50 results about "Ulva lactuca" patented technology

The invention belongs to the field of aquaculture or feed, relates to a aquaculture feed, and especially relates to an alga immunopotentiation compound feed for litopenaeus vannamei. The invention at first provides an immunity strengthening agent for litopenaeus vannamei feed, and the agent is obtained through enzymatic hydrolysis and fermentation of an alga composite. The alga composite is composed of following components in parts by dried weight: 40 to 50 parts of asparagus, 15 to 25 parts of enteromorpha, 10 to 20 parts of ulva lactuca, 5 to 15 parts of laver and 5 to 15 parts of undaria pinnatifida. The invention further prepares a compound feed for litopenaeus vannamei by utilizing the immunity strengthening agent. The alga immunity strengthening agent contains algae polysaccharide, which has the effect of strengthening animal immunity, acrylic acid, terpenes, brominated phenolic and some sulfocompounds, which have the antiseptic effect, and sulphated polysaccharide, which has the antivirus effect. The litopenaeus vannameis fed on the alga immunopotentiation compound feed have a strong anti-stress performance, the body's immunity ability is improved, survival rate is high and culture benefit is remarkable.

A crossbreed method for different geographical species parti-colour abalone, which relates to a genetic improved method for parti-colour abalone, especially relates to a crossbreed method using different geographical species parti-colour abalone which comprises, putting the abalone in 16-18Deg C. sea water and elevating temperature to make the parent abalone accelerate. The bait comprises gracilaria 100, Ulva lactuca 30-60, pinnatifida 20-50, spirulina 1-15. Injecting 5-hydroxytryptamine to the head or abdominal feet of the parti-colour abalone, and making the lay eggs and discharge spermium synchronous with a different geographical parti-colour abalone. Making artificial insemination and getting filial generation. and guaranteeing the survival rate during the line haul, making a two species parent parti-colour abalones mature in a same time by using reasonable bait breeding; Using ejecting 5-hydroxytryptamine to make the gamete discharge in a same time and overcome the physiological difference of gamete discharging and sexual maturity because of geographic isolation of different geographical species, and making the gonadal mature and gamete discharge at the same time.

A chocolate sesame paste is composed of the following raw materials in parts by weight: 280 to 290 parts of sesame paste, 60 to 70 parts of chocolate powder, 10 to 15 parts of rape flower, 20 to 30 parts of coriander, 30 to 35 parts of cucumber, 8 to 10 parts of paprika powder, 20 to 30 parts of soy sauce, 10 to 15 parts of honey, 35 to 40 parts of chicken, 20 to 30 parts of pig skin, 60 to 70 parts of cola, 5 to 6 parts of bletilla striata, 5 to 6 parts of peach blossom powder, 5 to 6 parts of tribulus terrestris, 6 to 7 parts of Chinese angelica, 2 to 3 parts of pericarpium granati, 2 to 3 parts of ulva lactuca, and 2 to 3 parts of radish seed. The chocolate sesame paste contains chocolate powder, thus has a unique flavor, also contains chicken and pig skin, thus is rich in nutrients such as collagen and protein, is rich in nutrients and has a beautifying function. Moreover, extracts of traditional Chinese herbals such as bletilla striata, peach blossom powder, tribulus terrestris, and Chinese angelica are added, so the chocolate sesame paste has very good functions of maintaining beauty and keeping young.

The invention relates to a feed additive in the aquaculture industry, in particular to a body color improver for pseudosciaena crocea cultured in net cages and a preparation method of the body color improver. Every kilogram of the improver comprises the following components in the content range: 10-20g of astaxanthin, 250-500g of zeaxanthin, 100-200g of ulva lactuca powder, and the balance of zeolite powder. The preparation method comprises the following steps of firstly crushing the raw materials, and performing screening with an 80-100-mesh sieve for standby application; and sufficiently anduniformly mixing the crushed materials in proportion so that the uniformity variation coefficient CV is smaller than 5%, so as to obtain the body color improver for pseudosciaena crocea cultured in net cages. The body color improver disclosed by the invention has the advantages that the body color of the pseudosciaena crocea can be effectively improved, so that the body color of the pseudosciaenacrocea is brighter, yellow and easier to accept by consumers; the total quantity of carotenoid in skins of the large yellow croaker can be effectively increased; the body color improver is convenientto use, and can be directly added to a fish feed or a minced fillet material; the body color improver is safe to use and nuisanceless, and the pseudosciaena crocea bred with the body color improver completely conforms to food hygiene demands; and the body color improver is stable in raw material sources, low in use cost, simple and convenient in making technology, and easy in industrialized popularization.

The invention discloses a functional seaweed feed capable of improving constipation of sows. The functional seaweed feed comprises the raw materials in parts by weight of 5-15 parts of entermorpha, 5-15 parts of ulva lactuca, 25-35 parts of kelp, 25-30 parts of undaria pinnatifida suringar, 10-15 parts of gulfweed and 10-20 parts of laver. The seaweed raw materials are mixed, water which is 1-3 times of the volume of the seaweed raw materials is added, then grinding and mashing are performed, then microecological preparations and enzyme preparations of bacillus subtilis, lactic acid bacteria,microzymes and the like are added for fermentation and enzymolysis, and finally, drying and crushing are performed, so that the functional seaweed feed is prepared. The seaweed feed additive has the advantages of being high in water-holding capacity and high in expansibility, and can effectively relieve constipation of the sows after being added to feeds of the sows. Besides, the seaweed has special functional matter, so that mould contamination can be avoided, and the resistibility of organisms can also be strengthened. Various minerals and other matter in the seaweed can promote growth and development of animals, and can improve the using efficiency of the feed. Organic iodine contained in the seaweed can also promote the development of mammary glands of the sows, can stimulate the lactation, and can strengthen the resistance and the like of piglets.

The invention belongs to the technical field of biomedicine and particularly relates to application of seaweed oligosaccharide in the preparation of an avian leucosis virus resistant preparation. seaweed oligosaccharide is prepared by degrading natural polysaccharides extracted from the macroalga Grateloupia filicina, Ulva lactuca, Sargassum fusiforme and other algae, has a wide source range, is simple to prepare, and has the advantages, as an antiviral preparation, such as naturalness, zero toxicity and environmental friendliness; in-vitro cell experiments prove that the seaweed oligosaccharide is capable of inhibiting the proliferation of avian leucosis virus, has significant antiviral effect, may be applied to livestock and poultry breeding as a novel antiviral preparation, and has high applicable value.

The present invention relates to a special compound feed accessory material for adult abalones and a preparation method thereof. The special compound feed accessory material solves technical problems that feeds for the adult abalones are poor in palatability, imbalanced in nutrition, poor in stability, etc. The special compound feed accessory material is prepared by adding Chinese herbal medicinal additives and mixed micro-organism liquid into the raw materials in parts by weight: 6-8 parts of imported fishmeal, 3-7 parts of yeast proteins, 3.5-5 parts of soybean meal, 2-3 parts of peanut cake meal, 4-5 parts of sweet potato powder, 2-3 parts of rice bran, 3-5 parts of wheat bran, 10-15 parts of red algae powder, 10-15 parts of ulva lactuca powder, 10-15 parts of sargassum muticum powder, 3-6 parts of silkworm chrysalis powder, 5-7 parts of soybean protein concentrate, 2-3 parts of taurine, 2-3 parts of sodium alginate, 0.5-1 part of bentonite, 0.5-3 parts of immunopolysaccharides, 0.2-0.3 part of VC phosphate ester, 0.2-0.3 part of betaine, 1.5-2.0 parts of abalone premixes, 8-10 parts of compound micro-organism powder and 0.8-1 part of a compound enzyme. The present invention also provides the preparation method. The preparation method is widely applied in the feed accessory material for the adult abalones.

The invention discloses a preparation method of an ulva fasciata polysaccharide-tween 20 compounded beta-carotene emulsion. The method comprises steps as follows: (1) ulva fasciata polysaccharide and tween 20 are dispersed in water in the mass ratio being 3: 2, and an ulva fasciata polysaccharide-tween 20 compounded solution with the mass concentration of 3%-4%, namely, an aqueous phase, is obtained; (2) an oil phase is obtained by dissolving beta-carotene in edible vegetable oil, the mass percentage of beta-carotene is 0.3%-0.5%, and the temperature is kept at 60 DEG C or below in the dissolution process; (3) the oil phase obtained in step (2) and the aqueous phase obtained in step (1) are mixed in the mass ratio being 1: (10-20) for shear emulsification, high-pressure homogenization is performed in an ice-water bath, and the beta-carotene emulsion is obtained. The method is convenient to operate, the cost is low, and the beta-carotene emulsion prepared with the method has high bioavailability, good stability and high biosafety.

The present invention discloses a large yellow croaker feed with effects of improving body color. The feed comprises the following components in parts by weight: 25-30 parts of white fish meal, 5-10 parts of whey powder, 2-5 parts of earthworm powder, 2-5 parts of yeast powder, 5-10 parts of potato dregs, 10-15 parts of barley flour, 2-5 parts of wheat bran, 2-5 parts of sophora leaf powder, 2-5 parts of dried mulberry powder, 2-5 parts of ulva lactuca powder, 10-15 parts of refined fish oil, 2-5 parts of schizochytrium limacinum DHA algae oil, 5-10 parts of linseed oil, 2-5 parts of sea-buckthorn seed oil, 5-10 parts of body color-improving components, sodium selenite and other minerals, VB1 and other vitamins, Bacillus bifidus and other beneficial bacteria, and lysine and other essential amino acids. The feed is reasonable in formula and balanced in collocation, provides balanced nutrition for the large yellow croaker, and can play a significant role in improving the body color at the same time through the addition of the body color-improving components.

The invention discloses a feed additive for treating goat urolithiasis and a preparation method thereof. The feed additive comprises the following raw medicinal materials: moupin dutchmanspipe stem or root, lacmus, desmodium styracifolium, ficus tikoua, juncus effuses, cucumber stem, muskroot-like semiaquilegia root, common aeschynomene stem-xylem, sinosenecio oldhamianus, medical stone, common triumfetta root, otolithum sciaenae, bighead atractylodes rhizome, argy wormwood fruit, placenta hominis, syngnathus schlegeli, liquorice, rhizoma polygonati, whiteflower cacalia seed and ulva lactuca. The feed additive has the beneficial effects that the feed additive disclosed by the invention has the main effects of clearing away heat and removing dampness, relieving stranguria by diuresis, strengthening spleen and warming kidney and tonifying Yang and removing calculi, has the auxiliary effects of invigorating spleen and replenishing qi and dispersing blood stasis and removing calculi and has the advantages of good treatment effect, a good curative effect, no toxic or side effects, difficulty in relapse and the like.

The invention belongs to the technical field of organic biological fertilizers, and discloses a natural adsorption material compounded biological organic fertilizer and a preparation method thereof. The biological organic fertilizer is prepared from the following components in parts by weight: 35-50 parts of organic fertilizer raw materials, 5-15 parts of microorganisms, 3-6 parts of biological compound enzyme, 15-36 parts of a natural adsorption material and 2-4 parts of a conditioning aid material, wherein the natural adsorption material comprises Cupressus lusitanica Mill. bark and ulva lactuca; and the conditioning aid material is mangosteen shells. The natural adsorption material in the biological organic fertilizer can effectively adsorb heavy metal ions in soil, so that the soil quality is improved, and the growth of crops is facilitated. The biological organic fertilizer disclosed by the invention can be suitable for any soil environment condition. The preparation of the biological organic fertilizer does not need a high-temperature condition, the preparation process is simple, and energy is saved. According to the biological organic fertilizer, the mangosteen shells are used as a conditioning aid, so that the generation of plant bacterial wilt can be prevented.

The invention relates to a method of purification cultivation of oyster in vivo heavy metal using kelp. The method comprises the steps that fresh asparagus, Gracilaria, Ulva lactuca, and other kelps are utilized and cultivated in a mixed mode with oysters for 7-14 days, the ratio of kelp and sea water is 1-5 kilograms: 1 cubic meter, the ratio of oysters and sea water is 10-20 kilograms: 1 cubic meter, after the processes of feeding a proper amount of platymonas subcordiformis, regularly replacing sea water, continuously inflating and the like, the heavy metal ions in the bodies of oysters can be significantly purified, after the purification, the heavy metal content is significantly lower than the safety level of GB 18421-2001 of the third category of the national standard, the purification efficiencies of Cu2+, Cd2+ and Pb2+ are respectively 32.82%-55.39%, 10.23%-15.91% and 60.42%-66.78%. The method of purification cultivation of oyster in vivo heavy metal using kelp is simple in method, easy to operate, short in cycle, low in cost, high in practicality, environmentally friendly and safe, provides a new method for purification of the heavy metal ions in oysters, and provides new ideas for the purification of heavy metal ions in seafood shellfish products.

The invention belongs to the water processing field, especially relating to a method for preparing an Skeletonema costatuma inhibitor, a method for preparing Ulva linza Linnaeus extract for inhibiting Skeletonema costatuma: leaching Ulva linza Linnaeus with sterilized sea water, alcohol, acetone, and aether or chloroform, concentrating the obtained extract by rotary evaporation, putting the concentrated extract into a to-be-processed water body to inhibit red tide alga growth in the water body, where ordinarily, per kg Ulva linza Linnaeus is leached with 30-50 L sea water for 0.5-2 days, the obtained extract is concentrated to 10% of its original bulk, and 2-10 ml concentrate is putted into per L to-be- processed water body. And the invention fully uses Ulva linza Linnaeus in Ulva linza Linnaeus plants, effectively inhibiting growth of harmful marine red tide alga, especially Skeletonema costatuma, and can be widely applied to various water bodies to implement red tide.

Disclosed are a microecological preparation for mariculture and a preparation method and application of the microecological preparation. The microecological preparation comprises lactobacillus acidophilus, bacillus subtilis, saccharomyces cerevisiae and bacillus laterosporus. The preparation method comprises performing bacteria liquid activation on lactobacillus acidophilus via an MRS medium, bacillus subtilis via a PDA medium, and saccharomyces cerevisiae and bacillus laterosporus via beef extract peptone; performing activation via a KJ medium, respectively, wherein the KJ medium comprises corn flour, soybean meal, wheat bran, brown sugar, fish meal, sea crystal, sodium chloride and zeolite powder; centrifuging the four nutrient solutions, performing mixing, and inoculating a KJ medium according to an inoculation amount for composite culture; inoculating a KJ medium with the obtained product, and allowing the obtained product to stand for culture to obtain a composite seed liquid; andinoculating a KJ medium with the composite seed liquid for fermentation cultivation to obtain the microecological preparation. The microecological preparation can improve the quality of water and inhibits growth of aerobes, such as harmful algae and ulva lactuca. The microecological preparation can be applied to mariculture, reduces the content of ammonia nitrogen, nitrite nitrogen and total phosphorus and reduces the incidence rate of aquatic product diseases.

The invention relates a method for producing green algae ulva lactuca smacks. Non-polluted fresh ulva lactuca is chosen, trimmed and cleaned and sliced into fragments with a side length ranging from 2 to 5mm; the fragments are soaked for 3 to 8 minutes in a flavoring liquid formed by soysauce, salt and monosodium glutamate under a temperature ranging from 15 to 40 DEG C. The soaked ulva lactuca is filtered by a filter gauze to eliminate the residual flavoring liquid and a pancake shape with a thickness of 2 to 5mm is formed on the filter gauze. The formed ulva lactuca is placed into an oven to be baked for 1 to 4 hours under a temperature ranging from 60 to 85 DEG C, roasted for 1 to 6 minutes in a microwave broiler and finally packed. The green algae ulva lactuca smacks is an algae food with delicious taste, convenience application, comparatively higher nutritious value and a certain health-care effect; a suitable method for the fully utilization of ulva lactuca is used for enhancing the resource utilization ratio and reducing the environmental pollution caused by the decaying of large quantity of ulva lactuca in coastal region, thus bringing forth a certain economic efficiency for coastal citizens and merchants.

The invention relates to a forage for lutianus stellatus Akazaki and a preparation method thereof. The forage comprises a protein-source raw material, a fat-source raw material, a sugar-source raw material and auxiliary materials, and is characterized by also comprising 5% by weight of ulva lactuca powder. The protein-resource raw material is fish meal; the fat-source raw material is selected from fish oil, soybean oil and mixture thereof; the sugar-source raw material is cassava starch; and the auxiliary materials is selected from composite vitamins, mixed mineral substances, microcrystalline cellulose, soybean phospholipid powder, DL-methionine, calcium dihydrogen phosphate, choline, ascorbic acid, squid paste and mixture thereof. The forage is composed of, in percent by weight, 41.71-42.24% of crude protein, 8.67-8.81% of crude fat, and the balance carbohydrates, crude fiber, ash and water. The forage for lutianus stellatus Akazaki helps lutianus stellatus Akazaki to have relatively high weight gain rate and survival rate, the usage amount of fish meal can be reduced, and the protein demand level of fingerlings is reduced.

The invention relates to an artificial cooperation feed, in particular to a meat quality improvement additive and compound feed for improving fish meat quality of largemouth bass, and a preparation method. The meat quality improvement additive comprises the following components based on air-dried substances in parts by weight: 5-10 parts of ulva lactuca powder, 2-3 parts of dried orange peel, 3-5parts of thetine, 2-3 parts of a macleaya cordata extract, 20-30 parts of sodium chloride and the balance of zeolite powder. Compared with a market-sold feed which is frequently used at present for improving the fish meat quality of largemouth bass, the meat quality improvement additive and compound feed for improving fish meat quality of largemouth bass have the following beneficial effects thatthrough cooperation of the ulva lactuca powder, the dried orange peel, the thetine and the macleaya cordata extract, the mouth feel and the flavor of the fish meat of the largemouth bass can be effectively improved, earth fishy smell can be eliminated, and the synergistic effects are significant; and the compound feed is balanced in nutrients, and after the largemouth bass take the compound feed,the largemouth bass grows quickly and is high in disease resistance.

The present invention discloses a mussel seafood flavor soybean milk, which is characterized in that the mussel seafood flavor soybean milk is prepared from the following raw materials by weight: 320-330 parts of soybean, 68-70 parts of pumpkin seeds, 20-25 parts of cassava starch, 77-80 parts of mussel, 60-65 parts of rubus corchorifolius fresh fruit, 45-50 parts of ulva lactuca, 3-3.2 parts of melissa officinalis, 3.1-3.4 parts of fructus alpiniae oxyphyllae, 2-2.2 parts of sodium cyclamate, 0.3-0.4 part of an anti-forming agent, 583-586 parts of white sugar, 1.4-1.7 parts of salt, and a proper amount of water. According to the present invention, the mussel seafood flavor soybean milk has characteristics of seafood flavor, rich nutrition, high nutritional value and a certain health preserving and health care effect, and before the processing grinding, the soybean raw material is directly pre-treated so as to effectively reduce the anti-nutritional factor in the soybean, such that the processed soybean has characteristics of good quality and good eating effect.

The invention discloses a broiler chicken feed additive capable of promoting growth and prepared by comprehensively utilizing coconut shells. The feed additive is prepared from the following raw materials in parts by weight: 25-28 parts of red grapes, 10-15 parts of gordon euryale seed powder, 12-14 parts of sunflower seeds, 14-17 parts of ulva lactuca, 4-5 parts of cushaw petals, 15-17 parts of orange peel, 9-12 parts of cloves, 6-7 parts of licorice roots, an appropriate quantity of coconut shells, an appropriate quantity of lactic acid bacteria, an appropriate amount of activated dry yeast, an appropriate amount of 0.2mol / L hydrochloric acid, an appropriate amount of 60% ethanol, an appropriate amount of acetone and an appropriate amount of water. The feed additive disclosed by the invention can promote the broiler chickens to eat, the growth speed of the broiler chickens is high, the fattening effect is obvious, the meat quality of the broiler chickens is sweet and fragrant, and the meat of the broiler chickens is rich in various nutrient values.

The invention belongs to the technical field of artificial breeding of coral, and particularly relates to a preparation method of composite liquid bait for artificial breeding of coral. Specifically, the composite liquid bait is prepared through the following steps of by using shrimp meat, mussel sexual gland and fish oil as raw materials, adding compound protein enzymes, and performing enzymolysis to prepare enzymolysis supernate and fish oil mixed liquor for standby application; by using ulva lactuca liquid and nannochloropsis oculata as raw materials, preparing nannnochloropsis gaditana and ulva lactuca mixed liquor for standby application; enabling saccharomyces cerevisiae, candida utilis seed liquid and rhodospirillum rubrum seed liquid to be made into mixed bacterium seed liquid for standby application; adding complex vitamins to all of the liquid for standby application so as to obtain the composite liquid bait for artificial breeding of coral. The composite liquid bait for artificial breeding of coral, prepared by the method disclosed by the invention, is comprehensive in nutrient components and good in balance, is harmless, and has the efficacy of purifying water quality, and the survival rate and the growth rate of the artificially bred coral can be increased.

The invention provides a feed capable of enhancing the capacity of fish for resisting virus diseases and a preparation method of the feed. The feed capable of enhancing the capacity of the fish for resisting the virus diseases is prepared from the following components in parts by mass: 30-40 parts of black bean powder, 30-50 parts of rice bran, 25-40 parts of pumpkin powder, 25-35 parts of wheat bran, 5-9 parts of herba portulacae, 4-10 parts of cabbage, 3-7 parts of begonia fimbristipula hance, 10-16 parts of ulva lactuca, 8-12 parts of cymbopogon citratus, 3-5 parts of rheum officinale, 4-5 parts of fineleaf schizonepeta herbs, 3-7 parts of plantain herbs, 6-9 parts of Chinese yam rhizomes, 3-6 parts of wilford granesbill herbs, 5-8 parts of gypsophila oldhamiana, 2-5 parts of Chinese taxillus herbs, 5-7 parts of poria cocos, 3-6 parts of asparagus and 0-3 parts of table salt. The feed disclosed by the invention is prepared through the technologies of drying, mixing, fermenting, granulating and the like. The feed is prepared from purely natural raw materials, safe and environmental-friendly, rich in nutrition, high in palatability and high in applicability, the capacity of the fish for resisting bacteria and viruses is enhanced, and the weight increment rate and the survival rate of the fish are notably increased.

The invention discloses a compound enzyme preparation for a high-vitality feed. The compound enzyme preparation consists of composite vitamins and composite trace elements, wherein the composite vitamins consist of vitamin A, vitamin D, vitamin E, vitamin K3, vitamin B1, vitamin B2, vitamin B6, vitamin B12, niacin, calcium pantothenate, folic acid, biotin, myo-inositol, vitamin C, carnitine, an antioxidant, a mildewproof agent, entermorpha powder, ulva lactuca powder, kelp powder, phytase and non-starch polysaccharides enzymes. Long-term breeding experiment proves that the additive is comprehensive in nutrients, safe, high-efficient and free from toxic and side effects; bred objects grow quickly, the feed conversion rate is high, and the breeding benefits are good; besides, the immune function and the stress resistance of the bred objects can be obviously strengthened, and cultivated livestock and poultry are good in vitality and high in survival rate; and the enzymes can achieve effects when acting under the acid condition in animal stomachs and under the slight neutral condition in intestinal tracts.

The invention provides a water-retaining agent used for saline-alkali soil soybean and containing straw powder raw material. The water-retaining agent comprises straw powder, crylic acid, acrylamide, ulva lactuca powder, laver powder, shrimp shell meal and sterculia lychnophora powder. The invention further provides application of the water-retaining agent to soybean planting in saline-alkali soil. The water-retaining agent has the advantages that the prepared water-retaining agent has high water absorbing capability in distilled water, tap water and NaCl solution with a concentration of 0.3%, the capability of water absorption in the distilled water can reach 800-950 times the weight of itself, the capability of water absorption in the tap water can reach 710-880 times the weight of itself, and the capability of water absorption in the NaCl solution with a concentration of 0.3% can reach 460-600 times the weight of itself.

The invention discloses a composite seaweed fertilizer and a preparation method thereof. The composite seaweed fertilizer comprises raw materials and auxiliary materials. The fertilizer is prepared from the following raw material components in parts by weight: 7-9 parts of seaweed, 5-7 parts of algae residues, 6-8 parts of microalgae residues, 4-6 parts of ascophyllum nodosum, 1-3 parts of Ecklonia kurome, 4-6 parts of kelp, 3-5 parts of gulfweed, 2-4 parts of Chewangzao, 2-4 parts of desert algae, 2-4 parts of Rhodomelaceae, 3-5 parts of fucus, 1-3 parts of enteromorpha, 1-3 parts of Ulva lactuca, 3-5 parts of Kappaphycus, 3-5 parts of brown algae, 2-4 parts of citrus peel residues, 1-3 parts of zeolite, 4-6 parts of shells and 4-6 parts of urea. According to the composite seaweed fertilizer and the preparation method thereof, compared with an organic fertilizer, thec omposite seaweed fertilizer use algae as main raw material, the cost can be effectively reduced, the environment optimization effect can be achieved, the manufacturing method changes a traditional evaporation and concentration process, energy consumption is reduced, and through the processes of drying, cooling, reacting, fermenting and the like, the composite seaweed fertilizer has the advantages that various nutrients in the algae are fully used, the cost is conveniently reduced, the application range of the seaweed fertilizer is widened, the environment is effectively protected and the like.

The invention belongs to the field of algae research, and discloses a method for obtaining epiphytic bacteria-free ulva lactuca. The method comprises the following steps that A, fresh ulva lactuca is placed in sterilized in-situ seawater, and the surface of the fresh ulva lactuca is brushed by using a sterilized writing brush to obtain a brushed ulva lactuca frond; B, the brushed ulva lactuca is mixed with a multi-enzyme cleaning agent, and ultrasonic cleaning is carried out to obtain enzyme-washed ulva lactuca fronds; C, the enzyme-washed ulva lactuca is mixed with antibiotics, and sterilizing is carried out to obtain sterilized ulva lactuca fronds; and D, the sterilized ulva frond is put into a sterilized culture medium to be cultured, and the non-epiphytic ulva is obtained. The problem that in the prior art, the normally-growing non-epiphytic ulva cannot be obtained is solved.

The invention relates to fresh sargassum thunbergii. The fresh sargassum thunbergii comprises the following components by mass percent: 55-70% of sargassum thunbergii, 25-35% of ulva lactuca and 5-10% of crab shell powder. A preparation and preservation method comprises the following steps: mixing the sargassum thunbergii, the ulva lactuca and the crab shell, and crushing the mixture into a mixed solution of granules and algae liquid; and diluting the fresh sargassum thunbergii with sterilized seawater, and preserving the fresh sargassum thunbergii in a sealed way. The prepared frozen product of the fresh sargassum thunbergii can keep nutrients of the fresh sargassum thunbergii before freezing and has the characteristics of balanced and all-around nutrition of the sargassum thunbergii; the ulva lactuca is introduced into the fresh sargassum thunbergii to partially substitute the sargassum thunbergii, so that the raw material source is very wide, the ulva lactuca is comprehensively utilized and advantages of environment friendliness and safety are sufficiently embodied; the added crab shell powder can effectively maintain a buffer system of the fresh sargassum thunbergii liquid and prevent degradation of the sargassum thunbergii; the preparation and preservation method is simple and feasible and can be implemented by only simple crushing equipment, simple freezing equipment and a low-temperature preservation refrigeratory; requirements on auxiliary facilities are not high; and the preparation and preservation method is easy to operate and implement.

The invention relates to fresh sargassum thunbergii. The fresh sargassum thunbergii is algae liquid prepared from sargassum thunbergii and ulva lactuca, wherein the mass ratio of sargassum thunbergii to the ulva lactuca is (3-4): 1. A preservation method comprises the following steps: diluting the fresh sargassum thunbergii with sterilized seawater, and preserving the fresh sargassum thunbergii in a sealed way. The prepared frozen product of the fresh sargassum thunbergii can keep nutrients of the fresh sargassum thunbergii before freezing and has the characteristics of balanced and all-around nutrition of the sargassum thunbergii; the ulva lactuca is introduced into the fresh sargassum thunbergii to partially substitute the sargassum thunbergii, so that the raw material source is very wide, the ulva lactuca is comprehensively utilized and advantages of environment friendliness and safety are sufficiently embodied; the preservation method is simple and feasible and can be implemented by only simple crushing equipment, simple freezing equipment and a low-temperature preservation refrigeratory; requirements on auxiliary facilities are not high; and the preservation method is easy to operate and implement.

The invention relates to fresh sargassum thunbergii. The fresh sargassum thunbergii is algae liquid prepared from sargassum thunbergii and ulva lactuca, wherein the mass ratio of sargassum thunbergii to the ulva lactuca is (3-4): 1. A preservation method comprises the following steps: diluting the fresh sargassum thunbergii with sterilized seawater, and preserving the fresh sargassum thunbergii in a sealed way. The prepared frozen product of the fresh sargassum thunbergii can keep nutrients of the fresh sargassum thunbergii before freezing and has the characteristics of balanced and all-around nutrition of the sargassum thunbergii; the ulva lactuca is introduced into the fresh sargassum thunbergii to partially substitute the sargassum thunbergii, so that the raw material source is very wide, the ulva lactuca is comprehensively utilized and advantages of environment friendliness and safety are sufficiently embodied; the preservation method is simple and feasible and can be implemented by only simple crushing equipment, simple freezing equipment and a low-temperature preservation refrigeratory; requirements on auxiliary facilities are not high; and the preservation method is easy to operate and implement.

The control of green macroalgae blooms. More particularly, Ulva algae blooms may be controlled by a living active principle contained in seawater from the Mediterranean Sea. The inventors have observed that seawater from the Mediterranean Sea collected in particular spots (collected at, e.g., latitude 43° 14′N and longitude 5° 21′E, or at latitude 43° 09′N and longitude 5° 36′E) is capable of promoting the death of Ulva lactuca, without the emission of toxic acidic vapors, such as, e.g., H2S vapors. Altogether, the inventors provide data showing that this seawater comprises an alive microorganism that is responsible for promoting the death of Ulva, in particular of Ulva lactuca. More precisely, the inventors provide experimental data showing that the microorganism that promotes the death of Ulva lactuca, and hence promotes the control of Ulva lactuca blooms, is a virus.