High-yield cultivation techniques of Schizonepeta tenuifolia

Schizonepeta tenuifolia, alias line mustard, Artemisia annua, Schizonepeta tenuifolia and so on. With the whole grass for medicinal use, it has the effect of relieving the surface, dispelling wind, penetrating rash and stopping bleeding. It mainly treats cold, headache, sore throat, impermeable measles, urticaria, skin pruritus and so on. Stir-fry charcoal to treat hematochezia and metrorrhagia. It mainly produces Jiangsu, Zhejiang, Jiangxi, Anhui, Hebei, Hunan, Hubei and other provinces.

The morphological characteristics are annual herbs of Labiatae, with a height of 60cm and 100cm, with strong aroma. Stem erect, square stem, base slightly purplish, upper branched, whole plant pubescent. Leaves opposite; leaf blade pinnately parted, lobes 3-5, both surfaces pilose, abaxially sunken glandular spots, leaf veins inconspicuous. Flowers are verticillate, mostly concentrated at the end of branches, forming spikes; flowers small, lavender; calyx campanulate, apex 5-toothed; Corolla 2-lipped, upper lip 2-lobed, lower lip 3-lobed; stamens 4, 2 strong; ovary 4-lobed. Nutlets 4, ovate or elliptic, ca. 1 mm, surface smooth, brown. The flowering period is from June to September and the fruiting period is from August to October.

First, the growth habit of Schizonepeta tenuifolia prefers a warm, humid, sunny environment. The requirement of soil is not strict, but it is better to use loam or sandy loam which is deep, loose and fertile and rich in organic matter. Low-lying land, saline-alkali land and heavy clay should not be planted.

Second, select fields with high terrain and good drainage for soil preparation and fertilization, and cultivate them carefully. Combined with soil preparation, apply sufficient basic fertilizer: 3000 kg of soil miscellaneous fertilizer, 20 kg of urea and 50 kg of phosphorus and potassium fertilizer per mu. Then make beds and wait for sowing.

Third, sow Schizonepeta tenuifolia and propagate with seeds. Live broadcast is often used in production. It can also be raised and transplanted. The sowing time is spring sowing and summer sowing. Spring sowing before and after the Qingming Festival; summer sowing before and after Grain in Beard, mainly rape and wheat stubble. Before the direct seeding, the grass was used to open a shallow ditch on the finished border surface, and then the seeds were evenly scattered into the ditch, covered with soil, watered to preserve soil moisture, in order to facilitate seedling emergence. The sowing rate is 1 kilogram per mu. Raise seedlings before and after the Qingming Festival, sow the seeds evenly on the finished border surface, loosen the surface of the soil, make the soil cover without seeds, water to preserve moisture, in order to facilitate the emergence of seedlings. Strengthen the field management after completing the seedlings, and when the seedlings are 15 cm high, they can be transplanted. Transplant from May to June, select overcast and rainy weather, dig out the seedlings, plant them on the whole border according to the row spacing of 20 × 10 cm, and plant 3 seedlings in each hole. Watering to preserve soil moisture, in order to survive.

Fourth, after the field management of Jingjie seedlings or transplanting survived, attention should be paid to ploughing and weeding, frequent watering in dry weather and timely drainage in overcast and rainy weather. Topdressing should be done once before and after closure: 10 kg urea and 5 kg potassium dihydrogen phosphate per mu.

5. The main diseases of Schizonepeta tenuifolia are Rhizoctonia solani, black spot and stem wilt. Comprehensive control measures can be adopted in prevention and control: 1. Rotation should be carried out every 3 ~ 5 years. 2. Prophylaxis with 1 ∶ 1 ∶ Bordeaux solution before onset. 3. Carbendazim was used to control the disease at the initial stage of the disease. The main pest is Spodoptera litura, which can be killed by permethrin pesticide. Underground pests are trapped with poison bait.

6. Harvesting and processing Schizonepeta tenuifolia is generally harvested after most of Huahui is seeded. The root of the plant is cut off, dried in the sun and sold in medicine. The yield is 300 kilograms per mu. What is uprooted is called whole Schizonepeta tenuifolia. Those who cut off the upper flower are called Jing Mustard Hui. To dry, green, Huichang, strong aroma as a good product.