CN114831077A - Method for hybridization purification of local black pigs - Google Patents
Method for hybridization purification of local black pigs Download PDFInfo
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- CN114831077A CN114831077A CN202210633628.XA CN202210633628A CN114831077A CN 114831077 A CN114831077 A CN 114831077A CN 202210633628 A CN202210633628 A CN 202210633628A CN 114831077 A CN114831077 A CN 114831077A
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- 241000282887 Suidae Species 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009396 hybridization Methods 0.000 title claims abstract description 16
- 238000000746 purification Methods 0.000 title claims abstract description 12
- 210000003205 muscle Anatomy 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 210000000582 semen Anatomy 0.000 claims description 75
- 241000282898 Sus scrofa Species 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000003085 diluting agent Substances 0.000 claims description 22
- 238000009395 breeding Methods 0.000 claims description 14
- 230000001488 breeding effect Effects 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 12
- 230000013011 mating Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 201000010099 disease Diseases 0.000 claims description 7
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 210000002445 nipple Anatomy 0.000 claims description 7
- 230000001954 sterilising effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- 230000003115 biocidal effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 210000000038 chest Anatomy 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 4
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- 235000013305 food Nutrition 0.000 claims description 4
- 210000001035 gastrointestinal tract Anatomy 0.000 claims description 4
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- 238000003860 storage Methods 0.000 claims description 4
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- 238000012360 testing method Methods 0.000 claims description 4
- 210000001550 testis Anatomy 0.000 claims description 4
- 229960005486 vaccine Drugs 0.000 claims description 4
- 229940088594 vitamin Drugs 0.000 claims description 4
- 229930003231 vitamin Natural products 0.000 claims description 4
- 235000013343 vitamin Nutrition 0.000 claims description 4
- 239000011782 vitamin Substances 0.000 claims description 4
- 150000003722 vitamin derivatives Chemical class 0.000 claims description 4
- 230000000249 desinfective effect Effects 0.000 claims description 2
- 238000009402 cross-breeding Methods 0.000 claims 1
- 235000015277 pork Nutrition 0.000 abstract description 7
- 210000001087 myotubule Anatomy 0.000 abstract description 6
- 238000010411 cooking Methods 0.000 abstract description 3
- 235000013372 meat Nutrition 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/02—Breeding vertebrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the technical field of native black pigs, and discloses a method for hybridizing and purifying native black pigs, which is characterized in that 10 boars of an A variety with the weight of 500 kg are selected according to the physical and appearance characteristics, the physical and appearance characteristics are that body muscles are plump and solid, the chest is wide and deep, the back and the waist are flat or slightly arched and wide, and ribs are round and arched; the developed skin of the back trunk and the hip is bright and smooth, the boar of the A variety is a black pig, and 10 sows of the B variety with the weight of 500 kg are selected. According to the method for hybridization and purification of the local black pigs, the D-breed sows produced by the A-breed boars and the B-breed sows are hybridized with the C-breed boars, so that the immune bodies of the pigs are improved, the finally obtained pig breeds are excellent in meat quality, tender and juicy in muscle, fine in muscle fiber, high in density, moderate in muscle marbling distribution, full of fat particles among the muscle fibers, and capable of generating special fragrance during cooking, so that healthy pork can be influenced more, and good living conditions are achieved.
Description
Technical Field
The invention relates to the technical field of local black pigs, in particular to a method for hybridization and purification of local black pigs.
Background
The pig is a vertebrate, mammal, and domestic animal, and is also ancient omnivorous mammal, and is mainly divided into domestic pig and wild pig. At present, pigs are considered as a short name of the porcine animals, and have different physical and morphological characteristics according to different varieties; it is characterized by big ears, long head, short limbs, straight nose, fat body and narrow waist and back. The hair is relatively coarse and stiff and the fur color is usually white, pink, black, brown and fancy.
As common meat product black-soil pig pork in life, the pork needs to be captive before the pork does not become the black-soil pig pork, the common captive breeding mode cannot enable the black-soil pig to grow better, the black-soil pig is easy to infect various diseases in the growth process and cannot grow normally, further economic loss is caused to a certain extent, the farrowing amount of the black-soil pig cannot reach a good level, the integral yield of the black-soil pig is low, merchants breeding the black-soil pig cannot obtain good economic benefits, and if the black-soil pig is in a low-yield stage for a long time, the price of the black-soil pig is increased, the delicious black-soil pig cannot be obtained, and the black-soil pig cannot grow healthily.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for hybridization and purification of the native black pigs, which has the advantages of treating diseases and pests, increasing the yield and the like, and solves the problem that the yield of the star anise is low and no special fertilizer for the star anise is available.
(II) technical scheme
In order to achieve the purposes of treating diseases and pests and increasing the yield, the invention provides the following technical scheme: a method for hybridization purification of a native black pig comprises the following steps:
s1, selecting boars
Selecting 5-10 boars of A variety with the weight of 300-500 kg according to the body appearance, wherein the appearance is characterized in that body muscles are full and firm, the chest is wide and deep, the back and the waist are flat or slightly arched and wide, and ribs are round and arched; the developed skin of the posterior trunk and the developed hip is bright and smooth, the boar of the A variety is a black pig, 5-10 sows of the B variety with the weight of 300-500 kg are selected, the sow of the B variety is selected from a variety with wide local distribution as a female parent, the reproductive performance of the female parent is good, the oestrus symptom is obvious, 5-10 boars of the C variety with the weight of 400-500 kg are selected, and the boar of the C variety is a Landerris pig variety.
S2, feeding boars
Selecting 5-10A breed boars with the weight of 300-500 kg, 5-10B breed sows with the weight of 300-500 kg and 10-15C breed boars with the weight of 400-500 kg in the step S1 to perform column management, feeding 3-6 boars in each column, keeping the temperature in the enclosure dry and sanitary, keeping the temperature in the enclosure at 18-20 ℃ all the time, sterilizing and disinfecting the enclosure every 1-3 days, adding a proper amount of medicine into food after feeding for 3-5 days to prevent and treat diseases of digestive tract, respiratory tract and the like, inoculating a vaccine to the boars after feeding for 6-10 days, manually observing for 3-5 hours, and adding a proper amount of antibiotic to improve the immunity if a pathological reaction occurs.
S3 hybridization of breeding pigs
After feeding the breeding pigs for 30-60 days, selecting 5-10 boars of the A variety with the weight of 300-500 kg and 5-10 sows of the B variety with the weight of 300-500 kg for mating, and breeding 5-10 sows of the D variety, and mating 5-10 pigs of the D variety with the weight of 100-200 kg and 5-10 boars of the C variety with the weight of 400-500 kg when the age of the D variety reaches 10-12 months and the weight of 100-200 kg, so as to breed the E variety.
S4, device fabrication
The method comprises the steps of firstly opening a water bath kettle, setting the temperature of the water bath kettle to be 33-36 ℃, ensuring that the water temperature is kept at 33-36 ℃ all the time, then adding diluent powder into a beaker, adding 800-1000 ml of water with the temperature of 10-25 ℃ into the beaker, fully stirring the diluent powder by a stirring rod for 1-3 minutes, placing the stirred diluent on the water bath kettle, heating the diluent to enable the temperature of the diluent to be 33-36 ℃, then sleeving a semen taking bag on the inner wall of a constant temperature cup, folding the semen taking paper by the semen filtering paper, placing the semen taking paper into the constant temperature cup, enabling the semen filtering paper to be in a funnel shape, tightening the outer wall of the constant temperature cup by a rubber band, and fixing the semen filtering paper and the semen taking bag.
S5, raw material extraction
Extracting the semen of the E-grade boar obtained in the step S3, extracting the semen in a constant-temperature cup prepared in the step S4 to extract 150-160 ml of semen, adding diluent with the temperature of 33-36 ℃ obtained in the step S4 into the semen, fully stirring for 1-3 minutes, sucking a little mixed semen through a suction pipe, placing the mixed semen on a glass slide, placing the glass slide under a microscope to see whether the activity and the density of the semen are qualified, pouring the diluted qualified semen into a storage bottle, sending out redundant air in the bottle, and screwing down a bottle cap to obtain 3-6 bottles of qualified semen.
S6, use of raw materials
And (4) putting 3-6 bottles of qualified semen obtained in the step S5 into a constant temperature box, setting the temperature in the constant temperature box to be kept at 16-18 ℃ all the time, and then respectively using 3-6 bottles of qualified semen on 3-6 pigs of B variety.
Preferably, in the step S1, the teats of the B-breed sows should be observed and the size and distribution of the teats should be uniform.
Preferably, in step S1, the testes of the boar of breed C need to be examined when the boar is selected, and the boar is symmetrical at both sides, fat and full, and elastic when touched by hands.
Preferably, in the step S2, when the fence management is required, the inside of the circle needs to be cleaned and sterilized in advance, and the humidity inside the circle needs to reach 2 to 5%.
Preferably, in the step S3, vitamin E60-120 g is fed to the breeding boars of the breed A with the weight of 300-500 kg and the breeding sows of the breed B with the weight of 300-500 kg 3-6 days before mating.
Preferably, in step S4, the water bath needs to be sterilized in a sterilization chamber for 1-2 hours before use, and kept in a dry state all the time.
Preferably, in the step S4, the diameter of the filter paper is 2-5 cm, and the diameter of the filter screen is 2-5 mm.
Preferably, in step S6, the oven needs to be cleaned before use, so that the interior of the oven is in a dust-free and pollution-free environment.
(III) advantageous effects
Compared with the prior art, the invention provides a method for hybridization and purification of the native black pigs, which has the following beneficial effects:
1. according to the method for hybridization and purification of the local black pigs, the D-breed sows produced by the A-breed boars and the B-breed sows are hybridized with the C-breed boars, so that the immune bodies of the pigs are improved, the finally obtained pig breeds are excellent in meat quality, tender and juicy in muscle, fine in muscle fiber, high in density, moderate in muscle marbling distribution, full of fat particles among the muscle fibers, and capable of generating special fragrance during cooking, so that healthy pork can be influenced more, and good living conditions are achieved.
2. The method for hybridization and purification of the native black pigs extracts and filters the semen of the pig of the E variety, can well filter magazines in the semen of the pig of the E variety, can also extract and observe the semen, can be used only when the activity and the density of the semen are qualified, further improves the farrowing capacity of the pig variety to a certain extent, improves the yield of the pig, enables merchants for raising the pig to obtain good economic benefits, improves the pig variety, and enables the pig variety to grow better.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a method for hybridization purification of a native black pig comprises the following steps:
s1, selecting boars
Selecting 5 boars of the A variety with the weight of 300 kg according to the body appearance, wherein the appearance is characterized in that the body muscles are full and firm, the chest is wide and deep, the back and the waist are flat or slightly arched and wide, and the ribs are round and arched; the developed skin of the rear trunk and the developed hip is bright and smooth, the boar of the A breed is a black pig, 5 sows of the B breed with the weight of 300 kg are selected, the sows of the B breed are selected to be the female parents of the boars which are widely distributed locally, the reproductive performance of the female parents is good, the oestrus symptom is obvious, the nipples of the sows of the B breed need to be observed when the sows of the B breed are selected, the sizes and the distribution of the nipples are uniform, 5 boars of the C breed with the weight of 400 kg are selected, the boars of the C breed are landrace, the testes of the boars of the C breed need to be checked when the boars of the C breed are selected, the two sides of the boars are symmetrical and are full, and the boars are elastic when the boars are touched by hands.
S2, feeding boars
Selecting 5A breed boars with the weight of 300 kg, 5B breed boars with the weight of 300 kg and C breed boars 10 with the weight of 400 kg in the step S1 to perform fence management, preferably feeding 3 boars in each fence, cleaning and sterilizing the inner space of the fence in advance when the fence management is required, keeping the humidity in the fence to be 2%, keeping the inner space dry and sanitary, keeping the temperature in the fence at 18 ℃ all the time, sterilizing and sterilizing the inner space of the fence every 1-3 days, adding a proper amount of medicine into food after feeding for 3 days to prevent and treat diseases of digestive tract, respiratory tract and the like, inoculating vaccines to the boars after feeding for 6 days, manually observing for 3 hours, and adding a proper amount of antibiotic to improve the immunity if pathological reaction occurs.
S3 hybridization of breeding pigs
After feeding the breeding pigs for 30 days, 5 boars of the A variety with the weight of 300 kg and 5 sows of the B variety with the weight of 300 kg are selected to mate, 5-10 boars of the A variety with the weight of 300 kg and 5 sows of the B variety with the weight of 300 kg need to be fed with 60 g of vitamin E3 days before mating, 5 sows of the D variety are produced, when the age of the pigs of the D variety reaches 10 and the weight of the pigs is 100 kg, the 5 pigs of the D variety with the weight of 100 kg and 5 boars of the C variety with the weight of 400 kg are mated, and the pigs of the E variety are produced.
S4, device fabrication
Firstly, opening a water bath kettle, placing the water bath kettle in a disinfection chamber for disinfection for 1 hour before use, keeping the water bath kettle in a dry state all the time, setting the temperature of the water bath kettle to be 33 ℃, ensuring the water temperature to be 33 ℃ all the time, then adding diluent powder into a beaker, adding water with the temperature of 10 ℃ of 800 milliliters into the beaker, fully stirring the water by a stirring rod for 1 minute, placing the stirred diluent on the water bath kettle, heating the diluent to ensure the temperature of the diluent to be 33 ℃, then sleeving a semen taking bag on the inner wall of a constant temperature cup, folding the semen taking bag by semen filter paper, wherein the diameter of the filter paper is 2 centimeters, the diameter of a filter screen of the filter paper is 2 millimeters, placing the filter paper into the constant temperature cup to enable the semen filter paper to be in a funnel shape, and then using a rubber band to tighten the outer wall of the constant temperature cup, and fixing the semen filter paper and the menstrual blood taking bag.
S5, raw material extraction
Extracting the semen of the E-grade boar obtained in the step S3, extracting the semen in a constant-temperature cup prepared in the step S4 to extract 150 ml of semen, adding the diluent with the temperature of 33 ℃ obtained in the step S4 into the semen, fully stirring for 1 minute, sucking a little mixed semen through a suction pipe, placing the mixed semen on a glass slide, observing whether the activity and the density of the semen are qualified or not under a microscope, pouring the diluted qualified semen into a storage bottle, sending out redundant air in the bottle, and screwing down a bottle cap to obtain 3 bottles of qualified semen.
S6, use of raw materials
And (3) putting the 3 bottles of qualified semen obtained in the step S5 into an incubator, cleaning the incubator before use to enable the interior of the incubator to be in a dust-free and pollution-free environment, setting the temperature inside the incubator to be kept at 16 ℃ all the time, and then respectively using the 3 bottles on 3 pigs of B variety to finally produce the pigs of very good variety.
Example two:
a method for hybridization purification of a native black pig comprises the following steps:
s1, selecting boars
Selecting 10 boars of A variety with the weight of 500 kg according to the body appearance, wherein the appearance is characterized in that body muscles are full and firm, the chest is wide and deep, the back and the waist are flat or slightly arched and wide, and ribs are round and arched; the developed skin of the rear trunk and the developed hip is bright and smooth, the boar of the A breed is a black pig, 10 sows of the B breed with the weight of 500 kg are selected, the sows of the B breed are selected to be the female parents of the boars which are widely distributed locally, the reproductive performance of the female parents is good, the oestrus symptom is obvious, the nipples of the sows of the B breed need to be observed when the sows of the B breed are selected, the sizes and the distribution of the nipples are uniform, 10 boars of the C breed with the weight of 500 kg are selected, the boars of the C breed are the Landerris pig, the testes of the boars of the C breed need to be checked when the boars of the C breed are selected, the two sides of the boars are symmetrical, the boars are full and are elastic when the boars are touched by hands. .
S2, feeding boars
Selecting 10 pigs of A variety with the weight of 500 kg, 10 pigs of B variety with the weight of 500 kg and 15 pigs of C variety with the weight of 500 kg in the step S1 to be subjected to fence management, cleaning and performing virus killing treatment in advance when the fence management needs to be performed, wherein the humidity in a fence needs to reach 5%, 6 pigs in each fence are preferably raised, the fence is kept dry and sanitary, the temperature in the fence is always kept at 20 ℃, the fence is sterilized and disinfected every 3 days, after 5 days of feeding, a proper amount of medicine can be added into food to prevent and treat diseases of digestive tract, respiratory tract and the like, after 10 days of feeding, the pigs are inoculated with vaccine, and manually observed for 5 hours, if pathological reaction occurs, a proper amount of antibiotic can be added to improve the immunity.
S3 hybridization of breeding pigs
After the breeding pigs are fed for 60 days, 10A-breed boars with the weight of 500 kg and 10B-breed sows with the weight of 500 kg are selected to mate, the 10A-breed boars with the weight of 500 kg and 10B-breed sows with the weight of 500 kg need to be fed with 120 g of vitamin E6 days before mating, 10D-breed sows are produced, when the age of the D-breed boars reaches 12 months and the weight of the D-breed sows is 200 kg, the 10D-breed pigs with the weight of 200 kg and 10C-breed boars with the weight of 500 kg are mated, and the E-breed boars are produced.
S4, device fabrication
Firstly, opening a water bath kettle, placing the water bath kettle in a disinfection chamber for disinfection for 2 hours before use, keeping the water bath kettle in a dry state all the time, setting the temperature of the water bath kettle to be 36 ℃ all the time, then adding diluent powder into a beaker, adding water with the temperature of 25 ℃ of 1000 milliliters into the beaker, fully stirring the water by a stirring rod for 3 minutes, placing the stirred diluent on the water bath kettle, heating the diluent to ensure that the temperature of the diluent is 36 ℃, then sleeving a semen taking bag on the inner wall of a constant temperature cup, folding the semen taking bag by using semen filter paper, wherein the diameter of the filter paper is 5 centimeters, the diameter of a filter screen of the filter paper is 5 millimeters, placing the filter paper into the constant temperature cup to ensure that the semen filter paper is in a funnel shape, and then using a rubber band to tighten the outer wall of the constant temperature cup, and fixing the semen filter paper and the menstrual blood taking bag.
S5, raw material extraction
Extracting the semen of the E-grade boar obtained in the step S3, extracting the semen in a constant-temperature cup prepared in the step S4 to extract 160 ml of semen, adding the diluent with the temperature of 36 ℃ obtained in the step S4 into the semen, fully stirring for 3 minutes, sucking a little mixed semen through a suction pipe, placing the mixed semen on a glass slide, observing whether the activity and the density of the semen are qualified or not under a microscope, pouring the diluted qualified semen into a storage bottle, sending out redundant air in the bottle, and screwing down a bottle cap to obtain 6 bottles of qualified semen.
S6, use of raw materials
And (4) putting the 6 bottles of qualified semen obtained in the step S5 into an incubator, cleaning the incubator before use to enable the interior of the incubator to be in a dust-free and pollution-free environment, setting the temperature inside the incubator to be always kept at 18 ℃, and then respectively using the 6 bottles on 6 pigs of B variety, so as to finally produce the pigs of very good variety.
The D variety sow produced by the A variety boar and the B variety sow is hybridized with the C variety boar, so that the immune body of the pig is improved, the finally obtained pig variety has excellent meat quality, tender and juicy muscle, thinner muscle fiber, higher density and moderate muscle marbling distribution, fat particles are filled among muscle fibers, and special flavor can be generated during cooking, so that healthy pork can be affected more, good living conditions are achieved, the extraction and filtration of the E-breed boar semen can well filter the magazines in the semen of the E-breed boar, and can also be used for extracting and observing semen so that the semen can be used only when the vitality and the density of the semen are qualified, and then the farrowing capacity of the pig seeds is improved to a certain extent, the pig yield is improved, a commercial tenant for raising pigs obtains good economic benefits, and the pig seeds are improved to better grow.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for hybridization purification of a native black pig is characterized by comprising the following steps:
s1, selecting boars
Selecting 5-10 boars of A variety with the weight of 300-500 kg according to the body appearance, wherein the appearance is characterized in that body muscles are full and firm, the chest is wide and deep, the back and the waist are flat or slightly arched and wide, and ribs are round and arched; the developed skin of the posterior trunk and the developed hip is bright and smooth, the boar of the A variety is a black pig, 5-10 sows of the B variety with the weight of 300-500 kg are selected, the sow of the B variety is selected from a variety with wide local distribution as a female parent, the reproductive performance of the female parent is good, the oestrus symptom is obvious, 5-10 boars of the C variety with the weight of 400-500 kg are selected, and the boar of the C variety is a Landerris pig variety.
S2, feeding boars
Selecting 5-10A breed boars with the weight of 300-500 kg, 5-10B breed sows with the weight of 300-500 kg and 10-15C breed boars with the weight of 400-500 kg in the step S1 to perform column management, feeding 3-6 boars in each column, keeping the temperature in the enclosure dry and sanitary, keeping the temperature in the enclosure at 18-20 ℃ all the time, sterilizing and disinfecting the enclosure every 1-3 days, adding a proper amount of medicine into food after feeding for 3-5 days to prevent and treat diseases of digestive tract, respiratory tract and the like, inoculating a vaccine to the boars after feeding for 6-10 days, manually observing for 3-5 hours, and adding a proper amount of antibiotic to improve the immunity if a pathological reaction occurs.
S3 hybridization of breeding pigs
After feeding the breeding pigs for 30-60 days, selecting 5-10 boars of the A variety with the weight of 300-500 kg and 5-10 sows of the B variety with the weight of 300-500 kg for mating, and breeding 5-10 sows of the D variety, and mating 5-10 pigs of the D variety with the weight of 100-200 kg and 5-10 boars of the C variety with the weight of 400-500 kg when the age of the D variety reaches 10-12 months and the weight of 100-200 kg, so as to breed the E variety.
S4, manufacturing device
The method comprises the steps of firstly opening a water bath kettle, setting the temperature of the water bath kettle to be 33-36 ℃, ensuring that the water temperature is kept at 33-36 ℃ all the time, then adding diluent powder into a beaker, adding 800-1000 ml of water with the temperature of 10-25 ℃ into the beaker, fully stirring the diluent powder by a stirring rod for 1-3 minutes, placing the stirred diluent on the water bath kettle, heating the diluent to enable the temperature of the diluent to be 33-36 ℃, then sleeving a semen taking bag on the inner wall of a constant temperature cup, folding the semen taking paper by the semen filtering paper, placing the semen taking paper into the constant temperature cup, enabling the semen filtering paper to be in a funnel shape, tightening the outer wall of the constant temperature cup by a rubber band, and fixing the semen filtering paper and the semen taking bag.
S5, raw material extraction
Extracting the semen of the E-grade boar obtained in the step S3, extracting the semen in a constant-temperature cup prepared in the step S4 to extract 150-160 ml of semen, adding diluent with the temperature of 33-36 ℃ obtained in the step S4 into the semen, fully stirring for 1-3 minutes, sucking a little mixed semen through a suction pipe, placing the mixed semen on a glass slide, placing the glass slide under a microscope to see whether the activity and the density of the semen are qualified, pouring the diluted qualified semen into a storage bottle, sending out redundant air in the bottle, and screwing down a bottle cap to obtain 3-6 bottles of qualified semen.
S6, use of raw materials
And (4) putting 3-6 bottles of qualified semen obtained in the step S5 into a constant temperature box, setting the temperature in the constant temperature box to be kept at 16-18 ℃ all the time, and then respectively using 3-6 bottles of qualified semen on 3-6 pigs of B variety.
2. The method as claimed in claim 1, wherein in step S1, the size and distribution of the teats of the sow of breed B are uniform and observed.
3. The method of claim 1, wherein in step S1, the boar of breed C needs to have testes inspected, and has symmetrical sides, is big and full, and is elastic when touched by hand.
4. The method of claim 1, wherein in step S2, when the pigsty needs to be managed, the inner space needs to be cleaned and sterilized in advance, and the humidity in the inner space needs to reach 2-5%.
5. The method for crossbreeding and purifying the local black pigs as claimed in claim 1, wherein in the step S3, 5-10 boars of breed A with the weight of 300-500 kg and 5-10 sows of breed B with the weight of 300-500 kg need to be fed with 60-120 g of vitamin E3-6 days before mating.
6. The method of claim 1, wherein the water bath is sterilized in a sterilization chamber for 1-2 hours and kept dry before use in step S4.
7. The method of claim 1, wherein in step S4, the filter paper has a diameter of 2-5 cm, and the filter net has a diameter of 2-5 mm.
8. The method of claim 1, wherein in step S6, the incubator is cleaned before use, so that the interior of the incubator is in a dust-free and pollution-free environment.
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