usually winter. Fertilization should pay attention to the year should be applied less, in case of excessive growth, early mossy open. The second year should be more, supplemented with phosphorus and potassium fertilizer, to promote the root stout.

4. Drainage and irrigation. Angelica dahurica after sowing soil drought, should be timely irrigation, keep the soil moist, in order to facilitate emergence. During the growth period, in case of dry weather, water should be timely watered to ensure the growth needs of plants. When there is too much rain or water in the field, drainage should be timely to prevent diseases or rotten roots.

Prevention and Control of Plant Diseases and Pests in Angelica dahurica

1. Disease

1. Spot blight. Also known as white spot disease, leaf spot disease, for fungi in a semi-known fungi. Damage to leaves. The spots were small at the beginning, dark green at the beginning, gray after expansion, and when they were serious, the spots merged into large polygonal spots. At the later stage, small black spots (i.e. conidia of pathogenic bacteria) were densely grown on the diseased spots of diseased leaves, and the leaves were partially or completely dead. The disease usually occurs in May until harvest. Too much nitrogen fertilizer, too dense plants, but also easy to disease. Control methods. Healthy and disease-free plants are selected and reserved for seed; after the angelica dahurica is harvested, diseased plants and diseased roots in residual soil are removed and burned intensively. At the beginning of the disease, the diseased leaves were removed and the Bordeaux mixture of 1∶1∶100 was sprayed 1-2 times.

2. Purple stripe disease. For fungi in a pathogen, common in the taproot purple hyphae bundle wrapped irrigation, causing root epidermis rot. In poor drainage or wet low-lying land, the disease is serious. Control methods. Make high bed to facilitate drainage; use 70% pentachloronitrobenzene powder, add 20kg plant ash per mu, mix well and spread it into the soil, and carry out repeated soil preparation; also use 70% dixon wettable powder, 2kg per mu, add 2000kg water to pour on the bed surface, and prepare and sow after the soil is dry.

3. Rhizoctonia solani. It is a semi-known fungus in fungi, which occurs mostly in early spring and rainy, heavy soil viscosity and poor air permeability. At the early stage of disease, yellow brown spots appeared at the base of seedlings, and then the base showed brown ring shrinkage depression until the plants died. Control methods. Select sandy loam for planting, remove accumulated water in time; at the initial stage of disease, pour 5% lime water once every 7 days for 3-4 consecutive times, or sprinkle 1:25 pentachloronitrobenzene fine soil around the diseased plant.

④ Black spot disease. Black spots appear on autumn leaves, control methods. Remove the diseased leaves or spray 1∶1∶120 Bordeaux mixture 1-2 times.

2. Insect pests

Yellow wing fennel moth, yellow butterfly, aphid, red spider, damage leaves. Control methods. 90% crystalline trichlorfon 1 000 times or 40% dimethoate EC 2 000 times.

A black mouth. Damage to roots. Control methods. The soil around the roots of plants was irrigated with 1000 times solution of 25% ammonium phoxim emulsifiable concentrate.

2. Carnivorous insects. Biting seeds often leaves seeds unharvested. Control methods. Spray 90% crystalline trichlorfon 1000 times.

3. Ground tiger. Damage to young stems. Control methods. To kill artificially or trap with poison bait.