218results about How to "Reduce deformity rate" patented technology

The invention discloses a health care type compound boar feed. The health care type compound boar feed is prepared by the raw materials of corn, bran, puffing soybean meal, fermented soybean meal, fish meal, sucrose, soybean oil, limestone used for feed, calcium hydrophosphate, salt, sodium bicarbonate, potassium chloride, compound premix for the boar, L-lysine hydrochloride, and a special functional additive for the boar. The invention takes physiological characteristics of the boar and many factors in the aspects of raising, growth, breeding, stress and the like into the consideration to design a nutrient balance diet. The health care type compound boar feed can promote the toughness of legs of boars and the climbing capability, prolong the life of the boars, enhance the anti-oxidation capability and the immunity of the bodies of the boars, reduce the rate of sperm deformation, improve the spermatogonium activity, sexual desire and ejaculation amount of the boars to improve the farrowing quantity of sows, enhance the toughness of the muscular tissues of the bodies, reduce the excessive fat sedimentation, enable the bodies of the boars to be strong, and reduce the boar stress caused by various factors.

The invention relates to a hatching device and method for demersal spawns of marine fishes. The hatching device comprises a net cage, a water channel, a bracket, a temperature controller indicator, a probe, a heating rod, a water inlet hose, a sinker, an air inlet hose, an air stone and an annular water injector, wherein the net cage and the bracket are located in the water channel; the net cage is bound on the bracket; the water inlet hose and the air inlet hose are located in the water channel outside the net cage; the upside of the net cage is provided with the annular water injector; and the probe and the heating rod are arranged in the water channel. The hatching method comprises the following steps of: controlling a hatching condition; hatching; carrying out microscopic examination observation; carrying out secondary water temperature controlling; managing routinely; collecting larva fish and the like. The hatching method has the advantages that spawn deposition is avoided because of conical point inflation; spawns adhered on net cage edges are washed at any time by the annular water injector; the net cage is conveniently replaced; the water temperature is stably controlled by an electric temperature controller; and the fresh water quality can be ensured due to water feeding and drainage modes of water feeding of the annular water injector at the upside and water feeding of the water channel at the bottom and overflowing of the periphery of the water channel. Therefore, by means of the hatching device and method, a hatching rate of the demersal spawns of the marine fishes in the industrial fry breeding is improved.

The invention relates to a diluent of frozen semen of a milk goat, and a preparation method and a diluting method thereof as well as a preparation method of frozen semen of the milk goat in a thin pipe. In an existing frozen semen storage method, sperms are struck by low temperature to cause structure change of plasmalemma, so that the integrity of the plasmalemma and the survival rate and the fertility of the sperms after resuscitation are seriously influenced. The preparation method is characterized in that thin-pipe freezing treatment with two-step dilution and balancing and two-step cooling is carried out on fresh semen, wherein a basic diluent is prepared from Tris, citric acid, glucose, trehalose, Vc, GSH, BSA, ATP, compound antibiotic, yolk and water; a frozen diluent is prepared from the basic diluent and glycerinum; the diluent is utilized for diluting and balancing the fresh semen, and the fresh semen is sub-packaged in thin pipes and is stored in liquid nitrogen. According to the invention, the effects of low-temperature storage and freezing storage of the frozen semen of the milk goat is good, the survival rate, the integration rate of acrosome and the integrity of the plasmalemma of the semen after unfreezing are effectively increased, the aberration rate is reduced and the production efficiency and the quality of the frozen semen of the milk goat are improved.

The invention relates to rejuvenation of degenerated edible bacterial strains, in particular to a method for rejuvenating cordyceps militaris strains, which mainly comprises steps of cordyceps militaris strain activated culture, cordyceps militaris strain rejuvenation, and cordyceps militaris strain conservation. The method is characterized in that: the rejuvenation culture is that: the activatedcordyceps militaris strain is inoculated to a potato dextrose agar (PDA) plate which is compounded with one or more kinds of antibiotics for first rejuvenation culture, and the strain which is subject to first rejuvenation culture is inoculated to a PDA plating culture medium which is compounded with one or more kinds of antibiotics for second rejuvenation culture. The invention breaks through the traditional strain rejuvenation method, and rejuvenates the strain by an antibiotic method which is easy to operate, simple and practical, and has remarkable effect. The strain which is rejuvenated by the method has robust and compact hypha, and the growing speed of the strain is improved by about 8 times compared with that of the strain which is not rejuvenated.

The invention discloses a feed for parent fish of Cynoglossus semilaevis and belongs to a technology for preparing a marine fish compound feed. In the feed, the adding amount of fat is 8 percent, and the ratio of n-3 fatty acid to n-6 fatty acid is 2.81. The fat added into the feed for the parent fish of the Cynoglossus semilaevis is fish oil and soybean oil, and the content of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the fish oil is higher than 30 percent; and according to the formula, the feed for the parent fish of the Cynoglossus semilaevis comprises 70 percent of white fish meal, 6 percent of casein, 10 percent of flour, 2 percent of phospholipid, 1 percent of choline, 0.5 percent of vitamin C, 0.5 percent of multi-vitamin, 0.5 percent of complex mineral, 1.5 percent of calcium hydrophosphate, 2.5 percent of soybean oil and 5.5 percent of fish oil. A certain proportion of fish oil which is rich in the EPA and the DHA is added into the feed for the Cynoglossus semilaevis, and is matched with the soybean oil, so that the n-3 fatty acid and the n-6 fatty acid in an appropriate ratio are provided for the Cynoglossus semilaevis, the egg laying amount of the Cynoglossus semilaevis can be improved, the abnormality rate of fries can be reduced, and the lengths of 12-day fries can be increased.

The invention discloses a special concentrated feed for improving the quality of boar semen, which comprises the following components in parts by weight: 200-300 parts of corn flour, 300-360 parts of low-antigen soybean meal, W3 fatty acid, 60-100 parts of mountain flour, 80-100 parts of calcium hydrophosphate, 30-50 parts of salt, 1-5 parts of complex vitamins, 20-25 parts of complex minerals, 1-5 parts of VC, 1-5 parts of VE, 1-5 parts of yeast selenium, 1-5 parts of sweetener, 1-5 parts of antioxidant, 1-5 parts of flavoring agent and 1-10 parts of complex enzyme preparation, wherein the concentration of the yeast selenium is 0.1%. The special feed of the invention can improve the quality of the boar semen, improve the conception rate of sows and reduce the breeding return rate, thereby reducing the nonproductive number of days of the sows and improving the litter size and the total number born of each sow per year.

The invention relates to a manufacturing method for animal feed, in particular to a manufacturing method for a special animal feed exclusively used in fox, mink and raccoon dog. The method has the advantages that: raw materials of corn and soybean meal required in the formula are bulked by a dry method or wet method and ground; the ground material is mixed with meat and bone meal and imported fishmeal, and then bulked again (by the dry method or wet method); the second bulking is completely different from other bulking methods for an annular space discharging mode is adopted in the discharging in front of a bulking machine in the second bulking and the bulking temperature is 100-130 DEG C, which not only realizes the aim of sterilization and curing, but also avoids breaking the nutritional factors of the materials due to over-high temperature; the product produced by the process has high bulking degree, good water binding capacity, good palatability and thorough sterilization. The premix materials are added and mixed twice to avoid reducing the effect caused by heating.

The invention discloses a phospholipid polyphenols anti-oxidant and preparation method thereof. The phospholipid polyphenols anti-oxidant comprises the following components in part by weight: 10 to 40 parts by weight of plant polyphenols and 60 to 90 parts by weight of phospholipid. According to the invention, the plant polyphenols and the phospholipid are prepared into the phospholipid polyphenols anti-oxidant; and the phospholipid polyphenols anti-oxidant can be uniformly dispersed in various fats and oils in an emulsified manner, plays a role of oxidation resistance to fats and oils, and ensures that fats, oils, vitamin, carotene and other nutritional ingredients contained in food, fodder and the like do not spoil easily, so that the storage life can be prolonged.

The invention belongs to field of fish breeding and aquaculture, which in detail relates to a method of artificial crossing with summer-bothus and tooth-Bothus and breeding. It comprises following steps: (1) taking summer-bothus as male parent and tooth-bothus as female parent, reinforcing the nutrient and environmental condition to promote simultaneous gonadal maturity, getting mature sperm and ovum; (2) crossing fertilized ovum and hatching; (3) culturing the hybrid body and young fish; (4) providing systematic bait in culturing period. The invention not only provides material for deseription improvement for bothus and soles, but also the lies foundation of adding a new breeding species for sea fish cultivating.

The invention relates to special concentrated feed for anti-heat stress breeding boars, and belongs to the technical field of livestock feeds. The special concentrated feed for anti-heat stress breeding boars is prepared from high protein soybean meal, small peptide protein, steam fish meal, dietary fiber, emulsified fatty powder, soybean oil, mountain flour, calcium hydrophosphate, sodium chloride, glucose, lysine, N-carbamylglutamic acid, composite inorganic trace elements, composite organic trace elements, decavitamin, vitamin E, vitamin C, probiotics, choline chloride, macleaya cordata extracts, phytase and antioxidants. The special concentrated feed has the advantages that the cooperated effect of the recipe ingredients are emphasized; the physiological requirements of breeding boars under the heat stress condition can be met; the sperm viability is improved; the rate of teratosperm is reduced; the palatability is improved; under the multiplex nutrition measures, the semen quality of the breeding boars under the heat stress condition is effectively improved; the re-service rate of sows is reduced; and the annual farrowing number of the sows can be improved.

The invention discloses a larimichthys crocea parent fish compound feed which is composed of the following raw material components in parts by weight: 1000 parts of brown fishmeal, 600-800 parts of white fish meal, 150-200 parts of puffed soybean meal, 60-80 parts of green gram starch, 150-200 parts of beer yeast powder, 30-50 parts of phaffia rhodozyma powder, 140-150 parts of liver powder, 80-100 parts of squid meal, 500-600 parts of high gluten flour, 100-200 parts of kelp powder, 40-60 parts of soya bean lecithin powder, 40-60 parts of fish oil, 10-15 parts of choline, 5-15 parts of taurine, 3-9 parts of VC, 1-3 parts of VE, 0.5-1 part of inositol, 20-40 parts of bone meal, 5-10 parts of monocalcium phosphate, 20-40 parts of salt, 10-20 parts of vitamin premix and 20-30 parts of mineral substance premix. According to the invention, the egg laying amount, spawning rate, fertility rate and hatching rate of larimichthys crocea parent fish and the survival rate of larimichthys crocea fries can be obviously improved, and the abnormality rate of the fries is reduced.

The invention relates to a multivitamin tablet for pregnant women. 1000 multivitamin tablets contain the following materials: 1-2g of vitamin A, 5.5-6.5g of vitamin E, 0.1-0.4g of vitamin B1, 0.2-0.5g of vitamin B2, 0.2-0.45g of vitamin B6, 0.02-0.06g of vitamin B12, 20-35g of vitamin C, 0.3-0.6g of vitamin D3, 0.05-0.15g of folic acid, 450-550g of calcium carbonate, 38.5-40g of ferrous gluconate, 20-30g of zinc gluconate, 0.35-0.65g of Seleno-k-carrageenan, 2-4g of nicotinic acid, 218-238g of starch, 140-150g of dextrin, 2-7g of magnesium stearate, 15-25g of polyvinylpyrrolidone, 18g of hydroxypropyl methylcellulose, 3g of polyethylene glycol, 6g of titanium dioxide and 3g of talcum powder. The tablet provided by the invention contains various vitamins required by pregnant women and trace elements such as calcium, iron, zinc and the like, and can provide multiple elements for normal growth of fetus. By the use of the tablet, growth of fetus is promoted, and aberration rate of fetus is reduced.

The invention relates to an industrialized fry cultivation method of oval pompano. The method comprises the steps of incubation, transfer of the fries, cultivation of fish larva and juvenile, fodder domestication and the like; according to the method, the fry cultivating processes are all conducted indoors, incubating and raising processes are not influenced by weather, and the yield of raised fries is greatly improved; the method can be used for carrying out directed screening to fed bait, and the fry survival rate in the stage is greatly improved; the requirement of fries on EPA and DHA is ensured, and the fry quality is guaranteed; in the process of industrialized cultivation, the temperature, salinity, dissolved oxygen and other factors in a fry cultivating water body are relatively stable, the aberration rate of the fries is effectively reduced, and the survival rate of the fries is improved; a fry separating sifter is utilized to periodically screen the fries, the self-injury of the fries is reduced, the survival rate of the fries is improved, and meanwhile, the homogeneity of the fries is guaranteed; the method has the advantages that the occupied area for industrialized cultivation of the fries is small, the water demand is less, the sewage discharge is less, and the influence on natural environment is small.

The invention discloses a traditional Chinese medicine composition for tonifying kidney and producing sperm. The medicament is used for treating symptoms such as aspermia, oligospermia and sperm weakness resulted from insufficiency of the kidney yang. The medicament takes antler, ginseng, cordyceps, psoralen, polygonum multiflorum, dodder, medlar, polygonatum kingianum, eucommia and the like as raw materials; and according to the characteristics of each Chinese medicinal herb, a low temperature grinding method is combined with a water extracting technology, a comprehensive action of components is utilized, and then a suitable solid preparation is made. Clinical data shows that the medicament can obviously improve the quality of sperm, has the function of producing sperm, nourishing sperm and protecting sperm, can promote sperm maturation and increases the sperm motility.

The invention provides a complete compound feed for boar, which is prepared from the following raw materials: 50-55% of corn, 10-14% of peeled soybean meal, 13-17% of wheat, 6-10% of soybean hulls, 3-7% of wheat bran, 0.5-1.7% of fermented soybean meal, 1-3% of fish meal, 1-1.7% of calcium hydrophosphate, 0.8-1.4% of limestone powder, 0.1-0.5% of lysine, 0.04-0.06% of methionine, 0.06-0.10% of threonine, 0.01-0.02% of compound enzyme preparation, 0.06-0.1% of probiotics, 0.2-0.4% of sodium bicarbonate, 0.1-0.2% arginine hormone and 0.5-1% of compound premix for boar. The feed provided by the invention has complete nutrition, is easy to digest and absorb, obviously reduces heat stress of the boar, improves volume of semen of each time of ejaculation and sperm motility, increases total number of each time of ejaculation and semen dilution quantity, and improves breeding capacity of the boar.

The invention provides an artificial pollination device for saline-alkali soil greenhouse organisms. The artificial pollination device comprises a pollen placing chamber, wherein a pollen outlet is formed in the bottom of the pollen placing chamber; the bottom of the pollen placing chamber is connected with a pollination tube at the middle of the pollination tube; a nozzle is formed in the left end of the pollination tube; an air cylinder is arranged at the right end of the pollination tube; an air outlet of the air cylinder is connected with an air outlet pipe; an air spray head is arranged at the tail end of the air outlet pipe; the air spray head is positioned on the right side of the pollen outlet; the air outlet of the air cylinder is also connected with an air inlet pipe; a pressing block is arranged on a piston rod of the air cylinder. According to the invention, the artificial pollination device replaces labor and sticks a picked male flower to a female flower for pollination, avoids human body movements, saves manpower and material resources, is high in pollination efficiency for female flowers and pollination rate, and the plants pollinated by using the device are high in fruit setting rate; through the adoption of the device, pneumatic spraying is adopted, and the acting force indirectly acts on stigmas, so that the damage to stigmas is effectively avoided, and the fruit aberration rate is reduced.

The invention discloses an anti-heat stress feed additive for improving reproductive function of male rabbits. The anti-heat stress feed additive is added to a basal diet feed prepared for maintaining the right amount of recommended NRC (National Research Council) (1977) adult rabbits for uniformly mixing. The anti-heat stress feed additive added to a ton of feed comprises the following components by weight: 100 to 800g of lipoic acid, 100 to 600g of vitamin E, 100 to 600g of vitamin C and 0 to 600g of Saccharicterpenin. A result shows that the additive can obviously improve sperm viability and density and reduce abnormal rate (P<0.05), wherein anti-stress test 3 has the advantage of improving sperm viability; anti-stress test 2 has the advantage of improving sperm density; and all of the three additives can obviously improve the content (P<0.05) of testosterone in serum of heat stress bucks and do not have obvious difference (P>0.05) for improving the content of T3 and cortisol.

The invention discloses a method for artificially propagating pseudobagrus fulvidraco fries in autumn. The method comprises the following steps: (1) selecting and cultivating parents; (2) cultivating the parents; (3) laying eggs and fertilizing, namely a, carrying out artificial spawning by adopting exogenous hormones; and b, carrying out artificial insemination; and (4) carrying out incubation management. The method for artificially propagating the pseudobagrus fulvidraco fries is specific to summer and autumn high-temperature seasons, malformation rate of the fries is reduced, and effective rate and survival rate of the fries are improved.

The present invention provides probiotic food which can be pasteurized and stored at room temperature, is free of post-acidification, and can be heated or brewed for drinking, and a preparation methodthereof. The preparation method of the probiotic fermented food comprises a method of using bifidobacterium adolescentis and bacillus coagulans sectional fermentation to prepare the heatable probiotic drink or probiotic brewing food. Specifically, soybean powder, small hyacinth bean powder, tartary buckwheat powder, Chinese wolfberry fruit powder, red date powder, etc. are used as main raw materials to prepare a liquid or solid fermentation substrate; the bifidobacterium adolescentis is used to conduct a liquid fermentation or solid fermentation; then bacillus coagulans is further inoculatedto conduct a further fermentation; after the liquid fermentation, emulsification, stabilizer adding, acid adjusting, flavor treating, homogenizing and pasteurizing are conducted to prepare the heatable probiotic drink; or after the solid fermentation, drying and crushing are conducted to prepare the probiotic brewing food.

The invention provides a method for inducing young elaphe carinata to eat non-living feeds, and belongs to the technical field of snake-raising methods. The method comprises the following steps of: 1, hatching elaphe carinata eggs with vermiculites; 2, collecting young elaphe carinata in 4 to 8 hours after hatching, and breeding the young elaphe carinata in a breeding room; 4, from the fourth week, feeding the young elaphe carinata with living suckling mice; 4, on the fourth to sixth day after the young elaphe carinata get feeding for the first time, feeding the young elaphe carinata with the mixture of unfrozen sliced pork and the suckling mice; and 5, feeding the young elaphe carinata with the mixture of the unfrozen sliced pork and the suckling mice every 4 to 6 days, wherein during each feeding, the content of the suckling mouse in the feed gradually decreases, the content of the sliced pork in the feed gradually increases, and the young elaphe carinata is completely fed by sliced pork in one month after the induction begins. The newly hatched young elaphe carinata are induced to actively eat low-price non-living open baits which are easy to process and store and can be added with additives easily by utilizing the imprinting behaviors of animals; in addition, the feeding method is independent of limitation of seasons, easy to operate and low in feeding cost; and the survival rate of young elaphe carinata is high.

The invention discloses a method for establishing a giant grouper sperm freezer and assisting grouper distant hybridization breeding. The sperm freezer establishing method comprises the steps of preparing sperm diluent, preparing sperm cryopreservation liquid, freezing and storing sperms and establishing the sperm freezer. The grouper distant hybridization breeding method comprises the steps of establishing the giant grouper sperm freezer, establishing saladfish breeding groups, cultivating saladfish parent fish and performing reproductive regulation, performing artificially spawning breeding, fertilizing the frozen sperms and performing incubation, and cultivating fries. According to the method, the first giant grouper sperm freezer is established in China, reproductive isolation of the groupers caused by factors, such as geographical distribution, optimum temperature range and breeding time, is overcome, and distant hybridization breeding of the grouper groups is possible, so that distant hybridization breeding varieties are cultivated.

The invention discloses a compound feed for breeding boars. The compound feed comprises the following components in percentage by weight: 60-66% of corn flour, 3-5% of fish meal, 4-7% of fermented soybean meal, 10-15% of soybean meal, 10-11% of bran, 0.3% of multiple minerals, 0.5% of table salt, 0.04% of multiple vitamins, 0.12% of choline, 1.2% of dicalcium phosphate, 0.02% of phytase, 1.2% of stone powder, 0.12% of lysine, 0.03% of a probiotics compound and 0.5-1.0% of a Chinese herbal medicine compound for producing sperm. The compound feed disclosed by the invention is reasonable in formula design, provides comprehensive balanced nutrition for breeding boars, and creatively provides the Chinese herbal medicine compound for producing sperm, so that difficult problems that the semen quality is reduced and the sexual desire of the boars is poor caused by large sperm collection intensity of the breeding boars are solved; and the Chinese herbal medicine compound for producing sperm has the effects of nourishing the liver, nourishing the kidney, benefitting sperm, replenishing blood, reinforcing the spleen, invigorating the stomach and the like, so that after the breeding boars eat the compound feed, the sexual desire of the breeding boars is strengthened, the sperm viability, the sperm density and the semen volume are obviously improved, and the sperm abnormality rate is obviously reduced.

The invention discloses a method for generating a hybrid liriodendron somatic embryo by using jasmonic acid methyl ester. The method comprises the following steps: seed sterilization, induction of embryonic callus, establishment of an embryogenic cell suspension line, acquisition and transition of liquid single cells, and induction of generation of the hybrid liriodendron somatic embryo. The method is characterized in that when generation of the hybrid liriodendron somatic embryo is induced, the jasmonic acid methyl ester and ABA are added in the culture medium, or the jasmonic acid methyl ester is independently added in the culture medium. According to the method for generating the hybrid liriodendron somatic embryo by using the jasmonic acid methyl ester, a plant growth regulator MeJa is added, the inductivity of the somatic embryo is increased effectively, the abnormal rate is reduced, the generating efficiency of the hybrid liriodendron somatic embryo is improved further, the practicability is good, and establishment of a hybrid liriodendron rapid propagation system is facilitated.

The invention discloses a novel application of flagellin derived polypeptide. The invention provides an application of flagellin derived polypeptide in preparing a product for treating and / or inhibiting testicular injury diseases. The flagellin derived polypeptide is preferably CBLB502. The flagellin derived polypeptide CBLB502 can prevent injury of testis induced by chemoradiotherapy and can be used for preparing a drug for inhibiting injury of testis.

An indoor cement pit artificial propagation method for scatophagus arguses includes the steps of scatophagus argus parent strengthening rearing, parent gonad synchronization control, expectant parentselection, artificial insemination and fertilized ovum sectional hatching. The method is characterized in that 3-month old scatophagus arguses are placed into an indoor cement pit and subjected to over-wintering strengthening rearing from the last ten-day period of November in a last year to February in a current year, scatophagus argus reserve male and female parents are separately stocked in different tanks in middle ten days of March, temperature and salt are increased step by step from the last ten-day period of November in the last year to April in the current year until water temperaturereaches 28-29 DEG C and salinity reaches 24-28, the scatophagus arguses are kept under water environment conditions for one month, the selected parents are subjected to artificial insemination to obtain fertilized ova, and the fertilized ova are hatched in a hatching cylinder in a sectional manner and then transferred into a fry rearing tank for hatching to obtain newly-hatched fries.

The invention discloses a feed additive for increasing stock boar seminal fluid quality, wherein the feed additive consists of the following raw materials in parts by weight: 10-30 parts of bacillus subtilis, 10-15 parts of a selenium-enriched yeast agent, 3-5 parts of a selenium-enriched tea powder, 5-9 parts of angelica sinensis, 4-6 parts of eucommia ulmoides, 10-12 parts of morinda officinalis, 13-15 parts of dodder, 15-20 parts of cynomorium songaricum, 18-20 parts of semen allii tuberosi, 14-18 parts of fructus psoraleae, 2-5 parts of N-carbamylglutamate, 3-8 parts of a trace element amino acid chelate, 48-56 parts of compound vitamin, 45-55 parts of starch, and 35-40 parts of wheat bran. The feed additive can increase sperm quantity and sperm vitality of stock boars, improves the seminal fluid quality, and increases the reproduction ability of the stock boars.

The present invention discloses a prevention and treatment method of saprolegniasis in an incubation period of hucho bleekeri fertilized eggs. The method comprises the following steps: from the second day of incubation of the fertilized eggs, the fertilized eggs are soaked using running water containing formaldehyde every day; soaking liquid enters form the bottom of an incubator and is discharged out from the top of the incubator, a flow rate is controlled, so that the fertilized eggs do not roll over due to the excessive flow rate, the operation is continuously conducted for 30 min each time, and in the soaking process, the operation is conducted in dark place without vibration. After 30 min, normal incubation water is used to conduct running water incubation, and in the stages from the development of the fertilized eggs to early incubation (at an average incubation temperature of 7.5 DEG C and an accumulated temperature reaching 127 DEG C-170 DEG C), formaldehyde disinfection is stopped. Artificial methods are used to remove dead eggs until the fertilized eggs come out from membranes. The method is used to conduct the disinfection of the hucho bleekeri fertilized eggs, the incidence of the saprolegniasis can be reduced by 80% or more, and the deformity rate can be reduced to be 3% or below after emergence by using the method,.

The invention relates to special boar compound feed and a preparation method thereof, and belongs to the field of feed compositions and feed processing. The compound feed mainly comprises, by weight, 48.5-57.5 parts of corns, 14-18 parts of bean pulp, 0.5-0.9 part of mountain flour, 5-13 parts of wheat bran, 0.1-0.3 part of choline chloride, 1-5 parts of soybean hulls, 1-2 parts of soybean oil, 1-3 parts of rice bran meal, 1-3 parts of steamed fish meal, 1 part of compound premix, 1-3 parts of alfalfa meal, 2-5 parts of expanded flaxseeds, 0.2-0.5 part of lysine, 0.3-0.7 parts of taurine, 0.15-0.2 part of baking soda, 0.01-0.02 part of L-threonine, 0.03-0.05 part of mycotoxin adsorbents, 0.02-0.03 part of Danquine 1 and 0.5-1 part of glucose. According to the special boar compound feed, sperm number of boars can be increased, sperm activity and sperm density of the boars are improved, sperm aberration rate is reduced, and fertilization rate is increased.

The invention discloses a cultivation method for brachymystax lenok fry. The cultivation method includes the steps of A, artificial incubation; B, fry opening feeding; C, transferring out of an incubation tank for cultivation, and stocking at reasonable density; D, pool dividing domestication, wherein palatable bait is selected, food domestication control is conducted, and meanwhile scientific daily management and disease prevention are conducted. According to the biological characteristics of brachymystax lenok, total artificial regulation is conducted on the aspects of water temperature, illumination, dissolved oxygen and the like, the advantages that the physiques of the fry are healthy, strong and balanced, the bait utilization rate is high, environmental tolerance is high, and disease resistance is high are achieved by means of food intake regulation and standard management, and the fertilized ovum hatching rate of the brachymystax lenok and the growth rate and survival rate of offspring fishes are greatly increased. The offspring fishes are healthy, strong and balanced, high environmental tolerance and disease resistance are achieved, and occurrence of malformation is greatly reduced. The method is simple, high in operability, good in practical applicability and completely suitable for large-scale production of the fry, and is used for species resource protection and natural population restoration of the brachymystax lenok accordingly.

The invention discloses a feed additive and a mixed batch for improving the semen quality of breeding boars. The feed additive disclosed by the invention contains the following components in part by weight: 1-2 parts of broken-walled haematococcus pluvialis powder, 2.5-5 parts of small peptide proteins and 2-4 parts of organic zinc. The feed additive is adopted for feeding adult breeding boars, the sexuality of the breeding boars can be improved, and especially the semen quality can be increased in summer, for example, the semen production quantity, the semen vitality and the semen density are improved, the semen deformity rate is reduced, and the like.