51 results about "Water Lettuces" patented technology

The invention discloses an application of berberine as an herbicide. It is found through researches that berberine has an obvious weeding effect of clearing various weeds. In particular, berberine mixed with other herbicides such as glyphosate or acetochlor has a better weeding effect, wherein the mass ratio of berberine to other herbicide is preferably 1-2: 1. Berberine can be used to observablyinhibit the root growth or plant growth of weeds such as water lettuce, water hyacinth, duckweed, Arabidopsis thaliana, Bidens pilosa, Celosia argentea, Conyza bonariensis, Mikania micrantha and the like, and has a good weeding effect.

The invention relates to a crocodile ecological-breeding method which is characterized in that a crocodile ecological-breeding base comprises a crocodile breeding pond (1) and a water purification pond (2), the crocodile breeding pond (1) is positioned at the periphery, the water purification pond (2) is positioned in the middle, the water body of the crocodile breeding pond (1) and the water body of the water purification pond (2) can mutually exchange, the area of each pool of the crocodile breeding pond (1) is 3 to 8 Mu, and daffodils and water lettuces are planted in the water purification pond (2) and white carp, bighead carp and Tilapia fishes are cultivated in the water purification pond (2), so as to purify the water bodies. The water in the crocodile breeding pond (1) can be changed by water pumped from the water purification pond (2) instead of external water sources, to achieve the purpose of water change. The meat of the bred crocodile is delicious, slight-sweet and tasty, conforms to the quarantine standards and the food hygiene and safety standards, meets the requirements for international pollution-free foods, and is a completely green food. Besides, the crocodiles grow fast, the yield is increased, and the economic benefit is improved.

The invention discloses a method for breeding Medicago sativa L. male sterile line. The method is characterized by comprising the following steps of: performing interspecific distant hybridization on wild Medicago falcata L. from Xilin Gol grassland of Inner Mongolia which is used as female parents purple alfalfa from Jungar grassland of Inner Mongolia which is used as male parents; obtaining male sterile line Ms-4 from the offsprings; back crossing four male parents with the male sterile line Ms-4; performing cuttage propagation on the male sterile plants in each back cross offspring, and testing the combining ability of the agronomic traits for further selecting two excellent male sterile lines of the Medicago sativa L. with high combining ability and high volume of production from the male sterile plants, wherein the two excellent male sterile lines are named Ms-4-1 and Ms-4-2. The sterile lines obtained by the method have high combining ability, excellent fertility, high male infertility rate up to 100% and stable heredity.

The present invention relates to a method for external regeneration and propagation method of pistia stratiotes. Said method includes the following steps: selecting pistia stratiotes stem, cleaning and disinfecting it to obtain sterile explant; cutting its stem into slices, then placing the slice on the MS culture medium containing plant hormone 2,4-D and BA, inducing to form callus; then transferring said callus onto the MS culture medium containing plant hormone BA to make regeneration and obtain seedling, further rooting so as to obtain whole regenerated plant, then transferring the regenerated plant onto SH liquid culture medium to make extensive propagation.

The invention provides a combination removal apparatus of water lettuce to improve water lettuce removal efficiency. The combination removal apparatus of water lettuce comprises a floater and a waterlettuce clearing comb fixed to a rotary shaft; the rear end of the rotary shaft is provided with a water lettuce removal comb; the height of the water lettuce removal comb decreases gradually from front to rear; the floater is provided with a water lettuce chopping device at the rear end of the water lettuce removal comb; the water lettuce chopping device includes a housing in horizontal barrel shape; one end of the housing is opened, the other end of the housing is closed, the top of the closed end of the housing is provided with a feed port, a pushing spindle horizontally arranged is mountedin the housing and is provided with a spiral vane, the open end of the housing is fitted with a cutter spindle, the end of the cutter spindle is provided with a cutting plate in circular shape, and the cutting plate is provided with a plurality of elongated through channels in radial form; the cutter spindle is lower than the pushing spindle and is connected with the same through gear fitting, sothat the cutter spindle is driven by the pushing spindle to reversely and synchronously rotate with the pushing spindle.

The invention relates to the technical field of pest prevention and control, particularly relates to a medicine for preventing and controlling water lettuce, and also relates to a preparation method and an application method thereof. An efficient environment-friendly water lettuce prevention and control medicine consists of the following components in percentage by weight: 30-40% of N-(3,4-dichlorophenyl)-N',N'-dimethylurea, 25-35% of N-(phosphonomethyl) glycine, 20-30% of aluminum potassium sulfate dodecahydrate, 0.2-5% of nonionic surfactant and 0.2-5% of vegetable oil. Through the invention, an effect of upper control and lower curing can be realized; 24 days later, the leaves and root tips of the water lettuce thoroughly die and are dissolved, the death rate reaches 100%, and regeneration is avoided; and moreover, the medicine is nontoxic and harmless and environment-free, and prevents influence on the organisms of water bodies (aquatic fish and poultry) as well as secondary pollution.

The invention relates to a technical formula of an ecological layer feed. The ecological layer feed is characterized by comprising the following components by weight percent: 30-55% of corn powder, 25-50% of soybean meal, 3-10% of bentonite, 5-14% of water lettuce powder, 4-8% of shell powder, 3-8% of gunk, 5-12% of mountain flour, 3-5% of vitamin, 0.4-0.6% of microelements, 2-4% of soya-bean oil, 0.4-0.6% of selenium yeast, 0.2-0.5% of zinc glycinate, and 1-3% of salt. By adopting the technical formula of the ecological layer feed, the health of a layer is ensured; the tolerance of the layer is avoided; the production property of the layer is improved; the quality of an egg is also improved.

The invention provides traditional Chinese medicine for treating cervical cancer and a preparation method. Raw herbal materials of the traditional Chinese medicine comprise gynura bicolor, pistia stratiotes, edgeworthia chrysantha, hylocereus undatus, timothy grass, argemone mexicana, artemisia sphaerocephala, tamarix chinensis, tropic ageratum herbs, alder bark, corydalis balansae, manchurian beakgrain, oyster plants, licorice sections, roxburgh roses, franchet peashrub flower roots, pungent litse root bark and sassafras tzumu. The traditional Chinese medicine has the advantages that the exact curative effect on the cervical cancer is achieved, toxic and side effects are few, relapsing is not prone to occurring, and the survival time of cervical cancer patients can be significantly prolonged.

The invention discloses a method for extracting and preparing a protease from water lettuce roots. The method comprises the following steps of: mincing and homogenating fresh water lettuce roots and extracting by using water or a phosphate buffer solution; precipitating the extract by using an organic solvent and separating the protease, and then drying the protease, thereby obtaining high-activity protease powder. The method disclosed by the invention is used for producing high-activity protease from water lettuce; and therefore, the method is capable of changing wastes into things of value, energy-saving and environment-friendly, simple to operate, low in product production cost and convenient for large-scale production.

The invention relates to a method for synthesizing a biological agent capable of enriching heavy metal cadmium in a rice field and belongs to the technical field of ecological remediation of heavy metal polluted soil. The biological agent provided by the invention is injected into roots of water lettuces to promote the enriching effect of the roots of the water lettuces to micro pollutant heavy metal cadmium, the pollution caused by cadmium in the rice field is effectively controlled with the quick reproduction of the water lettuces and the harm caused to human bodies by heavy metal cadmium enriched by rice in the soil is avoided. According to feedback of research and example results, the biological agent can finally enable the enrichment factor of cadmium in the water lettuces to reach more than 10000 and the removal rate of cadmium to highly reach more than 99.6 percent at the same time.

The invention discloses a preparation method of paper with a stable structure for a knitting technology. The method comprises the steps of raw material preparation, raw material treatment, primary pulp preparation, mixed pulp preparation and papermaking. Compared with the prior art, the preparation method of the paper with the stable structure for the knitting technology has the following advantages that an ailanthus bark decocting solution is used for accelerating beating of fibers in water lettuce and cotton stalks, therefore, the short fiber content is increased, and mechanical damage is reduced; meanwhile, waxy corn pulp can permeate into fiber holes in the treatment process to be combined with fibers, and the tenacity of the fibers can be effectively improved; waterproofness of the product is improved by means of the synergistic effect of carboxyl acrylic resin and other raw materials; in the product preparation process, the use rate of the raw materials is high, and the obtained product has high strength and tenacity, is easy to knit, stable in structure, high in weather resistance and not prone to mildewing.

The invention relates to a synthetic method for a biological preparation capable of enriching the content of heavy metal mercury in a paddy field, belonging to the technical field of ecological restoration of heavy metal contaminated soil. The biological preparation provided by the invention is injected into water lettuce roots, so enrichment of micropollution heavy metal mercury in the water lettuce roots is promoted; with rapid proliferation of the water lettuce, mercury pollution in the soil of the paddy field is effectively controlled; thus, hazards to human body due to enrichment of the heavy metal mercury in the soil of the paddy field are avoided. According to feedback of research and example results, with the biological preparation in the invention, enrichment factors of the mercury in the water lettuce can ultimately reach more than 12000; meanwhile, removal rate of the mercury reaches up to more than 99.7%.

The invention discloses a method for manually pollinating sweetsop. The method comprises the following steps: (1) picking mature blooming or bloomed flowers at the same day of pollinating, putting onto a paper sheet and airing, removing petals, pistils and pedicels after releasing pollens and storing the pollens of stamens and the anthers in a pollinating container; and (2) holding the pollinating container filled with the pollens of stamens and the anthers by one hand, fixing the receptacle part of to-be-pollinated slightly booming or half booming flowers, removing three petals one by one by the other hand, exposing pistil caps, transferring the pollinating container filled with the pollens, upward jacking the pistil caps, fully contacting the pistil caps with the pollens of stamens in the pollinating container, repeatedly dipping for 2-3 times and confirming the pistil caps stained with the pollens. According to the invention, the pollinating container is utilized to pollinate, the method is convenient, quick, low-cost and high in success rate of pollinating, the complex pollinating operation is reduced and the pollinating efficiency is greatly increased.

The invention discloses a method for chemically preventing and removing water hyacinths and pistia stratiotes.The method is completed through the first step of pretreatment, the second step of pesticide application and the third step of a check test.The method has the advantages that mesotrione can effectively prevent and treat field broad-leaved weeds and can also prevent and treat two vicious aquatic weeds, namely, the water hyacinths and the pistia stratiotes fast and effectively; a body and metabolin of the pesticide both belong to low-toxicity substances, degradation in water is fast, the activity of aquatic organisms and drinking water safety are not affected, and the aims of safe and efficient prevention and treatment with time and labor saved are achieved.

The invention belongs to the technical field of medicine and pharmacology, and particularly relates to a medicinal preparation used for treating allergic medicamentosus stomatitis. The medicinal preparation is prepared from lycogala epidendrum, kochia shoots, albizia chinensis, dry sandalwood, pratia nummularia roots, hungaian morning glory roots, trapa incisa, golden sealavender flowers, apricotleaf ladybell roots, shallots, herba glechomae, garcinia xanthochymus, grass-leaved eria, tritonia crocata, pistia stratiotes, pyrola, huanggaoben, Chinese sericocalyx herbs, fissistigma bracteolatum, bean curd crust, pilea martini, grenateleaf hetreopappus herbs, angled bittersweet roots, manyflower jasmine herb flowers, lysozyme chloride, zinc hyaluronate, limonene, sorbitol, sodium alginate, vitamin C, polyvinyl alcohol, N-dodecyl sarcosinate sodium and accessories. Through the multiple Chinese herbs with reasonable compatibility and Western medicine ingredients with a regulating effect, the medicinal preparation has the effects of removing swelling, relieving pain, diminishing inflammation and achieving the antibacterial effect, also has the effects of promoting salivation, inducing diuresis and removing toxicity, promotes sensitinogen discharge, helps congestive or oedematous or anabrotic or oozy skin tissue to recover rapidly, is free of side effects and has high universality.

The invention discloses a preparation method of paper with a stable structure for a knitting technology. The method comprises the steps of raw material preparation, raw material treatment, primary pulp preparation, mixed pulp preparation and papermaking. Compared with the prior art, the preparation method of the paper with the stable structure for the knitting technology has the following advantages that an ailanthus bark decocting solution is used for accelerating beating of fibers in water lettuce and cotton stalks, therefore, the short fiber content is increased, and mechanical damage is reduced; meanwhile, waxy corn pulp can permeate into fiber holes in the treatment process to be combined with fibers, and the tenacity of the fibers can be effectively improved; waterproofness of the product is improved by means of the synergistic effect of carboxyl acrylic resin and other raw materials; in the product preparation process, the use rate of the raw materials is high, and the obtained product has high strength and tenacity, is easy to knit, stable in structure, high in weather resistance and not prone to mildewing.

The invention discloses a method and a system for predicting water lettuce invasion distribution areas, and the method comprises the steps: carrying out the RDA analysis of the obtained information ofa water lettuce disaster occurrence point and an environment variable set of the water lettuce disaster occurrence point, and obtaining a non-redundancy environment variable set related to the growthof water lettuce; processing the non-redundant environment variable set by adopting a WOE method to obtain an influence weight of each environment variable in the non-redundant environment variable set on the water lettuce; and performing influence weight summation on all the environment variables in the prediction area to obtain a water lettuce habitat adaptability index of the prediction area.According to the method, the collinearity problem of environmental variables such as terrain, weather, sewage discharge and social and economic development conditions of the water lettuce invasion disaster area Sobs can be solved, the water lettuce invasion possibility of a larger area Spre can be predicted on the basis of the environmental variables, and the invasion possibility of the whole areacan be visually reflected.

The invention provides a method for increasing the cross compatibility and the seed setting rate of tobacco and N.alata, and belongs to the technical field of agricultural biology. The method includes the steps of starting hanging female parent flowers, wherein the hanging time is the flowering start time, and the 72nd hour, the 96th hour and the 120th hour after hanging are the aging stages after the flowering start time; pollinating female parent stigmas with male parent mature pollen during the three time periods, conducting sampling 48 hours after pollination, counting the number of pollen tubes and the seed setting rate through callose fluorescence, and comparing influences of pollination on the cross compatibility; selecting flowers, at the flowering start time, of female parents, stripping pistils, clipping stigmas which are smashed into powder after being naturally aired indoors, and mixing the male parent mature pollen with sigma powder according to the weight ratio between 1 to 5 and 1 to 50; pollinating the flowers with mixed pollen 120 hours after the flowering start time of the female parents, conducting sampling 48 hours after pollination, counting the number of pollen tubes and the seed setting rate through callose fluorescence, and comparing influences of pollination on the cross compatibility; cultivating tobacco as the female parents, and planting N.alata as the male parents. The method has the advantages that operation is simple, cost is low, popularization is easy, and reference is provided for obtaining of plant inter-species coeno-species.

The invention provides pork pig quality improvement feed. The pork pig quality improvement feed for pork pigs aged in days of 90-160 is made by mixing a basic material and an adjustment material, wherein the adjustment material accounts for 13-20% of the total weight of the feed. The basic material is made of, by weight, 30-40 parts of rice, 25-30 parts of corns, 20-25 parts of wheat bran, 10-15 parts of fish meal, 10-13 parts of shrimp shells, 15-18 parts of potatoes, 10-13 parts of sweet potato leaves, 9-12 parts of folium artemisiae argyi, 8-13 parts of bone meal, 10-14 parts of broom corn millet, 11-15 parts of buckwheat, 7-9 parts of cow peas, 6-10 parts of broad beans, 3-6 parts of ipomoea aquatic, 4-7 parts of camellia and 2-5 parts of water lettuces. The pork pig quality improvement feed has the advantages that a feed manufacturing process is simple; since the feed is made of pure natural crops and Chinese herbal medicines and free of color additives and hormone drugs, pork pigs fed with the feed have the advantages of high quality, meat toughness and less fatty deposits.

The invention relates to float lotus viscosity reductant and production method, belonging to petroleum field. The comprised components and weight proportion are as follows: biochemical float lotus fermentation liquor 20 -65%, surface active agent 5- 25%, liquid organic silicon 2- 15%, mixing for emulsification. The invention is characterized by good viscosity reduction effect, stable performance, almost no coagulation during transportation and storage process, no dewatering phenomenon, reduced refining cost, avoidance of large amount of organic matter utilization, and high economic and social benefit.

The invention discloses quick-preparation type plant alkaloid insecticidal powder for peach trees and a preparation method of the quick-preparation type plant alkaloid insecticidal powder. the plant alkaloid insecticidal powder is prepared from the following components in parts by weight: 4.534-8.655 parts of 1,2-dicarboxy-propyl carborane, 3.982-9.376 parts of N-bromosuccinimide, 9.456-14.269 parts of cod-liver oil extracts, 4.257-8.657 parts of methyl methacrylate, 1.354-4.156 parts of biscyclopentadienyl iron, 5.698-7.156 parts of acetic p-toluenesulfonic anhydride, 4.598-7.325 parts of divinyltetramethyldisiloxane, 18.657-20.723 parts of alliin, 10.687-15.893 parts of divinyltetramethyldisiloxane, 12.586-17.951 parts of calla extract liquor, 7.635-12.675 parts of methyl trifluoromethanesulfonate, 1.589-7.896 parts of N, N-dimethylformamide, 10.893-16.753 parts of 2-oxo-1-imidazolidinecarbonyl chloride, 8.394-12.756 parts of 3-acetyl-1-chlorocarbonyl-2-imidazolidone, 14.659-18.546 parts of 3-chlorocarbonyl-1-methanesulfonyl-2-imidazolidinone, 4.893-8.885 parts of 1-(2-hydroxyethyl)-2-imidazolidinone, 6.786-10.563 parts of 1-methylsulphonyl-2-imidazolidone, 15.689-22.486 parts of 1,3-dimethyl-2-imidazolidinone, 17.986-22.258 parts of 1-acetyl-2-imidazolidinone and the like and 5.698-8.467 parts of pistia stratiotes extract liquor.

The invention discloses a novel three-dimensional cultivation method of geese, fishes and mussels, and belongs to the field of cultivation. The method comprises the following steps of building base facilities: selecting a pond with good water quality, a sufficient water source and transportation convenience; performing three-dimensional cultivation: raising 65 to 90 goslings in per mu of water surface, and enabling the fishes and the mussels to grow in a water body, wherein the stocking quantity of the fishes is about 50 kg per mu; before fingerlings are put into the pond, performing immersionbath on fingerling bodies for 6 to 8 minutes by a 3-percent saline solution; meanwhile, injecting hemorrhagic disease vaccines on the fishes; hanging and culturing 100 cages of pearl mussels per mu;and performing raising management: reasonably matching feed, performing regular and quantitative feeding without feeding mildew feed, and regularly fishing water lettuces, water hyacinths, water peanuts and wheats to feed the geese. The novel three-dimensional cultivation method has the advantages that by using a mode of adding goose raising in a fish and mussel mixed cultivation pond, through production configuration of three-dimensional cultivation, pond water areas and feed resources are fully utilized; the geese, the fishes and the mussels achieve symbiotic and mutually benefitting effects; the production value is high; and the cultivation method is scientific and reasonable.

The invention discloses feed prepared from hydrophyta natantia. The feed is prepared from, by weight, 35-45 parts of corn, 20-30 parts of hydrophyta natantia powder, 5-10 parts of bean pulp, 5-10 parts of protein powder, 5-10 parts of pepper meal, 1-2 parts of calcium powder, 1-2 parts of microelements, 5-10 parts of dried blood, 2-4 parts of modified starch and 2-5 parts of lipase, and the hydrophyta natantia powder is any one or more of lotuses, calami, scirpus tabernaemontani, cattail, reed, water lilies, royal water lilies, water chestnuts, nymphoides peltatum, hydrilla, hornwort, eel grass, water caltrop, myriophyllum spicatum, water hyacinth, pistia stratiotes, hydrocharis, azoila imbricate, salvinia molesta, lemna minor, duckweed, water cabbages, eichhornia crassipes and lemna minor. The feed is simple in matching and convenient to use, the hydrophyta natantia is used for replacing part of grain raw materials (mainly beans are replaced and the use amount of the corn is reduced), and the cost of the feed is greatly reduced.

The invention discloses a bean-saving chicken feed which comprises the following components in parts by weight: 35-45 parts of corn, 20-30 parts of hydrophyte natantia powder, 5-10 parts of bean pulp, 5-10 parts of Leguminosae straw powder, 5-10 parts of malt, 1-2 parts of multivitamin, 1-2 parts of microelement, 5-10 parts of blood powder, 2-4 parts of edible oil and 2-5 parts of animal viscera. The hydrophyte natantia powder comprises any one or more of lotus, calamus, Scirpus tabernaemontani, cattail, reed, pond lily, royal waterplatter, water chestnut, Nymphoides peltatum, hydrilla, hornwort, Vallisneria spiralis, curly pondweed, watermilfoil, common waaterrthacinth, Pistia stratiote Linn, Hydrocharis morsus-ranae, water fern, salvinia, water fern, Lemna duckweed, duckweed, Pistia stratiotes, Eichhornia crassipes and Lemna minor. The feed is simple in proportioning and convenient to use, and substitutes part of grain raw materials (mainly substitutes beans, and lowers the consumption of corn) with the hydrophyte natantia, thereby greatly lowering the cost of the feed.

Methods for treating substrates, including the skin and hair, by contacting the substrate with an extract of the Pistia Stratiotes plant are described, along with skin-care and hair-care compositions containing such extracts and processes for preparing such extracts.

The invention relates to a culture method of an aquatic plant in low-concentration phosphorous enriched slightly-polluted water, and belongs to the field of sewage treatment. The method comprises the following steps: culturing a batch of water lettuces in a pollution-free pond; removing the outside leaves until 3 to 4 leaves are remained; sterilizing; transferring into a 5L glass tank in which deionized water is contained; irradiating with a 40w fluorescent lamp under room temperature; adding sodium dihydrogen phosphate, agar, glucose, sodium chloride and magnesium sulfate to the deionized water in the glass tank; removing any new leaves of the water lettuces; transferring into another 5L glass tank in which the deionized water is contained; irradiating with the 40w fluorescent lamp under room temperature; transferring into the previous glass tank after irradiating for a certain time; respectively adding certain number of sodium dihydrogen phosphate, agar, glucose, sodium chloride and magnesium sulfate; culturing for 30 days to obtain phosphorous-enriched concentration factors of the water lettuces. According to the culture method, the sewage can be purified, and eutrophication of water mass can be treated.

The invention discloses a post-harvesting treatment and forcing culture method for seed bulbs of tulipa gesneriana. The method comprises the following steps of 1, harvesting the seed bulbs of the tulipa gesneriana and preliminarily treating the seed bulbs; 2, putting the seed bulbs of the tulipa gesneriana in an environment with the temperature of 20-25 DEG C and the air humidity of 60-70% for post-harvesting treatment, and observing the flower bud differentiation situation until differentiation of pistils is finished; 3, conducting cold treatment on the seed bulbs under the condition of 3-8 DEG C for 3-12 weeks; 4, stripping bulbus skin at bulbus roots of the seed bulbs, then planting the seed bulbs in culture soil or culture liquid, and conducting shading culture for 4-6 days in an environment of 10-15 DEG C; 5, putting seedlings of the tulipa gesneriana in an environment of 20-25 DEG C for culture, and conducting seedling-stage growth and flower forcing under the lighting conditionof 16 hours of lighting treatment and 8 hours of dark treatment every day. By means of the method, two growth stages of post-harvesting treatment and forcing culture of the seed bulbs of the tulipa gesneriana are integrated, and the method is suitable for out-of-season cultivation, significantly shortens the growth period of the tulipa gesneriana, and increases the utilization rate and economic benefit of the seed bulbs of the tulipa gesneriana.

The invention discloses a health medicine liquid used in a blowing comb. The blowing comb comprises a comb handle, a comb head and a power supply connecting line, the comb head has a comb head inner cavity, the comb head inner cavity is filled with a liquid absorption cotton, one side of the comb head is provided with a plurality of comb teeth, and one end of the comb head is also provided with a far infrared lamp; the comb handle inner cavity is sequentially provided with an electric heating piece, a negative ion generator and a miniature blower; and the medicine liquid is injected the liquid absorption cotton, and the medicine liquid is prepared from, by weight, 5 parts of Sagittaria trifolia L., 5 parts of water lettuce, 10 parts of Herba Violae, 15 parts of Evodia lepta, 5 parts of Root of Perny Holly, 3 parts of Nasturtium montanum Wall., 3 parts of root of Cudrania cochinchinensis Kudo et Masam, 5 parts of amur grape, 8 parts of Physalis alkekengi, 6 parts of Fructus Citri Sarcodactylis, 8 parts of Cayratia japonica, 6 parts of Justicia procumbens linn., 8 parts of Shorttube Lycoris, 8 parts of Celastrus orbiculatus Thunb., 5 parts of Black Nightshade, 8 parts of Caulis Trachelospermi, 5 parts of and 8 parts of Chinese fevervine herb. The health medicine liquid has an aided treatment effect on seborrheic dermatitis on scalps.

Lettuce flowers belong to a panicle, each inflorescence contains 10-20 small flowers, the small flowers are yellow, a pistil is wrapped with a ligulate corolla and a tubular stamen, the lettuce flowers cannot be emasculated in the bud stage, and only can be emasculated in the flowering stage, and the flowering stage of the lettuce is short, so the hybridization of lettuce is very difficult. People's demand for lettuce is growing with the development of the society, so the breeding of a new variety becomes more and more important. An optimized lettuce hybridization method is constructed in theinvention to obtain a high lettuce hybridization rate and lay a foundation for subsequent lettuce hybridization.