Achyranthes is a dry root of the Achgranthes bidentata, also known as Achyranthes bidentata. With scattered blood circulation, eliminate phlegm, liver and kidney, strong bones, lower blood pressure and other functions. The main production of Henan, Hebei, Shanxi, Shandong, Jiangsu, Anhui and other provinces have also cultivated. (A) Morphological characteristics perennial herb, plant height 50 cm to 110 cm. The root is long cylindrical, fleshy, and the skin is white or brown. Stems erect, 4-angled, nodes as large as Achyranthes, with branching on nodes. Leaves opposite, leaves needle-shaped or oblong-elliptic, both surfaces pubescent. Spikes are terminal or axillary. Flowers are downward folds close to pedicels; each flower with 1 membranous bracts, apex acuminate, bracteoles 2, spiny; tepals 5, green, lanceolate, margin membranous, glossy; stamens 5; Pistil 1, ovary oblong. Umbrella oblong, brown, 1 seed, oblong, tan. Flowering from August to September, fruiting period from September to October. (B) Growth habits Achyranthes hi warm and dry environmental conditions, intolerant of cold, due to deep root system, it is resistant to fertility, after August for the root growth period. The seeds are easy to germinate, and the germination temperature is 15C to 30C. Seed life is l ~ 2 years. (III) Cultivation Techniques 1. The land and soil preparation sites should be selected for warm soil, deep soil, loose fertile and well-drained sandy loam soil. For every 1,000 square meters, apply 6 000 kilograms of homeland fertilizer, apply 60 kilograms of superphosphate, deep-turn 50 centimeters, make fine leveling, and make a 1.3-meter-wide plutonium. 2. Propagation method uses seeds for propagation, generally sowing in mid-July and late. Seeds soaked in 20C warm water for 24 hours before sowing, remove and drain, mix a small amount of fine sand, and set the distance by 20 centimeters, and open 1 centimeter to 2 centimeters deep. Shallow ditch drilling, sowing after the cover soil to cover the seeds for the degree, a little suppression, watering. It can also be sowed. The seed amount per 1000 square meters is about 1.5 kilograms. Usually 5 to 7 days after sowing can emerge. 3. Field management (1) seedlings, Dingmiao: seedling height 7 cm time seedlings, seedlings height 17 cm to 20 cm when the 15 cm group spacing seedlings. (2) Intertillage and weed control: 2 to 3 times before and after the fixed seedlings, combined with shallow slashing soil, the fine roots in the topsoil will be cut off, which will facilitate the growth of the main root. (3) Top dressing: Generally after Dingmiao, from July to August, depending on the situation of the seedlings, topdressing of thin stools and urine once, such as foot fat, can not be applied. (4) Drainage irrigation: In addition to the seedlings often need to keep the soil moist, generally should not be more watering later to prevent extravagance on the ground. In the rainy season, water should be promptly removed. (5) Topping: When the buds are cut off, the top buds are cut off in time, usually 2 or 3 times, and the plant height is controlled at about 45 cm. 4. Disease and Insect Pest Control (1) White rust: Spring and autumn are prone to cold when it is cold and rainy, and mainly damage the leaves. Control methods: Clean the garden, remove the diseased plants, and spray them with 1:1:120 Bordeaux mixture or 50% wettable thiophanate-methyl 1000 times. (2) Leaf spot: Occurs in summer and damages the leaves. Control methods are the same as above. (3) Spodoptera exigua larvae feed on leaves. Control methods: manual kill; spray with 90% trichlorfon 800 times. In addition, there are still root rot, cabbage caterpillar, cotton red spider and other damage. (D) Harvesting and processing sowing 11-December when the plant was excavated. At the time of harvest, first cut off the stems and leaves, dig a 60-cm deep ditch from one end of the cocoon, dig out the roots in sequence, remove the clay, cut the head of the reed, smoke for 4 to 5 hours with sulfur, and then dry or bake it to 78% When dry, straighten and tie them into small ones, stacking and boring for 2 to 3 days before drying to dry. (E) Seed-retaining techniques Individuals are selected in the field before harvesting. Plants with moderately high plant height, round leaf hypertrophy, robust plants and no pests should be marked. When harvesting, excavate alone, then choose root length, uniform thickness, large roots without lateral roots, roots with less color than white, and roots with no more than 3 roots as seeding roots, planted at a spacing of 40 X 50 cm, planted easily or Planted in the spring after cellaring. From September to October, the seeds matured, and when they were yellow-brown, the seeds were collected, dried, and stored in a dry place after being mixed.