326 results about "Sexual maturity" patented technology

The invention discloses a black pig breeding method which comprises the following steps: (1) selecting a pig farm site; (2) sterilizing before breeding; (3) breeding piglets; (4) sexual maturity stage; (5) gestation period; (6) stages of labor; (7) suckling period; (8) transitional period; and (9) disease control. According to the mode, the black pig breeding method disclosed by the invention has the advantages of naturalness, no pollution, no hormone, growth rhythm accordance, whole-course good care, staging breeding and the like and has wide market prospects in popularization.

Synchronous induced spawning for parent fish better solves the problem of sexual maturity through synchronous development of female and male parent fish. The invention discloses an artificial propagation method for sturgeon, which comprises the steps of selection of parent fish, parent fish rearing, induced spawning, artificial insemination, zygote hatching, artificial selection of fish fry, and fish fry rearing. In the artificial propagation method, by artificially reducing water temperature and ambient environment temperature, micro water flow is formed to simulate the ecological environment for the reproduction of sturgeon, the simulated ecological environment is similar to the conditions necessary for the reproduction of wild sturgeon in the natural world, and the artificial low temperature factor lasts for a long time, so as to always guarantee the low temperature environment for the maturity and awaiting delivery of parent fish of the sturgeon, and meet other condition requirements, so that the parent fish can rut and spawn all year round to finally achieve the factory production of the sturgeon fry; meanwhile, in the artificial propagation method, female parent fish and male parent fish of the sturgeon are separately put into an artificially simulated ecological environment for inducing oestrus, and then the degree of sexual maturity of the parent fish is identified to select the parent fish with basically developed sexual maturity.

The invention relates to a method for producing fly maggots for feeding chickens in a chicken farm. The method includes the following steps of (1) laying eggs, placing aseptic fly pupae in a fly house to incubate for 4 to 5 days to form imagoes, enabling the imagoes to reach to sexual maturity after 2 to 5 days, starting mating, and maintaining the temperature of the fly house in a range from 22 DEG C to 30 DEG C; (2) receiving the eggs, placing egg collecting substances prepared by wheat bran and water through effective microorganisms (EM) in a white plastic box, forming egg clusters by laid eggs, and incubating the egg clusters for 16 hours at the temperature of 60 DEG C; (3) preparing nutrient mediums by 80% of wheat bran and water, EM and pig blood, placing the nutrient mediums in a maggot growing house, spreading the nutrient mediums, placing the egg collecting substances and the eggs on the nutrient mediums uniformly, growing the eggs into larvae after 4 days, and separating out the larvae; and (4) maintaining the room temperature in a range from 20 DEG C to 30 DEG C and the humidity to be 60%, enabling the larvae to be transformed into pupae after 2 to 3 days, and incubating the pupae for 4 to 6 days to form flies. By means of the method, after the produced fly maggots are fed to the chickens, the laying rate of the chickens is increased, eggs laid by the chickens are physically beneficial and environment-friendly, drug residues are absent, and the bred chickens are fresh and tender in meat quality and free of tranig.

The invention discloses a method for breeding a new species of lean meat type pigs-Shennong No. 1, which includes: A) the erhualian sow as female parent and the yorkshire boar as male parent are in cross breeding to obtain the yorkshire*erhualian cross bred sow; then, cross breeding female parent is in cross breeding with the danish landrace boar to obtain danish*( yorkshire*erhualian) ternary hybrid pigs; B) a fundamental selective breeding group of danish*( yorkshire*erhualian) ternary hybrid pig is formed and selected as zero-generation of Shennong No. 1; C) the boars and sows are mated to obtain piglets, good piglets are selected gradually for seed reservation; D) the good piglets are continuously cultivated until sexual maturity, the outstanding individual female and male pig are reserved as the next generation of swine respectively according to reproductive performance and meat quality as well as carcass performance and growth performance; E) the step C) and D) are repeatedly operated for 4-15 times. The main selective breeding indexes of the Shennong No. 1 pig are based on the reproductive performance and meat quality, the Shennong No. 1 pigs have the advantages of good meat quality, which is manifested in red meat color, good water holding capacity, high intramuscular fat, and good tenderness and the like. Referring to the reproductive performance, the number of the first-born Shennong No. 1 sow is more than ten.

The invention discloses a middle-early grape culturing method for ensuring extremely early maturity, high quality and disaster avoidance, belonging to the technical field of fruit cultivation. The method comprises the following steps: (1) selecting a variety; (2) releasing the dormancy stage as early as possible; (3) mulching an outer sky film, a ground film and an inner sky film; (4) controlling the temperature and the humidity in a greenhouse; (5) controlling grape diseases; (6) managing flowers and fruits and bagging; (7) girdling; (8) harvesting when grapes are mature, and the like. By using the culturing method, the cold damage in early spring and typhoon damage in July and August can be avoided, fruits can be sufficiently mature before the end of June which is 15-20 days earlier as compared with a grape greenhouse culturing method and 30-45 days earlier as compared with an open field culturing method, the fruits are excellent in quality and safe to eat, and the benefit of grapes per mu can be increased by over 60%. The method can be popularized and applied in grape culturing areas, such as Jiangsu, Zhejiang, Shanghai and the like.

The invention discloses a laying hen raising period complete feed, which comprises the components in weight part as follows: 350-450 parts of maize, 150-200 parts of wheat, 50-100 parts of soybean meal, 10-40 parts of peanut meal, 30-40 parts of cottonseed meal, 10-30 parts of rapeseed meal, 40-60 parts of maize protein feed, 40-80 parts of DDGS (distillers dried grains with soluble), 70-150 parts of rice bran meal, 15-25 parts of mountain flour, 10-25 parts of bone meal, 5-6 parts of soybean oil, 6-10 parts of calcium hydrophosphate, 2.5-3 parts of salt, 1-2 parts of sodium sulfate, 0.5-1 part of choline, 2 parts of compound microelement, 2-5 parts of lysine, 1-1.5 parts of methionine and 1.3 parts of additive. According to the invention, the laying hen raising period complete feed is low in cost; after the laying hens are fed with the complete feed, the weight of laying hens can reach or exceed a breed standard before laying, and the body maturity and the sexual maturity of the laying hens are synchronous.

The invention provides an ecological factorial breeding method of coilia ectenes parent fish. The ecological factorial breeding method of the coilia ectenes parent fish comprises the following steps: 1) an ecological spawning pond is built; 2) parent fish is selected; 3) the ecological spawning pond is processed; 4) the ecological spawning pond is managed; 5) the breeding is managed. The ecological factorial breeding method of the coilia ectenes parent fish artificially simulates a Yangtze River coilia ectenes breeding migration rule, the parent is provided with an ecological factorial breeding migration environment, by artificially controlling the external conditions of water flow, water temperature, illumination intensity and a period, osmotic pressure and the like, the fresh food intensity is strengthened, the parent is enabled to develop from body maturity to sexual maturity, parent fish can be kept every year, and the sustainable development of coilia ectenes ecological factorial breeding is achieved.

The invention discloses a method for incubating largemouth basses ahead of time. By using the method, the largemouth basses are bred in a greenhouse, sexual maturity is achieved ahead of time, and the largemouth basses are bred artificially. The method comprises the following steps of selecting largemouth basses with the weight of 0.5-0.8 kilogram in the middle ten days of the October and breeding the largemouth basses in the greenhouse in cold days; controlling the temperature of water from the middle ten days of the October, controlling the temperature of the water in the January to be in a range of 11-13 DEG C, then gradually raising the temperature of the water, and raising the temperature of the water to be in a range of 20-22 DEG C in middle ten days of the March; anatomically observing the condition of sexual maturity of parent basses; injecting oxytocin to the parent basses at the beginning of the April, and enabling the parent basses to lay eggs in a plastic-covered tunnel with palm sheets; and placing the palm sheets with germ cells in an indoor incubation pond and incubating the germ cells. By using the method, 1281 fries with the total length of 3.5 millimeters are obtained. At the present stage, largemouth basses cannot be artificially incubated in the northern China, and particularly, the largemouth basses cannot be incubated in the April of the northern China. The largemouth basses fries can be obtained ahead of time for 40 days. The growing period of the fries in the current year is prolonged for 40 days.

The invention relates to a breeding method for Laiwu pigs. The breeding method comprises the following steps of S1, pig farm site selection; S2, pig farm sterilization before breeding; S3, piglet breeding; S4, sexual maturity period; S5, pregnancy period; S6, labor period; S7, suckling period; S8, disease control. The breeding method has the beneficial effects that the breeding method for the Laiwu pigs is safe and reliable, a natural nuisanceless breeding method is adopted, and the production regularity of the Laiwu pigs is followed, so that the vitality is enhanced, the yield is increased, and a wide market prospect is obtained for popularizing a black pig breeding method.

The invention relates to a sow feeding method of a special wild pig. The method comprises the following steps: (1) feeding sows to reach sexual maturity when the sows are 6-7 months old and are 75-80 kg weight and reach body maturity when the sows are 7-8 months old and 80-90 kg weight and mating the sows; feeding and mating 4-6 non-pregnant sows in each pigsty; feeding each sow at the first trimester of pregnancy in a limiting pigsty or in an independent pigsty, 2-4 sows at the mid trimester of pregnancy in each pigsty and 1-2 sows at the later trimester of pregnancy in each pigsty, and feeding the sows on obstetric tables from 7 days before parturition to weaning; (2) reinforcing sow feeding management, meeting nutritional requirements in the non-pregnant to-be-mating period, the first trimester of pregnancy, the mid trimester of pregnancy, the later trimester of pregnancy and the suckling period, preparing daily rations for the different periods, feeding different feeds, and paying attention to rational matching of green and coarse fodders and concentrated feeds. According to the sow feeding method, the feed and the control for feeding are optimized, so that the sows rut quickly, the farrowing rate is high, normally 12-14 piglets are born by each sow, and the survival rate is over 90 percent.

The present invention provides for a method for inducing sterility in fish by administering at least one compound that disrupts the establishment of the gonadotropin-releasing hormone system during early development thereby inhibiting sexual maturity in the treated fish. Effective compounds include GABA, GABA receptor agonists, or GABA receptor antagonists.

A health-care forage for promoting empathema of sow and preventing miscarriage of sow is prepared from soybean cake, fish powder, corn, corn protein, bran, calcium hydrogen phosphate, stone powder, mineral vitamins, and 12 Chinese-medicinal materials including dandelion herb, lily bulb, yam, wolfberry fruit, etc.

The invention discloses a cryopreservation method for sperms of ablen, which comprises the following steps of: sampling the sperms, performing microscopic examination, mixing the sperms and an antifreeze agent, and freezing. The cryopreservation method is simple and feasible, has obvious effect and good cryopreservation effect. If the sperms of the ablen most important in Chinese aquiculture are preserved by the method, the activity of the unfrozen sperms is more than 90 percent, and the bottleneck problems of insufficient male fish and asynchronous sexual maturity of female and male parent fish in the ablen culture are effectively solved.

The invention discloses a tilapia fry rearing method. The tilapia fry rearing method comprises the following steps: breeding parent tilapia fries which are bigger than nine-sieve, picking parent tilapias which are disease free, injury free, strong and good in sexual maturity to rear, hybridizing the female parent tilapias and with the male parent tilapias according to ratio of stocking, picking up roes, incubating the roes with flowing incubating water in an incubating tank, cultivating the roes by marking in bold, and cultivating fries. Oviposition period is shortened by about seven days, incubating rate is as high as 67.9%, fry survival rate is 89.6%, each female tilapia lays 6700 fries each year averagely, fry production rate is improved by 30%, and the sizes of the fries are uniform. By means of the tilapia fry rearing method, fries can be reared all through a year, a large amount of tilapia fries are reared and the tilapia fries grow fast and are strong in stress resistance. The tilapia fries reared in mass are born at the same time, gonad developments are synchronous, sizes are the same, characters are unified, and heredity purity is high. Moreover, the tilapia fry rearing method has the advantages that incubating period is short, incubating efficiency is high, inheritable characters are good, fertility is strong, and fries can be reared in an overwintering mode.

The invention relates to a breeding method of queen bees. The method comprises the specific steps of selection of a field, an environment, selection of a bee species, selection and demands of a queenbreeding colony, organization of the queen breeding colony, management of the queen breeding colony, larval transplantation for queen breeding, larval transplantation, organization of a coupling colony, a queen introduction method, a management method of the coupling colony, coupling control over Chinese bees, queen replacement time of the Chinese bees and a queen replacement method of the Chinesebees. By means of the method, a proper environment and rich nutrient conditions are created, according to the number and time which are required by a plan, batched good-quality queen bees are bred, and accordingly the aims of colony multiplication and good species popularization are achieved. The sexual maturity periods of drones and the queen bees are reasonably selected, and the sexual maturityperiod of the bred queen bees can be matched with the puberty of the drones. During queen breeding, a colony which is poor in swarming performance and good in species character and can maintain the large swarm is reasonably selected, used as a breeding colony and used for breeding new queen bees and drones respectively. By reasonably using queen replacement of the queen bees and factors such as the climate, the honey source, the population of the bee colony and the behavior and physiological states of the queen bees, introduction of the queen bees easily succeeds.

The invention belongs to the technical field of breeding of poultry, and discloses a method for breeding a new strain of black-bone chickens with higher production performance, which comprises the following steps in sequence: taking a Chinese black-bone chicken as a male parent and a foreign broiler chicken as a female parent, producing F1 generation through hybridization, and retaining a hen having black bone, black shin and black skin characters in the F1 generation; taking the male parent in the step 1 as a male parent to conduct mating with the hen of the F1 generation to produce F2 generation through hybridization, selecting a cock and a hen which have same feather and appearance as that of the male parent in the step 1, as well as the black bone, the black shin and the black skin characters; carrying out intercrossing and propagation to individuals obtained from the step 2, improving the grow speed and the egg producing performance according to a family and individual selection method, laying stress on the black skin, sexual maturity and the feather and the appearance characters; and conducting system breeding of four or more than four generations to obtain the new strain of black-bone chicken. The method obviously promotes the growth speed of the Chinese black-bone chicken at early stage, reduces feed-to-chicken ratio, and improves propagation performance under certain conditions.

The invention provides an artificial breeding method of Scaphesthes macrolepis fry, comprising: selecting sexual-maturity Scaphesthes macrolepis parent fish older than 3 years, and making sets at the ratio of female to male of 1:2; keeping the put density of parent fish in a spawning pond to be 6-8 sets / m<2>; putting one spawning nest for every 10 sets of parent fish, and laying coarse sand of which the average thickness is 4-6 cm in the spawning nest for the parent fish to spawn and unstick; in the spawning season, injecting oxytocic hormone into the parent fish to induce the parent fish to spawn and release sperm; making an incubation groove by battens and bolting silk; putting oosperm into the incubation groove to hatch in still water, wherein the dissolved oxygen in the incubation groove is more than 5mg / L, the illumination intensity is more than 1500-3000Lux, and the water temperature is 20-22 DEG C; after demoulding, temporarily breeding in the incubation groove; and after the fry floats up and flatly swims, introducing the fry into a plastic bag filled with water to be oxygenated and packaged or introducing the fry spawning pond. The method of the invention can intensively obtain the Scaphesthes macrolepis fry which favourably develops on batch, has simple operation and high parent fish fertility rate, is favourable for realizing large-scale production of Scaphesthes macrolepis and has an important meaning for protecting and culturing the Scaphesthes macrolepis wild resource on large scale.

Improved varieties of Brassica napus having early maturity ("Early Napus") and resistance to an AHAS-inhibitor herbicide, such as an imidazolinone, are provided. These varieties may be used to produce inbreds or hybrids or to produce vegetable oil and meal. Parts of these plants, including plant cells, are also provided.

The present invention discloses a black pig breeding method. The method comprises the following steps: (1) pig farm address selection; (2) baby pig breeding; (3) a sexual maturity period; (4) pregnancy; (5) a delivery period; (6) lactation; (7) a transient period; and (8) disease control. By the mode, the black pig breeding method provided by the present invention has the advantages that black pigs bred by the method are natural, harmless and free of hormone, conform to a growth law, are taken good care of in the whole process and are bred in stages; by adopting high nutrition concentration forage and a scientific and reasonable feeding mode, the goal of improving a nutrition level and immunity of mother and child pigs is finally achieved; and the method has widespread marketing prospects on terms of extension of the black pig breeding method.

Disclosed is a recessive white feather green-shelled-egg bantam germ plasma resource cultivation method. Green-shelled genes of green-shelled-egg chickens are introduced to recessive white feather bantam groups, recessive white feather genes, short-legged genes and the green-shelled genes are combined and homozygous by means of hybridization and test mating, a family is built on the basis, the groups are expanded in a breeding manner by the aid of family selection and individual selection, and recessive white feather bantam germ plasma resources with green-shelled-egg laying characteristics are cultivated. The cultivation method has the advantages that recessive white feather bantams are selected to improve the green-shelled-egg chickens, the green-shelled-egg chickens are changed into recessive white feather green-shelled-egg bantams, and the breeding problem of the green-shelled-egg chickens can be effectively solved. Short and small hens with small bodies are suitable for cage culture, consume less feed but lay eggs as many as normal individuals (so that feed efficiency is higher). Besides, the short and small hens have the outstanding advantages of early sexual maturity, reduction of raising space, disease resistance and the like, the production cost of goods generation chickens can be greatly reduced, comprehensive raising benefit is improved, recessive white feathers are recessive as compared with colored feathers of native chicken breeds, and feather colors of filial generations of the chickens in the same place are as same as those of indigenous chickens, so that feather color mixing can be avoided.

The invention belongs to the field of molecular genetics and particularly relates to a molecular marking method of a mutant site related to a 5' control region of a chicken miR-1b-3p gene and chicken sexual maturity and laying number traits and an application thereof in chicken breeding. The mutant site is a -734(G is greater than A) site. Genetic typing among three different groups is performed and the laying trait associated analysis is performed by means of a KASP technology, and the result shows that the site is extremely related to the laying start age and egg numbers in 32 weeks and 48 weeks (p is smaller than 0.01), and the laying start ages of genes AA and AG are extremely obviously earlier than that of GG gene, the egg numbers of the genes AA and AG in 32 weeks is extremely obviously greater than that of the gene GG but the egg number of the gene AA in 48 weeks is extremely obviously greater than those of the genes AG and GG. By detecting the molecular marker related to the laying trait, egg varieties / strains which are early to mature and high in yield are bred favorably, and favorable help is brought to local chicken breeding work.

The invention belongs to the technical field of poultry breeding. A method for breeding a new strain of black-bone chicken with higher production performance comprises the following steps of: step 1, taking parents of foreign broiler chicken as female parents instead of hen CD, and the black-bone chicken with jute feather inland as male parents, and generating a generation F1 through cross breeding, selecting and leaving individuals with jute feather, black bone, and black skin in the generation F1; step 2, crossing and propagating the female individuals and the male individuals obtained in the step 1, and separating out jute feather, recessive white feather, black feather, and reed catkins, and removing recessive white feather, from the colored feather colony through crossing, and purifying and fixing the hair color, black bone, black shin, sexual maturity and other appearance characters according to the family and individual selective method, improving the growing speed, reproductive performance and other economic characters; step 3, through the breeding of four or more generations, successfully breeding the new strain of the black-bone chicken with relatively higher production performance in jute feather, recessive white feather, black feather, and reed catkins. The method improves the early growing speed and egg laying performance of the black-bone chicken in the nation, and obviously reduces the feed / gain ratio.

The invention relates to a feed, and in particular relates to replacement gilt feed containing traditional Chinese medicinal components. The feed is prepared from the following raw materials in parts by weight: 60-70 parts of corn, 12-15 parts of fried soybean flour, 8-10 parts of peanut straw, 12-15 parts of soya bean meal, 12-15 parts of dried brewer grain, 12-15 parts of rapeseed cake, 2-3 parts of egg shell powder, 4-5 parts of duckweed dried powder, 5-6 parts of dried pawpaw, 4-5 parts of dried loofah sponge, 3-4 parts of small dried crucian, 2-3 parts of fish bone powder, 2-3 parts of traditional Chinese medicinal additives, a proper amount of edible salt and 4-5 parts of phagostimulant. The feed is rich in raw material types, and can meet the requirement for normal growth of gilt; the pure natural traditional Chinese medicinal additive not only contains multiple trace elements, but also contains rich active substances, so that the development of the reproductive system can be promoted, sexual maturity of gilt can be accelerated, the estrous cycle can be shortened, the body shape of gilt is normal and does not have the phenomenon of over-fertilization, and an excellent base is provided to subsequent multiplication, and all raw materials are pure natural green raw materials and do not have adverse influence to gilt.

The invention discloses a method for hybridizing female verasper variegatus and male verasper moseri for breeding and fry cultivating, comprising the steps of selection of parents, parent fish cultivation and reproduction control, artificial insemination and incubation and cultivation of fish larvae and juvenile fish, wherein female verasper variegatus older than 3 years is selected to be used as a female parent, and male verasper moseri older than 2 years is selected to be used as a male parent; and the sexual maturity synchronization of the female parent fish and the male parent fish is promoted by means of temperature control, light control and nutrition enhancement. With respect to the artificial insemination, the insemination rate reaches 50%; the water temperature for incubation is (10+ / -0.5) DEG C, fish larvae can be incubated from inseminated eggs after 160 hours, and the incubation rate reaches more than 50%; and with respect to a feed series, L-type brachionus plicatilis and chlorella sp., artemia nauplii, and compound feed are respectively applied in different stages. The fish larvae (1-35 days in age) in an early stage are cultivated in a small water body (3m<3>) at the water temperature of (10+ / -0.5) DEG C; after 3 days, the temperature is raised by 0.5 DEG C every 2 days and is kept unchanged after reaching (15+ / -0.5) DEG C; and the fish larvae in a later stage are cultivated in a water body (30m<3>). After cultivating for 80 days, the survival rate of the fish larvae growing into the juvenile fish of 30mm in average is 20%. The method disclosed by the invention can be used for cultivating novel breeds and realizing scale breed reproduction.

The invention discloses a bee breeding artificial insemination culturing method, comprising the following steps: (1) male bee culturing: culturing fine-quality bee breeding by using excellent bee breeding, and culturing a virgin queen before sexual maturity of male bees; (2) semen collection: preparing a semen diluent, placing in a bottle, sterilizing in high temperature, placing the semen diluentin a collection pipe of a semen collector, scraping the semen and mucus of the male bees to the diluent by a sterilized glass rod, and placing the collector into a centrifuge tube of a centrifuge forcentrifugation so as to separate semen when enough semen is rinsed in the diluent; and (3) insemination: selecting the virgin queen of sexual maturity, placing in an anesthetic room, carrying out artificial insemination when the virgin queen is in a comatose state, and removing narcosis after insemination. The swarm cultured by the method in the invention is improved in the aspects of collectionability, disease resistance, stress resistance, oviposition rate, bee milk yield and the like, and the collected royal jelly and pollen yield are enhanced.

A method for distant hybridization between subfamilies of cyprinus carpio and megalobrama amblycephala includes the following steps that firstly, female cyprinus carpio and male megalobrama amblycephala which have obvious sexual maturity characteristics and good somatic features are selected as parent fishes for special pool breeding, then, artificial spawning induction is conducted on the parent finishes in a breeding season, the parent fishes with a good spawning induction effect are selected to be subjected to artificial dry-method fertilization, running water incubation is conducted on fertilized embryos in a pure water incubation device, fish fry are raised after being incubated, the raised fish fry are detected and screened, hybrid offspring of the cyprinus carpio and the megalobrama amblycephala are obtained through flow cytometry DNA content determination and renal tissue chromosome ploidy detection, and the hybrid offspring comprise diploid natural gynogenesis cyprinus carpio, diploid natural gynogenesis mirror carps, diploid fish like the cyprinus carpio and tetraploid hybrid fish. The method has the advantages that the rate of fertilization is high, the incubating rate is high, the offspring are excellent in character, and the method has great significance in genetic breeding.

The invention discloses a method achieving one-generation breeding of all-female pelteobagrus fulvidraco. The method comprises the following steps that 1, cold treatment induction is conducted on a fertilized ovum obtained by taking super-male pelteobagrus fulvidraco as a male parent and taking ordinary female pelteobagrus fulvidraco as a female parent to obtain all-male triploid pelteobagrus fulvidraco, and oogonial cells are separated from an ovary of ordinary sex-mature female pelteobagrus fulvidraco; 2, the oogonial cells are microinjected to the belly cavities of all-male triploid pelteobagrus fulvidraco larvae; 3, after sexual maturity of the larvae in the second step is achieved, sperms of a donor X chromosome are generated, insemination is conducted between the sperms of the donor X chromosome and the ovum produced by the ordinary female pelteobagrus fulvidraco, and the all-female pelteobagrus fulvidraco can be obtained. According to the method achieving one-generation breeding of the all-female pelteobagrus fulvidraco, the sperms of the X chromosome are directly generated through germ cell transplantation. Therefore, an all-female pelteobagrus fulvidraco breeding system can be rapidly established only through one-generation breeding, and all-female offspring are generated; compared with a traditional all-female pelteobagrus fulvidraco breeding method, the time can be shortened by one year; due to the fact that germ cells of the pelteobagrus fulvidraco are transplanted to the pelteobagrus fulvidraco, transplantation is conducted between the same species and variety, and a higher success rate can be obtained.

The invention discloses a breeding method of laying hens. The breeding method comprises a chick feeding period, a young chicken feeding period, a broiler feeding period, a laying hen feeding period, and sanitation and epidemic prevention during in the feeding process; and according to physical condition requirements of the laying hens at different stages, the illumination, humidity and feeding times at various different stages of the whole feeding are adjusted. Compared with the prior art, the breeding method of laying hens, disclosed by the invention, has the advantages of simple operation and low cost of breeding, has very good economic benefits, and realizes synchronization of body maturity and sexual maturity of the laying hens scientifically and reasonably by adjusting the illumination, humidity and feeding times at various different stages of the whole feeding according to the physical condition requirements of the laying hens at different stages, thereby ensuring nutrient balance for the laying hens, and achieving that the duration of the egg laying peak is long, and the egg production is increased.

The invention belongs to the technical field of bamboo rat cultivation, and particularly relates to a cultivation method of bamboo rats. After a bamboo rat grows to be 15-day years old, self-made feed is fed to the bamboo rat in the morning, at the noon and at night per day at a weight ratio of 1:1-2:1-2. After the bamboo rat is weaned and grows to be 3-month years old, feed is fed in the morning and at night per day, wherein 70-80 parts by weight of coarse feed and 20-30 parts by weight of concentrated feed are fed to each bamboo rat per day. When the bamboo rat is weaned within 5-7 days, 0.5-1ml of milk is fed to each young bamboo rat 1-2 times per day. When the bamboo rat grows between 3-years old and sexual maturity, mixed feed is fed to the bamboo rat in the morning and at night per day. After the bamboo rat is mature, feed is fed to the bamboo rat in the morning and at night per day, wherein 20-25g concentrated feed is fed to each bamboo rat per day for once and 100-150g coarse feed is fed for each bamboo rat per day for twice. The cultivation method is characterized by high fertilization rate, high survival rate and balanced nutrition, and a phenomenon that the mother rat eats the baby or bits the baby is avoided.