53 results about "Potamogeton crispus" patented technology

The invention provides a method for recovery of submerged plant communities through submerged vegetation turf. The composite submerged vegetation turf is made and is transferred and implanted into ecological systems such as a river and a lake to be recovered. Young seedlings of submerged plants are cultivated in a paddling pool through a plant fiber blanket, the young seedlings are fast cultivated through submerged plant seeds, winter buds, broken branches and other propagules, two submerged plants are planted on each piece of turf, three types of turf of elodea nuttallii and potamogeton crispus, vallisneria spirals and hydrilla varticillata, and potamogeton maackianus and hydrilla varticillata are cultivated, the cultivated young seedlings and the plant fiber blanket are taken out of the pool in pieces during transplantation, the turf is formed, rolled into cylinders and transported to a target water region, and then the turf is placed at the bottom of water piece by piece and fixed through T-shaped fixing stickers. The method has the following advantages that the illumination, water depth and the nutrient conditions of the paddling pool can be controlled easily, the submerged plant turf is conveniently transported and planted on site, and on-site plant planting time is saved.

The invention relates to a method for preparing water-retention fertilizer from aquatic plants, comprising the followings steps: using aquatic plants of water hyacinth, Potamogeton crispus L, and alternanthera philoxeroides as raw materials, using haloacetic acid and potassium salt thereof or carbon disulfide in alkaline solution containing potassium ion as chemical modifier, and using FeCl3 or AlCl3 as cross-linking agent so as to obtain aquatic plant fiber with water absorption and water retention property. In the invention, a large amount of aquatic plant fiber generated by ecosystem restoration of water and pollution prevention engineering is used so as to ensure long time operation of ecosystem restoration engineering. The water-retention fertilizer prepared by the invention can regulate water in soil, supply potassium fertilizer and nitrogen fertilizer in soil after applying since containing the potassium ion, ammonia water, and urea. The natural aquatic plant fiber is used as basis material to prepare water-retention fertilizer which can be completely biodegraded, can improve soil structure and can prevent hardening of tilled land.

The invention discloses an application of potamogeton crispus fermentation liquor to improving the capability of denitrification for sewage treatment. The potamogeton crispus fermentation liquor is prepared by draining off and grinding potamogeton crispus after collecting potamogeton crispus, then putting ground potamogeton crispus in a fermentation tank to be mixed with naturalized activated sludge, then adding water, carrying out constant temperature fermentation, and removing potamogeton crispus residues through filtration. The invention also discloses an application of potamogeton crispus fermentation liquor to improving the capability of denitrification for sewage treatment. The method has the advantages of simplicity in operation, cheap and easily obtained raw materials, good denitrification effects and the like, and has important social, economic and ecological benefits.

The invention discloses an application of potamogeton crispus fermentation liquor to constructed wetland denitrification. The potamogeton crispus fermentation liquor is prepared by draining off and grinding potamogeton crispus after collecting potamogeton crispus, then putting ground potamogeton crispus in a fermentation tank to be mixed with naturalized fermentation sludge, then adding water, carrying out constant temperature fermentation, and removing potamogeton crispus residues. The invention also discloses an application of potamogeton crispus fermentation liquor to constructed wetland denitrification. The method has the advantages of simplicity in operation, cheap and easily obtained raw materials, good denitrification effects and the like, and has important social, economic and ecological benefits.

The method for rapid propagation of potamogeton crispus seedlings includes the following steps: firstly, collecting potamogeton crispus plant from natural water body or greenhouse, making pretreatment and cleaning its surface, removing plant leaf and root, using the stem portion closed to top, sterilizing completely, cutting stem segment, placing the stem segment on the solid culure medium containing hormone to induce budding, transferring the bud with a certain length to propagation culture medium to make amplification culture, then making rooting culture and seedling naturalization, then planting the seedling in natural water body.

The invention discloses an apple seed-containing piglet fattening fertilizer and a production method thereof. The apple seed-containing piglet fattening fertilizer comprises the following raw materials in parts by weight: 150-200 parts of corn bran, 200-300 parts of soybean cakes, 50-100 parts of grain brans, 100-150 parts of live pig blood, 0.5-1 part of leavening agent, 100-150 parts of apple seeds, 70-80 parts of wheat flour, 30-40 parts of seasame seed meal, 30-40 parts of shrimp meal, 20-30 parts of pine leaf powder, 0.5-1 part of herba leonuri, 1-2 parts of caulis spatholobi, 2-3 parts of cortex magnoliae officinalis, 2-3 parts of fructus rosae laevigatae, 30-40 parts of sorghum rice, 5-10 parts of mung beans, 3-4 parts of smoke plum pulp, 7-8 parts of rice koji, 5-10 parts of green peppers, 10-20 parts of ceratophyllum demersum, 5-15 parts of epipremnum aureum, 20-25 parts of potamogeton crispus, and 15-20 parts of phagostimulant. The feed is complete and abundant in nutrients, the appetite of piglets is high, piglets fast grow, and are strong and incapable of suffering from disease and diarrhoea, the fatting period of the piglets is short, the fattening efficiency is high, and the meat is firm and the taste is delicious.

The invention relates to the technology field of plant tissue culture, wherein potamogeton crispus turions tissue culture and rapid multiplication technology technique is employed for the mass production of high grade potamogeton crispus tissue culture sprouts, which has overcome the problem of different seed germination under natural conditions, thus meeting the need of recovering aquatic vegetation, developing herbivorous fishes, purifying water and introducing seeds into lakes and ponds.

The invention mainly relates to the field of cultivation and discloses a cotton breeding matrix. The cotton breeding matrix is prepared from cotton straws, corn stalks, wheat straws, biogas residues, sweet potato residues, Potamogeton crispus, cow dung, edible fungus wastes, EM bacteria, traditional Chinese medicines, clonidine, rose flower extract, river sand, vermiculite and medical stone. The cotton breeding matrix is prepared from abundant raw materials, has balanced nutrition, can provide the necessary nutrients for cotton growth, has antibacterial and insecticidal effects, enhances the disease resistance of cotton, and realizes an emergence rate of cotton of 89%, a survival rate of 94%, a disease and pest rate of 4% and economic efficiency of 9.6%. Cotton straw as a raw material is fully used and application approaches of clonidine and rose flower extract are increased. Through strain culture fermentation and use of medical stone rich in small molecule beneficial ingredients, the growth of cotton is promoted, a planting period is shortened by 15 to 20 days and planting efficiency is accelerated. Through cooperation of medical stone and a variety of Chinese herbal medicines, the cotton breeding matrix inhibits occurrence of pests and diseases, reduces an incidence rate of pests and diseases and saves a planting cost.

The invention discloses a combined constructed wetland system capable of stably treating domestic sewage all year around and an operating method. The system comprises an emerging plant wetland, a submerged plant wetland and a sewage pump, wherein the emerging plant wetland and the submerged plant wetland are combined; valves are arranged at the combined position; the sewage pump is arranged in the submerged plant wetland, and leading water in the submerged plant wetland to the emerging plant wetland in summer; the system is operated in a continuous water inlet and plug-flow water outlet manner. Such thermophilic emerging plants as reeds and cattails and such psychrophilic submerged plants as potamogeton crispus and elodea nuttallii, namely two types of seasonal plants, are matched and combined to achieve complementation in the system, so as to effectively overcome the defects that the carbon-nitrogen ratio of the sewage in summer is low and the seasonal effect on the conventional surface flow constructed wetland is great.

The invention discloses a breeding method in paddy field lobster farming crop rotation 2+1 modes. The breeding method includes steps of S1, digging annular ditches in paddy fields in early spring, applying fertilizers, planting potamogeton crispus and elodea nuttallii and improving the water quality; S2, removing weeds for the potamogeton crispus and the elodea nuttallii when the temperature is gradually increased in March, and placing lobster seeds in the paddy fields in the middle ten days and the last ten days of March under the conditions of the stocking sizes of 200-300 lobster seeds / kilogram and the stocking density of 4000-6000 lobsters / mu; S3, breeding the lobster seeds for the breeding time of 20-25 days and capturing lobsters in the middle ten days of April; S4, carrying out disinfection, bottom modification and detoxification on the paddy fields after the lobsters are completely captured. The breeding method has the advantages that the large-scale lobster yield can reach 150-200 kilograms / mu, is double the traditional 1+1 paddy and lobster crop rotation yield and is higher than the yield of paddy and lobster symbiotic modes; first batches of lobsters appear on the marketin April and can be sold at a high price of 40-60 yuan / kilogram, and the lobsters are bred at the low density, are high in survival rate and have high benefits.

The invention relates to the technical field of aquatic product culture, and particularly relates to a method for culturing penaeus vannamei in a rice field. The method of the invention including thefollowing steps of: treating the rice field by using horseradish and hydrogen peroxide; planting water grass in the deep part of the rice field, inoculating oocystis borgei, nannochloris oculata and chlorella pyrenoidosa, and dispersively planting radix arnebiae and potamogeton crispus in the rice field; changing water at regular time, and adding decomposed farmyard manure with composite microbialagent prepared by compounding bifidus, pichia pastoris, enterococcus faecium, bacillus licheniformis and bacillus natto; applying a mixed Chinese herbal medicine supplement prepared by crushing horseradish, herba artemisiae scopariae, herba leonuri, flos lonicerae, rhizoma belamcandae, and herba artemisiae scopariae periodically to water. According to the method, farmyard manure, probiotics and Chinese herbal medicines are used, natural plants are planted, the whole process is green and harmless, the quality of shrimp meat is kept at a higher level, the comprehensive economic benefits of whole culture are kept at a higher level, and the economic benefits are greatly improved.

The invention relates to a method for inducing radical buds to propagate potamogeton crispus L by using hormones, belonging to the biotechnology field. Roots are promoted to grow by using naphthylacetic acid and buds are promoted to grow by using 6-benzylaminopurine so as to improve cutting survival rate. The operation steps are as follows: (1), collecting stem sections for propagating; (2), preparing and processing stem sections processing drug; and (3), cutting stem sections and managing seedling fields. Compared with winter bud propagation and tissue culture propagation, the method provided in the invention has the advantages of simple operation, low culture condition demands, low investment cost, short propagation period and the like; the potamogeton crispus L propagation cost is greatly reduced; and the method meets the demand that a great number of potamogeton crispus L is needed when recovering aquatic vegetation.

The invention discloses a laying sea duck supplement feed being rich in selenium and astaxanthin, which is prepared from the raw materials including, by weight, 35-45 parts of selenium-rich paddy rice straw powder, 27-33 parts of selenium-rich rice bran powder, 0.5-1.5 parts of calcined oyster shell powder, 1.5-2.5 parts of residue powder of shrimps and crabs, 1.5-2.5 parts of selenium-rich peanut shell powder, 1.2-1.8 parts of selenium-rich garlic, 1.5-2.5 parts of laminaria japonica, 0.5-1.5 parts of undaria pinnatifida, 0.5-1.5 parts of porphyra, 1.5-2.5 parts of purslane, 0.5-1.5 parts of artemisia argyi, 2.5-3.5 parts of shepherd's purse, 2.5-3.5 parts of potamogeton crispus, 1.5-2.5 parts of seaweed powder, 2.5-3.5 parts of fruits and peels of mangrove, 2-4 parts of earthworm powder, 0.4-0.6 parts of calcium hydrogen phosphate, 0.02-0.04 parts of lysine, 0.03-0.05 parts of threonine, 0.15-0.25 parts of yeast selenium, 1.5-2.5 parts of astragalus polysaccharide and 0.4-0.6 parts of salt.

The invention discloses an in situ remediation method for improving black and odorous river sediment by combining submerged plants and improving agents. The method includes the following steps: putting a sediment improving agent in the sediment of a river, and planting submerged plants in the sediment on the 0th - 20th day when the sediment improving agent is put, wherein 1.5-2 kg of the sedimentimproving agent can be put into the sediment per square meter, and the submerged plants are one or more of potamogeton crispus, ceratophyllum demersum and myriophyllum verticillatum; harvesting the submerged plants when the heights of the submerged plants arrive the water surface of the river so that the tops of the submerged plants can be located 25-35 cm below the water surface; and repeating the step 3 until the color of the sediment is changed from dark brown to brown-yellow. The method combines a chemical remediation technology and a bioremediation technology, so that the deficiency of the chemical remediation technology and the bioremediation technology can be made up by integrating the advantages of the two. Black and odorous rivers can rapidly improve the oxygen environments of thesediment by adding the sediment improving agent, so that favorable conditions can be created for the planting of the submerged plants.

The invention discloses a breeding method for promoting turtle growth. The breeding method comprises the following steps of S1, preparation before breeding, wherein a pond of 4-6 mu is selected as a breeding pond, and potamogeton crispus and waterweed are planted at the bottom of the breeding pond after disinfection treatment; S2, disinfection putting, wherein penaeus monodon, fish fry, escargots and little turtle are put into the breeding pond after disinfection; S3, feed putting and daily management, wherein feed is fed twice at a fixed point every day, and fishing is conducted after feeding is conducted for 28-30 months; in the breeding process, the water body change is observed every day, water is replaced timely, oxygenation is conducted for 2-4 hours every day in summer, and disease prevention is conducted once every half a month. Through the method of combining stocking and artificial breeding, the water body resource is made full use of, the turtle is excellent in meat quality, good in condition and fast in weight increasement, the come-out time of turtles is shortened, fishes and shrimps can be harvested simultaneously, and the overall economic efficiency of turtle breeding is increased.

The invention provides a lamb breeding granulated feed and a preparation method thereof. The granulated feed comprises the following raw materials in parts by weight: 15-30 parts of silage alfalfa, 40-50 parts of corn, 7-10 parts of peanut meal, 10-15 parts of bran, 10-20 parts of silage corn, 5-10 parts of rosa roxburghii tratt fruit residue ferment powder, 3-6 parts of potamogeton crispus powder, 0.1-0.3 part of naringin, 0.2-0.5 part of composite vitamins, 0.2-0.5 part of composite amino acids and 1-1.5 parts of table salt. The preparation method disclosed by the invention is simple, and the prepared breeding granulated feed is comprehensive in nutrients, good in palatability and high in feed conversion rate; and besides, the immunity of the organisms of lambs can be effectively enhanced, the digestive function of intestinal tract of the lambs can be effectively enhanced, the attack rate is obviously reduced, and the daily growth rate of the body weight of the lambs can be obviously increased.

The present invention adopts the following processes: cleaning king lotus offspring root of silt; using submerged plants of hydrilla verticillata and potamogeton crispus, etc. as fresh-keeping and isolating material; storing the king lotus offsprings in layers and transporting, and transplanting so as to implement transplantation and introduction of king lotus offspring, its survival rate is up to above 95%.

The invention provides an ecological culture method capable of controlling picornvirus diseases in river crab culture. The ecological culture method comprises the following steps: I. pretreating a culture pond: adjusting the pH value of the sediment in the pond with quick lime, and exposing the bottom of the pond to the sun; II. determining the stocking variety and quantity in the river crab culture pond: stocking river crabs, intercropping freshwater shrimps and inter-culturing mandarin fish in the river crab culture pond; III. cultivating waterweeds in the river crab culture pond, including potamogeton crispus, potamogeton maackianus, ceratophyllum demersum, hydrilla verticillata, vallisneria natans, waterweeds, water chestnuts and nymphaea tetragona; IV. transplanting shellfish in the river crab culture pond, wherein the variety of the transplanted shellfish includes snails, clams, corbicula and other fresh and live shellfish; and V. using a biological agent in the river crab culture pond, wherein effective microorganisms (EM) mainly formed by bacilli, acetic acid bacteria, bifidobacterium, actinomycetes, photosynthetic bacteria, lactobacilli, saccharomycetes, and the like are mainly used. High-quality river crab culture ecological water areas can be provided by adopting the method, so that the river crab survival rate is high and high-quality and high-grade river crabs can be cultured. The method is capable of effectively preventing picornvirus diseases in river crab culture.

The invention relates to an animal and plant environmental-friendly freshwater fish bait and a preparation method thereof, and belongs to the technical field of fish feeds. According to the animal andplant environmental-friendly freshwater fish bait disclosed by the invention, a compounded perfume is compounded for breeding fly maggots, so that the attraction of the meat quality of the fly maggots to fishes is improved, and neighboring freshwater fishes are attracted to gather; a foaming agent is added, and after the animal and plant environmental-friendly freshwater fish bait enters water, the foaming agent is hydrolyzed to continuously produce carbon dioxide, so that the neighboring freshwater fishes are attracted to gather, and the lure of the fish bait is reinforced; potamogeton crispus and bitter herbs are utilized, grass foodstuffs which are loved by herbivorous fishes and meat foodstuffs which are loved by carnivorous fishes are compounded, raw materials are natural materials,no chemical additive is added, the using course is environmentally-friendly, and water body damage cannot be generated; the bait feed disclosed by the invention is packaged by casings, and the structure of each layer in the inner part is tightly combined, so that water soaking is slow, and when being soaked in water, the animal and plant environmental-friendly freshwater fish bait is not liable todissolve; and in water, the foaming agent is hydrolyzed to produce the carbon dioxide, and minute bubbles are formed and dispersed on the periphery of the bait, so that the bait can suspend in waterbodies and cannot sink, in the process of slow dissolving, the animal and plant environmental-friendly freshwater fish bait can continuously release food-calling components, and the fish gathering period is long.

The invention belongs to the technical field of sewage treatment and particularly relates to a water purifying agent and a preparation method thereof. The water purifying agent comprises Potamogeton crispus L. extract, wood vinegar, activated carbon and water. The preparation method includes: measuring out the crispus L. extract, the wood vinegar, the activated carbon and the water according to the proportion, placing into a stirrer, and evenly stirring to obtain the water purifying agent. The water purifying agent and the preparation method thereof have the advantages that the raw materials of the water purifying agent are raw materials which do not bring impurities after water treatment and can be removed by direct filtration, the wood vinegar is volatile and low in influence on subsequent procedures, and the color of the wood vinegar can be absorbed by the activated carbon.

The invention relates to a method for removing phenol materials from water by using aquatic plants and belongs to the field of water ecological treatment. The method comprises the following steps: selecting potamogeton crispus growing vigorously, cleaning, and removing silt and zooplankton and phytoplankton from the plants; selecting fresh, emerald green and well-grown materials for the test, continuously washing with tap water, and conveying into distilled water to perform domesticated cultivation; and planting the domesticated plants into phenol-containing water and cultivating to purify the phenol materials. By the method, the phenol-containing wastewater is treated by the aquatic plants. The method has the advantages of readily available materials, wide distribution, low cost, simplicity in operation, no secondary pollution and the like.

The invention discloses a spotted duck feed containing potamogeton crispus. The spotted duck feed containing the potamogeton crispus is characterized by comprising the following ingredients: potamogeton crispus, fishmeal, corn, wheat bran, snail mussels, bean meal, shrimp shell powder, flour, table salt and flaxseed oil. The potamogeton crispus is utilized as the main ingredient of the spotted duck feed; the special components from the lakes, including the snail mussels, the shrimp shell powder and the like, are compounded; the fishmeal and the bean meal are utilized as protein sources; the corns and the wheat bran are used for providing energy; the table salt and the flaxseed oil are used as additives; and the flour is used as an adhesive, so that the feed is comprehensive in nutrition. The feed is capable of ensuring rapid growth rates of the spotted ducks, and is high in feed conversion rate, small in waste, and little in pollution to the water qualities. The spotted ducks fed with the feed are high in egg yields; moreover, the produced duck eggs are red in the yolks and good in egg qualities.

The invention provides a shrimp and algae compound culture method which comprises the following steps: selection of a culture pond, treatment before culture, algae planting, prawn stocking and algae salvaging and multiple cropping. According to the shrimp and alga compound culture method, watermifoil and waterweed or potamogeton crispus, Potamogeton maackianus and other algae with complementary functions are planted in stages and layers, growth of prawns is facilitated, growth of the algae is easy to control, the advantage of mutual benefit and symbiosis of the prawns and the algae is promoted, and economic benefits are high.

The invention discloses an organic slow-release fertilizer special for corn. The organic slow-release fertilizer special for corn is prepared from, by weight, 54-56 parts of soybean straw, 32-34 parts of sweet potato vines, 3.5-3.7 parts of citric acid residues, 4.2-4.4 parts of pepper meal, 6.5-6.7 parts of bone meal, 4.4-4.6 parts of coffee residues, 0.05-0.07 part of triadimenol, 11-13 parts of potassium nitrate, 14-16 parts of ammonium phosphate, 7-9 parts of monopotassium phosphate, 0.21-0.23 part of bacillus megaterium, 0.14-0.16 part of rhizobium astragali, 0.27-0.29 part of azotobacter chroococcum, 3.6-3.8 parts of cattail leaves, 4.1-4.3 parts of potamogeton crispus, 2.7-2.9 parts of yucca gloriosa leaves, 3.2-3.4 parts of ervatamia divaricata leaves, 4-6 parts of clay and 3-5 parts of bentonite. The organic slow-release fertilizer special for corn is scientific and reasonable in formula, all raw materials act complementarily, the functions of effectively increasing and updating soil organic matter, prolonging fertilizer action time, promoting full absorption, utilization and conversion of corn to nutritional ingredients, achieving a high ripening rate and making grains full can be achieved, and the functions of effectively decreasing the monolepta hieroglyphica insect damage rate and the leaf blight disease damage rate and increasing the yield and hundred-grain weight of corn can also be achieved, so that higher economic profits are brought to farmer households.

The invention belongs to the technical field of water environment treatment, and particularly relates to aquatic-plant artificial turf and a preparation method and application thereof. The preparationmethod includes: adopting a lake shore zone soil and lake mud mixture as a fixation matrix and uncontaminated soil as a matrix for covering, and planting mixed seeds of potamogeton crispus clint, eelgrass, myriophyllum verticillatum and potamogeton pectinatus, wherein a proportion of lake shore zone soil and lake mud in the fixation matrix is 1-2:1. The artificial turf can sufficiently utilize water space resources and has good effect on improving water environment; the preparation method is easy to implement and simple in process.

The invention discloses a method for preparing magnetic biomass charcoal from potamogeton crispus and application thereof. The method comprises the following steps: 1, cleaning, drying and smashing potamogeton crispus and putting into a crucible, compacting potamogeton crispus powder to fill the crucible, covering the crucible with a crucible cover, and then using aluminum-foil paper for wrappingand sealing the crucible; putting the wrapped crucible into a muffle furnace, carrying out constant-temperature pyrolysis at 300-500 DEG C for 1 hour, and carrying out post-treatment to obtain potamogeton crispus biomass charcoal; 2, putting the potamogeton crispus biomass charcoal into a suction flask, connecting one end of the potamogeton crispus biomass charcoal into a vacuum pump, connecting the other end of the potamogeton crispus biomass charcoal into a beaker filled with a Fe < 3 + > solution, starting a vacuum pump to pump out air in pores of potamogeton crispus biomass charcoal powder, and closing the vacuum pump to suck the Fe < 3 + > solution into the suction flask; transferring the mixture in the suction flask into a three-neck flask, and adding a Fe < 2 + > solution; and carrying out constant-temperature magnetic stirring under a nitrogen condition, dropwise adding an alkaline solution until the pH value is equal to 10-11, and reacting to obtain the magnetic potamogeton crispus biomass charcoal. The method has the advantages of energy conservation, environmental protection, better environmental benefit and economic benefit and the like.

The invention discloses a modified sweet potato residue feed for improving a laying rate of chickens and a preparation method thereof. The modified sweet potato residue feed is prepared from the following raw materials in parts by weight: 500 to 520 of sweet potato residues, 12 to 14 of rabbit meat powder, 23 to 26 of freshwater shrimp powder, 7 to 8 of citric acid, 34 to 36 of eggplant seed powder, 15 to 17 of black sesame seed powder, 42 to 45 of oat powder, 3 to 4 of green pepper juice, 3 to 4 of radish paste, 4 to 5 of potamogeton crispus, 3 to 4 of caulis polygoni multiflori, 42 to 47 of silkworm chrysalis meal, 3 to 4 of red soy sauce, 3 to 4 of barley malt sprouts, 2 to 3 of jujube flower, 32 to 34 of pea meal, 0.3 to 0.4 of EM zymophyte, 4 to 6 of carrot powder, 2 to 3 of lophatherum gracile powder, and 1 to 2 of soybean phospholipid. The modified sweet potato residue feed disclosed by the invention can improve the laying rate of chickens, increase content of vitamins and trace elements in eggs, improve egg nutrition, increase an egg volume, and prolong an egg producing period; the feed is delicious and attractant; chickens fed by the feed lay more eggs; eggs have large volumes; egg yolks and egg white have good colors; egg taste is delicious.

The invention discloses a method for preparing potamogeton-crispus-enhanced air filter paper. Novel air filter paper is prepared from chopped glass fibers and glass cotton fibers which are different in fiber diameter; meanwhile, potamogeton crispus is added, and the filtering effect is further improved. According to the method, the technology is simple and reasonable, the finished product rate is high, and the production cost is low; the double-layer composite air filter paper is prepared from the chopped glass fibers and the glass cotton fibers which are different in fiber diameter, and the filtering efficiency is improved; meanwhile, the wind resistance is reduced, and the dust capacity is increased; meanwhile, as the potamogeton crispusa additive is added, the filtering effect on harmful gas such as formaldehyde can be further improved, and the dust capacity of the potamogeton-crispus-enhanced air filter paper is further increased.

The invention discloses feed. The feed is prepared from the following components in parts by weight: 20-30 parts of copper sulfate, 35-60 parts of magnesium sulfate, 10-15 parts of ferrous sulfate, 30-40 parts of zinc sulfate, 25-30 parts of manganese sulfate, 3-5 parts of sodium selenite, 5-10 parts of calcium iodate, 10-15 parts of an antioxidant A, 50-80 parts of chitooligosaccharides, 10-15 parts of an antioxidant B, 10-15 parts of D-calcium pantothenate, 25-30 parts of niacinaminde, 1-5 parts of vitamin A, 5-10 parts of esterifiable VC, 5-10 parts of vitamin E, 10-15 parts of threonine, 5-8 parts of compound enzymes, 35-50 parts of potamogeton crispus powder, 50-80 parts of methionine, 50-80 parts of choline chloride, 100-200 parts of carrier defatted rice bran, 10-15 parts of cobalt chloride, 10-20 parts of potassium iodide and 20-30 parts of potassium chloride.