High-yielding cultivation techniques of Tiannanxing

Tiannanxing, alias Nanxing, Palm Leaf Pinellia ternata, etc. Using underground corm as medicine has the effect of dispelling wind, dryness and dampness, removing phlegm and dispersing knots. It mainly treats facial nerve paralysis, hemiplegia, infantile typhoid, tetanus, epilepsy, cervical cancer and so on. External use can treat sores, swollen poison, snakebite and other diseases. The southern star is poisonous. The main producing areas are Northeast, Hebei, Shaanxi, Gansu, Henan, Hubei, Sichuan, Yunnan, Anhui and other provinces.

The morphological characteristic is the perennial herb of southern star family, the plant height is 20cm to 50cm, the whole plant is smooth and glabrous. The tuber is nearly spherical, only 1-5 cm, with many white fibrous roots around the upper part, with yellowish brown or yellowish leaf base remnants at the upper part, and a yellowish, smooth bottom. Leaves apical of tuber; long petiole Terete, base enlarged into sheath; leaf blade palmately divided, lobes long-elliptic, apex acuminate, entire. Monoecious; inflorescences, inflorescences apical lengthening into light green appendages, about 7 cm beyond the inflorescence; flame bracts lanceolate, with obvious longitudinal veins outside, grayish inside, lower tubular; unisexual flowers, male flowers densely attached to the upper part of the inflorescence, cylindrical; female flowers inserted in the lower part of the inflorescence, Adnate on the spawn, there is no gap between male and female flowers. Berries ovate, green.

First, growth habits. Tiannanxing likes warm and humid environment, likes water and fertilizer, is hardy, afraid of drought, afraid of stagnant water. The requirement of soil is not strict, but it is better to use loose and fertile sandy loam.

Second, soil preparation and fertilization. Select high-lying, well-drained fields 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 seeds. In the production of Artemisia angustifolia, the seed stem is used to propagate, and it can also be propagated by seed. The sowing time is divided into spring sowing and autumn sowing, and spring sowing is around the Qingming Festival. Winter sowing before freezing. Raise seedlings. Sow the seeds of Artemisia angustifolia evenly on the finished border surface. Strengthen field management. It can be transplanted after growing for one year, and the sowing amount is 3 kg per mu. Transplant. The seed stem of Artemisia angustifolia was planted on the whole border according to the row spacing of 20 × 10 cm. Watering to preserve soil moisture, in order to survive. Plant stems and propagate. Cut the bulb into seed blocks longitudinally according to the number of bud eyes. Dry for a long time, wait for the wound to heal before planting. When planting, it was first used to open a shallow ditch on the finished border surface, and then according to the row spacing of 20 × 15 cm, the seed stem of Artemisia angustifolia was planted on the border surface and watered to preserve soil moisture in order to survive. 70 kilograms per mu.

Fourth, field management. After the seedlings of Tiannanxing, attention should be paid to ploughing and weeding. If planting on a large scale, herbicides should be used to treat the soil before seedling, which can effectively control all kinds of weeds. Pay attention to drainage in cloudy and rainy weather and watering in dry weather. The Beginning of Autumn should be fertilized once before and after topdressing: 10 kg urea and 10 kg potassium dihydrogen phosphate per mu. After bolting, if there is no need to leave seeds, the flower buds should be cut off in time to reduce nutrient consumption.

Fifth, pest prevention and control. The main disease of Nanxing is virus disease, which produces yellow irregular spots on the leaves and curls deformities in severe cases. Carbendazim or aluminum ethyl phosphate can be used to prevent and cure the disease. The pests are mainly red spiders, which can be controlled by propargite.

Sixth, harvest and processing. It was harvested from late September to early October. Remove the soil from the Nanxing underground bulb, wash it with water, fumigate with sulfur, dry it and sell it. But it must be noted that Nanxing is poisonous and must not be imported when processing. Wash hands with soap after processing. The yield is 400 kilograms per mu.