Useful and therapeutic properties of Rhubarb Tangut

August 12, 2017 17:59 | Drug Plants

Synonyms: rabarbar Chinese rapontik, Rheum palmatum.

description.A large perennial herb of the family Polygonaceae (Polygonaceae) up to 2 m, with a thick rhizome and large succulent roots.Stems with a few leaves, naked, inside - hollow.Radical leaves large, petiole length with up to 0.75-1.5 m plate length - 80, width - 75 cm. The leaves are separated, with the pinnatifid particles.Stem leaves are alternate, ovate, with a dry film socket near the base.From the second or third year rhubarb culture develops large paniculate branched inflorescence.Flowers small, regular, white, green or pink.Fruit - three

sided nut red-brown color.Weight of 1000 seeds -

13-15 of

medicinal raw materials: roots.

Biological features.Rhubarb grows where during the growing season is a high soil moisture and air.However, the plant does not tolerate close occurrence of groundwater (at least 3 meters).The wetlands and in areas with prolonged standing water, usually dies.For 3-4 years rhubarb forms a large above-ground mas

s and a well-developed root system that penetrates to a depth of 40-50 cm. This development is possible only in deep, fertile, well-drained and loamy soils.Heavy clay, sandy and marshy soil for growing this plant is not suitable.In freshly harvested seeds Rhubarb Tangut high germination - 85-90%.Its minimum germination temperature - 5-6 ° C, the optimum - 15-20 At this temperature, humidity and good seeds swell for 48-50 hours, while soaking 100-120% of their weight of water.The first shoots appear already at 5-6 days, fully rises - 14-16 th at

.Seed germination is maintained for 4-5 years, and is the fourth year, 70-75% of the original.

Distribution.Homeland Tangut rhubarb - mountain forests of central China.In Ukraine, it is cultivated as a medicinal plant.

chemical composition.The roots and rhizome of rhubarb Tangut contain antraglikozidy (5%) and their aglycones and primary forms - anthranol, tannins (12%), tar and pectin, starch, glucose, gallic and cinnamic acids as well as significant amounts of calcium oxalate.The structure includes antraglikozidov gluco-reumemodin, hrizofanein, reohrizin and gluco-aloe-emodin.

Application.The main active ingredients of the plant are antraglikozidy and tannins.Antraglikozidy digested in the large intestine, forming rhein reumemodin and hrizofanolovuyu acid irritating the nerve endings of the intestinal wall, and have a laxative effect.Tannins exhibit astringent and anti-inflammatory effect.The biological effect of Rhubarb Tangut dose-dependent: at high doses

it acts as a laxative (the result appears after 8-10 hours), low-dose observed antidiarrheal effect.Laxative and astringent effect also depend on the solvent used during the preparation of drugs: aqueous preparations generally have an irritating effect (antraglikozidy highly soluble in water), alcohol - astringent (tannins are more soluble in alcohol).Herbal medicines and Rhubarb Tangut used as a choleretic agent.Appointed rhubarb mostly elderly patients and children as a laxative for intestinal atony, flatulence and chronic constipation.Dose choose individually.In small doses (0.05-0.2 g) rhubarb helps with dyspepsia and catarrh of the stomach with low acidity.

rhubarb preparations are contraindicated in acute appendicitis and cholecystitis, acute peritonitis, intestinal obstruction and bleeding from the gastrointestinal tract during pregnancy.Avoid using them to treat gout, catarrh of the bladder and oxaluria.Long-term use of rhubarb strengthens constipation.

Agrotehnika growing.Site selection.Best for Culture rhubarb black soil with light texture, structure, fertile soils and orchard-garden-type, protected from the north winds, with a deep layer of topsoil and limestone soils drained peatlands.The best precursors are considered to be pure and engaged couples, row crops, and winter coming on fertilizers.

Tillage.The main autumn plowing on plowing is recommended at a depth of 27-30 cm. If a field after the crops, three weeks before plowing the stubble luschat.With a significant soil compaction after winter plowing to a depth of 14-16 cm if the soil is not compacted, it is sufficient prokultivirovat to a depth of 8-10 cm.

fertilization.By deep plowing, depending on the fertility of the soil is made of 40-80 t / ha of manure and 3-8 kg / ha of superphosphate.If the farm a little manure, making it equally with the appropriate amount of fertilizer.

reproduction.Rhubarb reproduces sowing seeds directly into the soil in early spring, in late summer or autumn

zdney.Spring and summer are seeded 7-8, and in autumn for 9-10 kg / ha.

Care plantations is to cover the destruction by fluffing between rows, weeding the weeds and seedlings on podsazhivanii sparse areas.First Sharovka between rows is carried out immediately after emergence, following 3-4 during the summer;2-3 times weed out the weeds in the rows.The first time fed mainly fertilizers rate of 30 kg / ha of active substance (nitrogen, phosphate, potash).During the second feeding make 2-3 t / ha of manure and 1 kg / ha of superphosphate.

Harvesting.Rhubarb is harvested in August-September tractor moldboard plows for 3-4 year culture.Dug rhizomes and roots clear of the ground, washed, cut the aboveground mass and remove damaged parts.Then cut into pieces with a length of 15 and 3-4 cm thick and laid out for 3-4 days under a shed or the attic for pre-drying.

drying.Finally dried roots and rhizomes in the firing kilns at a temperature of 60 °.After decrease their moisture content to 12%, the drying was stopped.In clear weather dried in the open air, hanging on the roots of the splits in the shade, or in the attic under a tin roof.

Packaging.Pack roots lined with paper inside the wooden crates of 20-25 kg or in double bags.

Storage.The dried roots should be stored in sealed boxes or boxes to prevent damage to plant pests, yellowing and loss of commercial quality due to the high hygroscopicity.

Quality requirements.Raw materials must meet the requirements of the State Pharmacopoeia XI (FS-68, pp. 352-356).

Growing seeds.The highest seed yield rhubarb gives starting with 4-5 years of culture.In this connection, it is recommended to take the cultivation of seeds of specific areas with a light fertile soil, protected from cold northern winds.Farming equipment cultivation and care of the plantations are the same as on the economic crops of rhubarb, but the food area should be 70x70 cm. Blooming plants around the second half of May to the end of June, behold

exchange ripen in early July.To avoid clogging of Rheum palmatum other types of rhubarb, which is possible due to cross-pollination, before flowering is necessary to remove other types of plants.The average seed yield with good care the plants is 8-10 t / ha.