49 results about "Glycyrrhiza lepidota" patented technology

The invention provides herbaceous plant nutritive water based on an emulsified microcapsule and a preparation method of the herbaceous plant nutritive water. The preparation method comprises the following specific steps: mixing hydrogenated vegetable oil, low erucic acid rapeseed oil , siloxane, microcrystalline wax and diglycerol, heating and uniformly stirring, and performing heat reservation and sterilization to obtain an oil phase; adding ethylene glycol, propylene glycol, glycine betaine, urea, poly-sodium glutamate, triethanolamine, caprylhydroxamic acid and hexylene glycol into deionized water, heating and uniformly stirring, performing heat preservation and sterilization to obtain a water phase; adding the oil phase into the water phase, performing heating, homogenization and low-speed stirring, adding cetyl ethyl hexanoate and stearic acid, then slowly adding PEG-40 hydrogenated castor oil and a microcapsule wall material, cooling, adding tremella, centella asiatica, polygonum cuspidatum, scutellaria baicalensis, tea leaves, glycyrrhiza glabra, female chrysanthemum, rosemary leaves, beer saccharomycete and grape fruit cell extract active components, and adding chondrus crispus extracts, bio-saccharide gum-1, diglycerol, palmitoyl tripeptide-1 and essence for mixing to obtain the herbaceous plant nutritive water based on the emulsified microcapsule.

The invention discloses no-antibiotic feed for a piglet. The no-antibiotic feed comprises the following materials: expanded corns, soybean meal, expanded soybeans, flour, whey powder, fish meal, soybean concentrated protein, plasma protein powder, soybean phospholipid, sucrose, glucose, sodium chloride, calcium lactate, calcium dihydrogen phoshate, special enzyme for a baby pig, a detoxication agent, citric acid, sodium butyrate, eucommia bark extract, xylooligosaccharide, lactobacillus, a phagostimulant and compound premix, wherein the phagostimulant contains calcined oyster shell powder, fiveleaf gynostemma herb, lalang grass rhizome, pine needle, denucleated wild jujubes, malic acid, radix glycyrrhizae preparata, royal jelly freeze-dried powder and peony cake meal. The no-antibiotic feed and the preparation process disclosed by the invention have the advantages that by the feed formula, the growth performance and the immunity of the piglet can be obviously improved; and by the mode of proportioned nutrition, the diarrhea and the death rate of the piglet are reduced, the effect of preventing and treating diseases is achieved and the feeding attraction and growth-promoting effects are obvious.

The invention discloses a Chinese medicinal composition for treating diarrhea and a preparation method of the Chinese medicinal composition. The composition comprises (by weight) 5-10 parts of Flos Lonicerae, 8-12 parts of Herba Taraxaci, 9-11 parts of Radix Codonopsis, 4-6 parts of Rhizome Atractylodes Lancea, 3-5 parts of Radix Paeoniae Alba, 3-8 parts of Glycyrrhizae Radix, 3-8 parts of Radix Scutellariae, 8-12 parts of Ramulus Cinnamomi, 9-11 parts of Radix Saposhnikoviae, 8-12 parts of Herba Moslae, 10-20 parts of Flos Chrysanthemi, 3-8 parts of Herba Schizonepetae, 4-6 parts of Poria, 8-12 parts of Pericarpium Citri Tangerinae, 3-8 parts of Perillae Herba, 5-10 parts of Folium Mori, 3-5 parts of Herba Violae, 1-3 parts of Herba Patriniae, 5-10 parts of Sargent gloryvine, 8-12 parts of Herba Portulacae, 3-8 parts of Herba Andrographitis, 8-12 parts of Mume Fructus, 5-10 parts of Radix Puerariae, 3-8 parts of Herba Houttuyniae, 3-5 parts of Herba Hedyotis Auriculariae, and 5-10 parts of Radix Sophorae Flavescentis. The composition is orally administered in form of decoction. The composition has significant effect in treating diarrhea, and effect in invigorating liver, spleen and kidney, and has the advantages of low cost, good curative effect, and no toxic and side effects.

The present invention relates to methods for induction production of hairy roots through infection of Glycyrrihiza uralensisi Fisch seedling stem nodes by using Agrobacterium rhizogenes, and production of medicinal secondary metabolites (such as liquiritin, glycyrrhizic acid and the like) by using the hairy roots, particularly to a method for efficient induction production of Glycyrrihiza uralensisi Fisch hairy roots and a method for production of licorice root secondary metabolites by using the hairy roots. The method is characterized by comprising: (1) obtaining sterile explants, wherein Glycyrrihiza uralensisi Fisch seeds are taken, sterilized, and then inoculated in a seedling culture medium to culture to obtain sterile seedlings with a plant age of 12-15 d, and the roots are cut so as to be adopted as the explants; (2) preparing an Agrobacterium rhizogenes engineering bacteria solution; and (3) inducing production of hairy roots through needling stem nodes. According to the present invention, the method for efficient and stable induction production of the Glycyrrihiza uralensisi Fisch hairy roots is provided, and the obtained Glycyrrihiza uralensisi Fisch hairy roots are subjected to suspension culture through selecting the appropriate liquid culture medium and are used for producing the medicinal secondary metabolites (such as liquiritin, glycyrrhizic acid and the like).

The invention provides a culture method of glycyrrhiza hairy roots and a method for preparing glycyrrhiza total flavonoids from glycyrrhiza hairy roots and culture solution thereof. The method comprises the following steps: culturing glycyrrhiza hairy roots in a fluid nutrient medium which does not contain Tween to the growth peak period; culturing the obtained glycyrrhiza hairy roots in the growth peak period in a fluid nutrient medium which contains Tween for more than 5 days; and eluting by ethanol with different concentration through a polyamide chromatography column, and separating the total flavonoids from the culture solution, wherein the transfer rate of the glycyrrhiza total flavonoids is 97.23%, the transfer rate of glycyrrhiza chalcone A is 98.14%, and the transfer rate of Glabridin is 97.54%. The invention also provides the glycyrrhiza total flavonoids prepared by the method and medical applications of the glycyrrhiza total flavonoids.

The invention provides a medicament for treating thrush. The medicament comprises the following components by weight: 6-15 parts of Sophora flavescens, 6-12 parts of gallnut, 8-15 parts of radish seed, 8-12 parts of Herba Artemisiae Scopariae,8-15 parts of licorice and 1-3 parts of rhubarb. The invention has the advantages and positive effects of obvious curative effect, quick effectiveness, high quality and cheap price.

The invention provides a method for preparing licochalcone A. The method comprises the following steps: culturing glycyrrhiza inflata hairy roots or glycyrrhiza inflata seedlings in a culture medium containing a DNA methyltransferase inhibitor for not less than three days, collecting roots of the glycyrrhiza inflata hairy roots or glycyrrhiza inflata seedlings, and extracting the licochalcone A. The culture medium containing the DNA methyltransferase inhibitor is used for culturing glycyrrhiza inflate seedlings or glycyrrhiza inflate hairy roots, so that the DNA methylation degree of the glycyrrhiza inflate seedlings or glycyrrhiza inflate hairy roots can be reduced; and genes which are originally silent or low in expression quantity and are beneficial to accumulation of licochalcone A are reactivated, so that the content of licochalcone A is quickly and effectively increased.

A saline alkali soil amendment comprises a probiotic activity keeping liquid and complex probiotics, wherein the probiotic activity keeping liquid is used for keeping activity of complex probiotics and improving stress resistance of the complex probiotics, is a liquid prepared from a mixture of radix glycyrrhizae, cortex cinnamomi, radix codonopsis and Pennisetum flaccidum rhizome by fermentationwith the complex probiotics in water, and the mass ratio of the radix glycyrrhizae, the cortex cinnamomi, the radix codonopsis and the Pennisetum flaccidum rhizome is 1:1:1:1; the complex probiotics contain lactic acid bacteria, saccharomycetes, Bacillus subtilis, Bacillus megaterium and Bacillus licheniformis which are in the amount ratio being 1:1:1:1:1. The invention further provides a preparation method of the saline alkali soil amendment and a soil amending method for reducing salt content and pH of the soil by adopting the saline alkali soil amendment. By combining with the soil amendingmethod, the prepared complex probiotics can keep good activity in the soil, and pH and salt concentration of the soil are reduced effectively.

The invention discloses C-glycosyl transferase and application thereof in synthesis of schaftoside and isoschaftoside. 2-hydroxyflavanone C-glycosyl transferase genes (SbCGTa, GuCGTa, PsCGTa, LpCGTa and AeCGTa) and C-glucose-2-hydroxyflavanone C-glycosyl transferase genes (SbCGTb, ZmCGTb, OsCGTb1, OsCGTb2, GuCGTb, PsCGTb, LpCGTb and AeCGTb) are separated from scutellaria baicalensis, corn, rice, licorice, pistia stratiotes, spirodela oligorrhiza and arisaema erubescens. The invention finds for the first time that proteins coded by the genes participate in synthesis of phytoalexin schaftoside and isoschaftoside in plants, so that a feasible method is provided for synthesizing the schaftoside, the isoschaftoside and analogues thereof by utilizing enzyme catalysis in vitro.

The present invention discloses a medicinal composition which is used for treating dyspepsia, and comprises the following ingredients: 45 to 50 portions of large hawthorn, 45 to 55 portions of malt, 45 to 55 portions of medicated leaven, 50 to 80 portions of mung beans, 45 to 55 portions of Astraolylis lancea formalyrata, 40 to 55 portions of folium perillae acutae, 70 to 80 portions of baked licorice, 45 to 55 portions of bark of official magnolia, 60 to 80 portions of dandelion, and 45 to 65 portions of corydalis tuber. The medicinal composition can be used for treating the dyspepsia, and has the advantages of simple preparation process, significant effects, and low costs.

The invention provides a preparation method of a podocarpus macrophyllus nutrient soil. The preparation method comprises the following steps: crushing and then mixing the following ingredients in parts by weight: 50-60 parts of garden soil, 10-15 parts of peat, 3-5 parts of plant ash, 3-5 parts of glycyrrhiza residues, 1-2 parts of bran, 1-2 parts of decomposed pig manure and 0.03-0.05 part of hydrated lime; disinfecting and drying the crushed mixture to obtain the podocarpus macrophyllus nutrient soil. The podocarpus macrophyllus nutrient soil can provide all nutrients required for podocarpus macrophyllus growth, and after the podocarpus macrophyllus nutrient soil is applied, additional fertilizer application is not required, and podocarpus macrophyllus is vigorous in growth and dark green in leaf.

The invention discloses a method for doubling glycyrrhiza pallidiflora maxim chromosomes through tissue culture. Dry and mature glycyrrhiza pallidiflora maxim seeds serve as materials, and the steps of seed pretreatment, aseptic seedling obtaining, culture medium screening of best induced calluses, glycyrrhiza pallidiflora maxim callus processing through colchicines and subculture are executed. The glycyrrhiza pallidiflora maxim seeds are induced through the colchicines to double the chromosomes so as to obtain excellent seed sources of liquorice, and the situation that in the liquorice market, the demand exceeds the supply is remitted.

The invention discloses a cortex phellodendri and radix glycyrrhizae acne-removing plant composition. The plant composition comprises the following components in parts by weight: 10-90 parts of a cortex phellodendri extract and 10-90 parts of radix glycyrrhizae extract, wherein the total weight part is 100. According to the cortex phellodendri and radix glycyrrhizae acne-removing plant composition, the cortex phellodendri and the radix glycyrrhizae are directly compounded and combined into the plant composition, and proliferation of pathogenic bacteria related to acne can be effectively inhibited, so that acne is treated, prevented and treated. The invention further discloses application of the cortex phellodendri and radix glycyrrhizae acne-removing plant composition.

The invention discloses a water-saving and fertilizer-saving method of crop rotation of winter wheat and summer corn, and belongs to the technical field of agricultural planting. The water-saving andfertilizer-saving method includes the steps: applying base fertilizer again before sowing of winter wheat, crushing corn stalks evenly, covering wheat planting rows with the crushed corn stalks, performing winter irrigation once after emergence of wheat seedlings, performing topdressing of urea at the jointing stage, applying foliar fertilizer A at the filling stage, crushing straw obtained afterharvest of winter wheat, returning the crushed straw to the field, then performing deep tillage and drying on the planting field 1-2 times, applying base fertilizer of nitrogen-phosphorus-potassium compound fertilizer before sowing of the summer corn, adopting a cultivation mode of ridge culture, covering a mulching film, performing irrigation once at the jointing stage, applying foliar fertilizerB from the tasseling stage to the flowering stage, and applying the foliar fertilizer B again in the grain formation period, wherein the foliar fertilizer A is prepared from the following materials:in percent by mass, 50-80% of humic acid, 25-50% of glycyrrhiza polysaccharide and 2-20% of boric acid, and the foliar fertilizer B is prepared from the following raw materials: in percent by mass, 50-80% of humic acid, 25-50% of glycyrrhiza polysaccharide and 5-20% of potassium nitrate. Through the water-fertilizer management method, water and fertilizer are saved, and meanwhile, the winter wheatand summer corn can have high yield.

An efficient pesticide residue degradation agent is prepared from the following raw materials by weight: 6-11 parts of calcium hydroxide, 4-8 parts of wild chrysanthemum, 3-7 parts of monosodium glycyrrhizinate, 1-5 parts of active calcium, 5-9 parts of sodium bicarbonate, 4-8 parts of fatty alcohol polyoxyethylene ether, 2-7 parts of sodium dodecyl benzene sulfonate, 5-10 parts of citric acid, 2-5 parts of polyether modified silicone oil, 6-8 parts of sodium citrate, 1-5 parts of fructus arctii and 3-6 parts of sesame oil. The invention has the beneficial effect that the efficient pesticide residue degradation agent can effectively decompose and melt pesticide residual on the crops, and has good cleaning ability, and no residue.

A composite organic fertilizer for foliage-ornamental plants is prepared from following components, by weight, 3-5 parts of turfy soil, 2-3 parts of green straw, 3-5 parts of chicken manure, 1-2 parts of soybean cake, 1-2 parts of beetles, 1-2 parts of white sugar, 0.5-1 part of walnut tree branches and 0.5-1 part of radix glycyrrhizae. The fertilizer enables leaves to have a strong green and bright color, thereby greatly improving ornamental value of the plants.

The invention relates to a Zhuang medicine preparation for preventing and treating hyperuricemia. The Zhuang medicine preparation is prepared from the following raw materials in parts by weight: 10-20parts of all-grass of selaginella doederleinii hieron, 5-15 parts of radix berchemiae lineatae, 5-15 parts of Japanese claw fern herb, 20-40 parts of common scouring rush herb, 20-40 parts of lalanggrass rhizome, 10-20 parts of herba desmodii styracifolii, 10-20 parts of herba leonuri, 5-15 parts of rhizoma smilacis glabrae, 5-15 parts of lignum sappan, 5-15 parts of triquetrous tadehagi herb, 5-15 parts of herba ardisiae japonicae and 2-10 parts of radix glycyrrhizae. The Zhuang medicine preparation for preventing and treating hyperuricemia improves the current clinical treatment dilemma ofhyperuricemia, has the treatment effects of clearing heat, promoting diuresis, reducing blood uric acid, having a certain kidney protection effect and the like, can obviously improve the glomerular filtration rate and promote uric acid excretion, and is obvious in curative effect advantage and relatively low in price.

The invention provides extraction and purification of glycyrrhiza uralensis submicron powder polysaccharide. The extraction and purification method comprises the following steps: S1, preparing glycyrrhiza uralensis submicron powder; S2, preparing a glycyrrhiza polysaccharide crude product; S3, dissolving the glycyrrhiza polysaccharide crude product into distilled water, and passing through a 0.30-0.50 mu m microfiltration membrane; S4, diluting the glycyrrhiza polysaccharide solution, enabling the glycyrrhiza polysaccharide solution to pass through a DEAE-52 cellulose chromatographic column for three times, and freeze-drying to obtain purified glycyrrhiza polysaccharide. The extraction method is high in glycyrrhiza polysaccharide yield, and glycyrrhiza polysaccharide obtained through the purification method is high in purity.

The invention provides a radix ginseng and poria cocos colloid. The radix ginseng and poria cocos colloid comprises the following raw materials of radix ginseng, poria cocos, rhizoma dioscoreae, semenlablab album, semen nelumbinis, semen coicis, radix glycyrrhizae and fructus amomi. The invention further provides a preparation method of the radix ginseng and poria cocos colloid. All the raw materials in an edible and medicinal list are selected; and the radix ginseng and poria cocos colloid is very helpful for solving the problems of damp evil endogenesis, gastrointestinal dyspepsia, tiredness and weakness caused by spleen and stomach qi deficiency, and is high in safety.

The invention relates to the field of daily chemical products, and discloses a moisturizing composition and an application thereof and toning lotion, wherein the moisturizing composition comprises the components: deionized water, a first moisturizer, a second moisturizer, beta-glucan, pullulan, betaine, butyrospermum parkii butter, sunflower seed oil, a seaweed extract, a centella asiatica extract, a polygonum cuspidatum root extract, a scutellaria baicalensis root extract, a tea leaf extract, a glycyrrhiza glabra root extract, a chamomilla recutita flower extract and a rosemary leaf extract. According to the invention, the centella asiatica extract, the polygonum cuspidatum root extract and the like are selected as skin conditioning agents, a plurality of humectant components are added, and all the components are synergistically matched and are applied to the toning lotion, so that moisture can be supplemented to skin, the phenomena of dryness, roughness, water shortage and the like of the skin can be relieved, and the toning lotion has a remarkable moisturizing effect.

The invention discloses a micropterus salmoides immune nutritional functional feed composition and a preparation method thereof. The micropterus salmoides immune nutritional functional feed composition comprises the following main raw materials: fish meal, flour, whole shrimp meal and wheat gluten. The process is simple, fish meal, flour, whole shrimp meal, wheat gluten, beer yeast, fish oil, soybean lecithin, monocalcium phosphate, chicken meal, minerals, a phagostimulant, vitamin C, astragalus polysaccharide, glycyrrhiza polysaccharide, haematococcus pluvialis and cordyceps militaris are utilized, nutrient substances with different characteristics are optimized, compounded and combined, and the immune nutritional functional feed is produced. The feed has the effects of being rich in nutrition, clean, sanitary and capable of increasing the yield of aquatic products, and particularly has an excellent effect of improving the immunity of organisms; and moreover, the feed is more sanitary in preparation mode, low in equipment requirement and high in operability, has good social popularization and application, can remarkably promote growth and shorten the breeding period, and effectively improves the natural immunity and the anti-stress capability of micropterus salmoides.

The invention relates to a snakegourd seed containing medicine for treatment of acute suppurative mastitis. The medicine is prepared from 30g of snakegourd seeds, 3g of pericarpium citri reticulatae viride, 6g of gypsum fibrosum, 1.5g of radix glycyrrhiza, 1.5g of myrrh, 1.5g of radix angelicae lateralis preparata, 1.5g of spina gleditsiae, 1.5g of honeysuckle and 6ml of green tangerine leaf juice. The snakegourd seed containing medicine for treatment of acute suppurative mastitis has efficacies of heat clearing, detoxifying, blood activating and stasis removing and is excellent in curative effect of acute suppurative mastitis.

The invention discloses plant cool and refreshing extract. The plant cool and refreshing extract is prepared from radix salviae miltiorrhizae, peach branches, radix angelicae, alpine yarrow herb, green tea, chrysanthemum flowers, herba portulacae, snake slough, cicada slough, d-borneol, honeysuckle flowers, mints, pogostemon cablin, aloes, radix paeoniae rubra, lophatherum gracile, radix glycyrrhiza, rheum officinale, rheum officinale and lotus leaves. The invention further discloses plant cool and refreshing body wash and the plant cool and refreshing extractive. The plant cool and refreshing body wash and the plant cool and refreshing extractive have the effect of preventing prickly heat.

The invention relates to a thin-layer chromatography method for identifying liquorice, glycyrrhiza inflate and glycyrrhiza glabra easily and rapidly. Specifically, the method includes: 1), taking a liquorice reference crude herb and a glycyrrhiza inflate reference crude herb, and adding methyl alcohol or an ethanol solution to the reference crude herbs to prepare reference crude herb solutions; 2), taking coarse powder of the three herbs of liquorice, glycyrrhiza inflate and glycyrrhiza glabra prior to performing ultrasonic processing by adding a solvent to obtain test solutions of liquorice, glycyrrhiza inflate and glycyrrhiza glabra; 3), respectively absorbing the proper reference crude herb solutions and test solutions and applying samples on a reversed-phase thin layer plate; 4), performing development by taking 0.1% of a phosphoric solution and ethyl alcohol in proportion as a developing solvent and taking out after development prior to performing drying; 5), identifying the liquorice, glycyrrhiza inflate and glycyrrhiza glabra by comparison of spots in a chromatogram. The different spots are displayed in the three sources of the liquorice in the chromatogram, and the method is high in specificity and capable of identifying the liquorice, glycyrrhiza inflate and glycyrrhiza glabra accurately.

The invention discloses a method for intensive high-yield cultivation of cistanche deserticola. The method comprises: a high-density cultivation technology of haloxylon ammodendron, digging of planting furrows before planting of haloxylon ammodendron and cistanche deserticola, application of a biological organic fertilizer, a treatment and sowing method of cistanche deserticola seeds, and a methodof ''seedlings grow along with water'', namely a water drilling process and a drip irrigation process for water supplementation, so that a solid foundation is laid for the growth of the haloxylon ammodendron and high yield of the cistanche deserticola. The haloxylon ammodendron and the cistanche deserticola are second-class national protected plants, and are listed in ''international wild plant protection list'' and the document No.13 issued by the State Council in 2000, and the document No.271 issued by the State Economic and Trade Commission in 2001 stipulate that an exclusive licence system is implemented for cistanche deserticola, saussurea involucrate, glycyrrhiza uralensis and ephedra, digging of wild cistanche deserticola is forbidden, and artificial planting is encouraged. The method provided by the invention meets the demand of the market for rare traditional Chinese medicine cistanche deserticola, and protects the endangered species of cistanche deserticola.

The invention discloses a sandalwood mask and a preparation method thereof. According to the sandalwood mask disclosed by the invention, an sandalwood extract, a beet root extract, a honeysuckle flower extract, a centella asiatica extract, a polygonum cuspidatum root extract, a scutellaria baicalensis root extract, a tea leaf extract, a glycyrrhiza glabra root extract, a chamomilla recutita flower extract, a rosemary leaf extract, a dendrobium officinale extract and a radix gentianae extract which are natural components are added; through the synergistic effect of the twelve natural extracts, the prepared mask has the effects of deep moisturizing, soothing and repairing, whitening and moistening, skin tightening, sensitivity resisting, aging delaying and the like, and the sandalwood mask adopts pure natural components, is harmless to a human body, and has no irritation to the skin. The mask integrates the medical theory and the natural product cosmetic theory, is good in stability, and does not contain heavy metal ions or other toxic components.

The invention discloses a preparation method of a poplar flower and purslane composite pig feed additive. The method comprises the following steps: mixing and freezing poplar flower and purslane to -10 to -5 DEG C, keeping the temperature for 10-20 minutes, performing pulverizing at low temperature, performing heating to room temperature, adding and mixing astragalus polysaccharide, glycyrrhiza polysaccharide, polysaccharide Krestin and codonopsis pilosula polysaccharide, and performing grinding to obtain ground slurry; adding water into the ground slurry, performing uniform stirring, adding crude fiber enzyme, alpha-amylase and saccharomycetes, performing low-speed stirring at 30-36 DEG C for 2-6h, performing heating to 50-70 DEG C, performing continuous stirring, performing cooling to 40-50 DEG C, adjusting the pH value of the system to 5.1-5.5, adding acid protease, and performing stirring so as to obtain an enzymolysis material; and adding egg yolk immunoglobulin, zinc glycinate and dry beer vinasse into the enzymolysis material, performing uniform mixing and concentration, adding attapulgite and corn starch, and performing uniform mixing, granulation and drying so as to obtainthe poplar flower and purslane compound pig feed additive.

The invention discloses a method for measuring the concentration of semiglycyrrhizin isoflavone B in blood plasma. The liquid-mass spectrometry system is used for the measurement. Firstly, the sample to be tested is taken, and a certain amount of organic solvent protein precipitation agent is added to carry out protein precipitation. After pretreatment, the method is chromatographically Column separation and detection by a mass spectrometer, the method of the invention is fast, accurate, high in sensitivity and easy to operate, and is suitable for determining the concentration of the semiglycyrrhizin isoflavone B in blood plasma.

The invention provides a composition and application thereof in preparation of medicines. The composition comprises 12-18 parts by weight of scutellaria baicalensis, 8-12 parts by weight of cortex phellodendri, 2-8 parts by weight of dahurian patrinia herb, 2-8 parts by weight of hairyvein agrimony, 2-8 parts by weight of forsythia suspense, 2-8 parts by weight of licorice, and 2-8 parts by weightof sanguisorba officinalis. The composition disclosed by the invention can effectively prevent or treat diseases caused by escherichia coli infection of an organism, and has theoretical research andclinical application values.

The invention discloses a feed additive for preventing avian influenza of laying hens. The feed additive comprises the following components in parts by weight: 20-40 parts of isatis root, 20-40 parts of codonopsis pilosula, 20-40 parts of stephania tetrandra s.moore, 20-40 parts of folium isatidis, 20-40 parts of honeysuckle, 10-20 parts of ophiopogon japonicus, 10-20 parts of radix bupleuri, 5-15 parts of schisandra chinensis, 5-15 parts of hawthorn fruits and 5-15 parts of glycyrrhiza. The feed additive for preventing avian influenza of laying hens provided in the invention has the advantages of remarkable disease preventing effect, wide application, high safety, wide raw material source and low price.