In the countryside, everyone used to look for weeds and wild fruits in the mountains. One kind of small bamboo covered with mottled flowers is very popular. Is "Polygonum cuspidatum", also known as "Bambusa", is a very tall weed, which can grow to more than 2 meters. Many people regard it as sugarcane, just bite off the skin and chew up the gravy inside and spit it out. Because of the sour taste, farmers also call it "sour jar stick" or "sour soup stalk"

Polygonum cuspidatum is the dried rhizome and root of Polygonum cuspidatum. Digging in spring and autumn, removing fibrous roots, washing, cutting short or thick slices when fresh, and drying. Distributed in northwest, east, central, south and southwest China.

Efficacy and action of Polygonum cuspidatum 0 1

1, Polygonum cuspidatum has the functions of expelling wind and removing dampness, promoting blood circulation and dredging collaterals. For patients with rheumatoid arthritis and joint swelling and fever, Polygonum cuspidatum can dispel wind and remove dampness, dredge collaterals and relieve pain. If there is traumatic injury or blood stasis swelling and pain, it can be decocted with single water or washed with water for external use, which has obvious effects.

2. Polygonum cuspidatum has the functions of clearing away heat and promoting diuresis, purging fire and detoxifying. In case of jaundice hepatitis, cholecystitis, acute urinary tract infection or burning pain, Polygonum cuspidatum can be combined with other heat-clearing and diuretic drugs. For acute and chronic sore throat, it can also be used with Fructus Forsythiae, Rhizoma Belamcandae, Calomelas or Radix Isatidis.

3. Polygonum cuspidatum has anticoagulant and hypolipidemic effects. Polygonum cuspidatum has a good effect on inhibiting platelet aggregation and protecting vascular endothelial cells.

4. Polygonum cuspidatum has the functions of cooling blood, relieving pain, relieving cough and resolving phlegm. Polygonum cuspidatum is effective in treating snake bites and scalds, and fresh products are taken for external use after snake bites; After being burned by fire or water, it can be used as powder alone, mixed with sesame oil, or ground with Sanguisorba officinalis and Borneolum Syntheticum for external application.

5. Polygonum cuspidatum can also be made into pesticide, which has a good effect on preventing and controlling stem borers and aphids; The rhizome and leaves of Polygonum cuspidatum contain tannin, which can be used to extract industrial tannin extract.

How much is a catty of Polygonum cuspidatum? Planting prospect of Polygonum cuspidatum

After removing the fibrous roots of Polygonum cuspidatum, clean it, cut it into short sections or thick slices while it is fresh, and dry it in the sun to make it into medicinal materials. At present, the market price is relatively stable, about 8- 10 yuan per catty. Nowadays, wild Polygonum cuspidatum is very rare. It is understood that 20 yuan, a wild giant knotweed, weighs about a catty.

Polygonum cuspidatum has remarkable medicinal value and is one of the raw materials of many kinds of Chinese patent medicines, and its development prospect in the pharmaceutical market is very considerable. At the same time, its root is also a yellow dye, which has certain industrial value.

Planting techniques of Polygonum cuspidatum

1, land selection and land preparation

Polygonum cuspidatum has developed root system, strong cold tolerance and drought tolerance, and low requirements for soil. But it is not suitable for planting in low-lying and waterlogged areas. After the planting site is selected, the soil should be ploughed 20-25cm, the larger stones should be removed, and the larger clods should be sown. Then apply 1500-2000 kg of fully decomposed manure as base fertilizer per mu. After fertilization, it should be mixed and stirred with the soil layer, and the ridge should be dug high, about 15-20cm high and 50-55cm wide.

2. Breeding method

The propagation mode of Polygonum cuspidatum is generally seeds and rhizomes, but it takes a long time from sowing to harvesting, and the germination rate of seeds is low and the propagation speed is slow, so rhizomes are often used for propagation in production. Moreover, rhizome propagation also has the characteristics of easy acquisition of materials, easy survival after transplantation and quick effect. Dig out the root system of the plant and divide it into several sections, each with 2-3 buds. Then open holes or furrows in the border for planting, and cover the soil and water after planting.

3. Tian Tuan management

After the seedlings are unearthed, with the increase of temperature, their growth rate will accelerate. Weeding should be done well at this time, and intertillage should be combined with weeding. When the seedlings grow to a certain extent, it is necessary to replant the seedlings in time to increase the ventilation and light transmission of the plants and avoid affecting the growth of the seedlings due to excessive growth. After planting, topdressing should be done in time according to the fertility of soil. General topdressing and quick-acting fertilizer combined with appropriate trace element fertilizer can be applied for 65,438+0-3 times.

4, pest control

The disease resistance of Polygonum cuspidatum is very strong, and there is no disease in the base during cultivation, mainly because pests affect the yield and quality of Polygonum cuspidatum. Among them, the common pests are scarab and leaf beetle. Scarabs occur around May and mainly eat tender tops and leaves of Polygonum cuspidatum. In severe cases, they will eat all the leaves of the whole plant at a very fast speed. It can be controlled by artificial killing, light trapping and killing, or sprayed with 2000 times of dimethoate chloride to kill adults.