Fangfeng cultivation technique

Fangfeng is a kind of Chinese herbal medicine, alias Tongyun, Huiyun, Huicao, Baizhi, hundred species, etc., is a perennial herb, has the effect of dispelling wind and relieving surface, winning dampness and relieving pain, and antispasmodic effect. So, what are the cultivation techniques of Fangfeng?

1. Land selection and preparation

Fangfeng is a deep-rooted plant with a main root length of up to 50 cents and 60 centimeters, which should be planted in sandy loam with high dryness and good drainage. Fangfeng is very short, bifurcated and poor in quality. Fangfeng is a perennial plant, which needs to be fully fertilized when preparing the soil. Each mu of barnyard manure 3000mur4000 kg and calcium superphosphate 15-20kg are used for deep ploughing and fine rake. The north is made into a flat bed 1.3mi 1.7 meters wide, while the rainy area in the south is made into a high border with a width of 1.3 meters and a ditch depth of 25 centimeters.

2. Sowing seeds

Seeds can be sown in both spring and autumn. Spring sowing in the Yangtze River Basin from late March to mid-April, North China in the first and middle April, autumn sowing in the Yangtze River Basin from September to October, North China sowing before ground freezing and emergence in the following spring. Spring sowing requires soaking the seeds in warm water for 1 day to fully absorb water to facilitate germination. Sow the seeds evenly in the ditch, cover the soil and cover flat, slightly suppress, cover the grass and water, keep the soil moist, and the seedlings can emerge 20-25 days after sowing. Use 2 kg of seeds per mu.

3. Field management

① seedlings: when the seedling height is 5 cm, the plant spacing is 7 cm; when the seedling height is 10 li 13 cm, the plant spacing is 13 cm.

② weeding: weeding should be carried out many times before June to keep the field clean. When the plant is closed, remove the old leaves first, then cultivate the soil to prevent lodging; when it comes to winter, combine with cleaning the site, and cultivate the soil again to facilitate the root to survive the winter.

③ topdressing: in the first ten days of June or the last ten days of August each year, topdressing should be done once respectively, and ditches were opened with human feces and urine, calcium superphosphate or compost.

④ bolting: plants more than 2 years old should be bolted in time, except for those used to keep seeds.

⑤ irrigation and drainage: the soil should be kept moist during the period from sowing or planting to before emergence. Strong wind and drought resistance, do not need watering, rainy season pay attention to timely drainage, in order to prevent stagnant water rotting roots.

4. Pest control

Powdery mildew: damage to leaves in summer and autumn. Prevention and treatment methods: ① application of phosphorus and potassium fertilizer, pay attention to ventilation and light transmission; when the onset of ② with 50% topiramine 800-1000 times liquid spray prevention and treatment.

Yellow-winged fennel borer: occurs when the bud is in bloom, causing damage to the bud and fruit. Control method: spray 90% trichlorfon 800x liquid or BT emulsion 300x solution in the morning or evening.

Yellow Phoenix butterfly: the harm begins in May, and the larvae bite on leaves and buds. Control method: ① artificial killing; ② sprays 90% trichlorfon 800 times solution or 80% dichlorvos EC 1000 times solution at infancy.

In the harvest, we should pay attention to the root of Fangfeng deeper, brittle and easy to break, harvest should be from one end of the ditch to open a deep ditch, mining in sequence. Remove the residual stems, leaves and soil, remove the beard hair when the sun is semi-dry, grade according to the thickness of the root, tie it into a small handle of 0.25 kg, and dry it all.