CN111011298A - High-quality pork pig hybridization production method - Google Patents
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Abstract
The invention relates to a high-quality pork pig hybridization production method, which belongs to the field of animal genetic breeding, and is characterized in that a Duroc pig is taken as a male parent, a Guangdong auricle pig is taken as a female parent, a first-filial Duroc binary hybrid pig is taken as a female parent, and a Tibetan pig is taken as a male parent, and hybridization is carried out to obtain the high-quality pork pig, wherein the high-quality pork pig simultaneously inherits the excellent qualities of high growth speed and high feed utilization rate of American-line Duroc pigs, the Guangdong auricle pig is suitable for high-temperature and high-humidity environment, the fertility is strong, the lactation performance of sows is good, the utilization period is long, the Tibetan pig meat quality is excellent, and the like, and the high-quality pork pig has the following advantages as shown by tests on reproductive performance, growth performance, slaughter performance and: high reproductive capacity, large body size, fast growth and development, high feed utilization rate, high lean meat percentage, good meat quality, fresh and tender meat quality, unique flavor and suitability for popularization and feeding.
Description
Technical Field
The invention relates to a hybridization production method of a high-quality pork pig, belonging to the field of animal genetic breeding.
Background
Chinese local pig breeds have good meat quality, the intramuscular fat content is more than 3 percent and even reaches 6 to 7 percent, and foreign lean type pig breeds have high growth speed but poor meat quality. Duroc pigs are exotic varieties, are well known for high growth speed, high feed utilization rate and strong meat production performance, are main hybrid parents, especially terminal male parents, of commercial pigs produced by pig breeding in the world at present. At present, Duroc breeding pigs fed in China are mostly American lines and Taiwan lines, Duroc Taiwan lines have good body fullness, high lean meat percentage, poor reproductive performance and low growth speed; the American duroc has prominent reproductive performance and high growth speed, but has low lean meat percentage and insufficient fullness. The Tibetan pig is a typical plateau type pig breed in China, lives in an agricultural area with the altitude of 2500-4300 m and a semi-agricultural and semi-pastoral area of Qinghai-Tibet plateau, belongs to grazing and feeding of original lean-meat type miniature pig breeds, has strong adaptability to severe climate with high altitude, is disease-resistant and coarse-resistant, and is one of precious animal genetic resources in China. The Tibetan pigs have the characteristics of excellent meat quality, strong stress resistance and the like, but have the defects of moderate and lower fecundity, slow growth and development and the like. The Guangdong small eared pig is originally produced in the south of the West river of Guangdong province and in the west of Guangdong province, has small head shape and body size, is black and white by hair, is black and white by the head, ears, back, waist and hip, is white by the rest parts, has the excellent characteristics of high-temperature and high-humidity environment adaptation, coarse feeding resistance, precocity, easy fattening, thin skin, tender meat, delicious meat taste, mild female sex, strong fertility, obvious oestrus symptoms, good lactation performance of sows, long utilization years and the like, is one of local pig breeds with the largest feeding amount in Guangdong province, and has the characteristics of low slaughter rate, thick back fat, low lean meat rate and the like.
Currently, the general trend of pig breeding and pig production development is to perform comprehensive matching hybridization among multiple lines according to the principle of heterosis and character complementation to produce high-efficiency and high-quality commercial lean pork pigs, and the high-genetic quality pig is a material basis and a technical carrier for implementing pig breeding and industrialization. At present, the production level of commercial pigs in China has a large gap with the advanced level of the world.
China is the first country for pig breeding and pork consumption. With the development of social economy and the continuous improvement of living standard, people put forward the requirements of high lean meat percentage, good taste and good flavor to commercial pork pigs. Therefore, how to breed the fattening pigs with the characteristics of high growth speed, good meat quality and the like becomes a problem of important consideration for the development of the domestic pig industry.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a high-quality pork pig hybridization production method, and the bred high-quality pork pig has the advantages of high reproductive capacity, large size, fast growth and development, high feed utilization rate, high lean meat rate, good meat quality, fresh and tender meat and unique flavor.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hybridization production method of high-quality pork pigs comprises the following steps:
s1, hybridizing the physically healthy Duroc pigs serving as male parents and the physically healthy Guangdong small eared pigs serving as female parents, and selectively breeding duhua binary hybrid pigs;
s2, hybridizing the Tibetan pig with healthy physique as a male parent and the Duhua binary pig with healthy physique in the step S1 as a female parent, and selectively breeding a Tibetan Duhua ternary hybrid pig;
and S3, carrying out transverse mating and fixing on the Tibetan Duhua three-way hybrid pig with the healthy constitution in the step S2 to obtain a high-quality pork pig.
The growth speed of the American-system Duroc pigs is high, the utilization rate of the feed is high, but the meat quality is poor; the meat quality of the Tibetan pigs is good, but the growth is slow; the Guangdong small eared pig adapts to the environment of high temperature and dampness, has strong fecundity, good lactation performance of the sow and long service life, but has low dressing percentage, thick backfat and low lean meat percentage, which causes bad meat quality and flavor. Aiming at the current situation, the first-filial generation of the duico binary hybrid pig is obtained by hybridizing the duico pig serving as a male parent and the Guangdong small eared pig serving as a female parent, the growth speed of the duico pig can be inherited simultaneously, the feed utilization rate is high, the Guangdong small eared pig is suitable for a high-temperature and high-humidity environment, the fertility is strong, the lactation performance of the sow is good, the utilization year limit is long and other excellent qualities are achieved; and hybridizing the first-filial generation of the Duhua binary hybrid pig serving as a female parent and the Tibetan pig serving as a male parent to obtain the high-quality pork pig, wherein the high-quality pork pig inherits the excellent quality of the meat of the Tibetan pig on the basis of inheriting the excellent quality of the Duroc pig and the Guangdong auricle pig.
Preferably, the duroc pig is a duroc american pig, and the duroc american pig is a duroc new-american pig. The Duroc pig of the New American line is a result of the American first-class breeding experts for insisting on breeding pigs for a long time, and the father line has the characteristics of long and thin body, uniform fullness, low gravity center, short limbs, high dressing percentage, uniform lean meat distribution and the like; the mother line focuses on the balance between growth, reproduction and meat quality.
Preferably, the crossing means is either natural mating or artificial insemination.
Preferably, the Duroc pigs, the Guangdong auricle pigs and the Tibetan pigs are all breeding pigs which have pure genes, do not have halothane genes, have strong physique and good development.
The term "crossing" as used herein refers to a first-filial generation of pig breeds obtained by a first mating of two different parents; the cross-breeding is a process of obtaining a first generation of a father line and a second generation of a mother line through twice hybridization, and then mating a boar in the first generation of the father line with a sow in the second generation of the mother line to obtain a special generation of a pig, namely in cross breeding, after the breeding reaches a specified standard, the crossbreeding is not carried out, but the crossbreeding is carried out between filial generations, so that the inferior character is eliminated, the excellent character is purified and consolidated, and finally the breeding of a new variety is achieved.
Preferably, the Duroc boars selected in step S1 have a lean meat percentage of more than 64.22% for a day of age of less than 165 days when reaching 100kg weight.
Preferably, the breeding of the eurotium kwangtungense pigs in the step S1 is as follows: the Guangdong small eared boar and the Guangdong small eared sow are assembled into a breeding basic group, the conventional breeding means is adopted for seed selection and matching, the small eared sow which is mild in maternal property, strong in reproductive capacity, obvious in oestrous symptom, good in lactation performance, pure in gene, free of halothane gene, strong in physique and good in development is selected for hybridization production through group subculture breeding, the selected small eared sow is good in reproductive organ, orderly in nipple arrangement, more than 6 effective nipples and not less than 12 in number born.
Preferably, in step S2, the breeding of the Tibetan boar is: the method comprises the steps of establishing a breeding basic group of the Tibetan boars and sows, carrying out seed selection and matching by adopting a conventional breeding means, selecting the Tibetan boars which have excellent meat quality, pure genes, no halothane genes, strong physique and good development through group subculture breeding, and using the selected Tibetan boars in hybridization production, wherein the lean meat percentage of the selected Tibetan boars is more than 60.28%.
Preferably, the breeding method of the breeding boars, the breeding sows and the piglets comprises the following steps: breeding boars and breeding sows are fed in circles one by one, the boars and the sows are fed with commercial boar feed and commercial sow feed, three meals are eaten in one day, the boars are fed with free food and drinking water, the boars are often placed in a playground for increasing exercise, normal breeding and ovulation and fertilization are guaranteed, and vigorous boars which climb across the sows more than 3 times a day and sows with oestrus times more than 1 are respectively selected for breeding.
Preferably, the sows are bred in different pens after successful breeding, 1 sow in each pen starts to prepare for delivery work 1 week before the expected delivery period, the breeding management of the sows after breeding is carried out in the gestation period and the lactation period, the conventional corn-soybean meal type diet is adopted to respectively feed commercial pregnant sow feed and lactating piglet feed, three meals a day are carried out, the conventional breeding management work such as immunization, health care, medication and the like is carried out regularly, piglets are bred in a single pen together with the sows before weaning, and piglets after weaning are bred in different pens.
Preferably, during the raising period, the pig performs in-vivo and in-vitro parasite expelling and purification; keeping the colony house clean and sanitary, regularly cleaning the pig manure in the pig house, flushing the colony house for 1 time every day, and spraying hypochlorous acid for disinfection; sterilizing the outside of the colony house with disinfectant powder for 1 time every day, and washing the colony house with caustic soda for 1 time every week; expelling insects to breeding herds 2 times per year; the vaccine immunization is carried out on the pig farm in spring and autumn every year, and the vaccine is injected.
Compared with the prior art, the invention has the beneficial effects that:
the method takes Duroc as a male parent and Guangdong small eared pig as a female parent, obtains a first-filial generation Duhua binary hybrid pig by hybridization, then takes the first-filial generation Duhua binary hybrid pig as the female parent and Tibet pig as the male parent, and finally obtains a high-quality pork pig by hybridization, and tests on reproductive performance, growth performance, slaughtering performance and meat quality performance show that the improved high-quality pork pig has the following advantages: high reproductive capacity, large body size, fast growth and development, high feed utilization rate, high lean meat percentage, good meat quality, fresh and tender meat quality, unique flavor and suitability for popularization and feeding.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A hybridization production method of high-quality pork pigs comprises the following steps:
s1, preparation work before hybridization production: (1) cultivation of duroc boars: 8 Duroc boars and 40 sows are introduced, a breeding basic group is established, a conventional breeding means is adopted for seed selection and matching, the Duroc boars which have high lean meat percentage, high growth speed, good meat quality, pure genes, no fluorine alkyl cause, strong physique and good development are selected for hybridization production through group subculture, the day age of the selected Duroc boars reaching 100kg weight is less than 165 days, and the lean meat percentage is more than 64.22%; (2) and (3) breeding of the Guangdong small eared pigs: 8 Guangdong auricularia auricula-judae boars and 40 sows are introduced to establish a breeding basic group, a conventional breeding means is adopted for seed selection and matching, and the auricularia auricula-judae sows which are mild in maternal property, strong in fertility, obvious in oestrous symptom, good in lactation performance, pure in gene, free of halothane gene, strong in physique and good in development are selected for hybridization production through group subculture breeding, the selected auricularia auricula sows are good in reproductive organs, regular in nipple arrangement, more than 6 pairs of effective nipples, and not less than 12 in number of born; (3) breeding the Tibetan boar: introducing 8 Tibetan boars and 40 sows, establishing a breeding basic group, adopting a conventional breeding means to select seeds and match, and selecting the Tibetan boars which have excellent meat quality, pure genes, no halothane genes, strong physique and good development for hybridization production through group subculture, wherein the lean meat percentage of the selected Tibetan boars is more than 60.28%;
s2, hybridizing the American duroc boar with healthy physique in the step S1 as a male parent and the Guangdong small eared sow with healthy physique as a female parent in a natural mating mode, and selectively breeding a duhua binary hybrid pig;
s3, hybridizing the Tibetan Duhua binary pig with healthy physique in the step S1 as a male parent and the Duhua binary sow with healthy physique in the step S2 as a female parent in a natural mating mode, and breeding a Tibetan Duhua ternary hybrid pig;
and S4, carrying out transverse mating and fixing on the Tibetan Duhua three-way hybrid pig with the healthy constitution in the step S2 to obtain a high-quality pork pig.
In this embodiment, the breeding boars, breeding sows and piglets are specifically raised by the following raising methods:
breeding boars and breeding sows are fed in circles one by one, the commercial boar feed and the commercial sow feed are fed respectively according to the pig nutrition requirements recommended by NY/T65-2004 by the feeding feed, three meals a day are provided, the boars are fed with free food and drinking water, the boars are frequently put in a sports ground to increase exercise, normal breeding and ovulation fertilization are guaranteed, and the boars which climb across the sows more than 3 times a day and have vigorous sexual desire and the sows which have oestrus more than 1 times are selected respectively for breeding.
After the successful mating of the sows, the sows are fed in different pens, 1 sow is fed in each pen, and the preparation for delivery work is started 1 week before the expected delivery period. The breeding management of the sows after mating is carried out in the gestation period and the lactation period, the feeding feed is based on the pig nutrition requirement recommended by NY/T65-2004, the conventional corn-soybean meal type feed is adopted to respectively feed commercial pregnant sow feed and suckling piglet feed, three meals a day are carried out, and conventional breeding management work such as immunization, health care, medication and the like is carried out at regular intervals. The piglets are fed in a single circle together with the sows before weaning (weaning starts at 30 days), and the piglets are divided into circles after weaning (male and female are separated).
During the raising period, the pig carries out the insect expelling and purification of parasites in vivo and in vitro; keeping the colony house clean and sanitary, regularly cleaning the pig manure in the pig house, flushing the colony house for 1 time every day, and spraying hypochlorous acid for disinfection; sterilizing the outside of the colony house with disinfectant powder for 1 time every day, and washing the colony house with caustic soda for 1 time every week; expelling insects to breeding herds 2 times per year; the vaccine immunization is carried out on a pig farm in spring and autumn every year, and triple vaccines (swine erysipelas, swine plague and swine plague), porcine reproductive and respiratory syndrome, swine foot-and-mouth disease, pseudorabies and the like are injected.
And finally, breeding the obtained high-quality pork pig, and feeding the fattening pig with the commercial lean-type growing fattening pig feed according to the pig nutrition requirement recommended by NY/T65-2004, wherein the pork pig has three meals a day, and is fed freely and drunk.
Example 2
A hybridization production method of high-quality pork pigs comprises the following steps:
s1, preparation before hybridization production is the same as that of example 1;
s2, hybridizing the American duroc boar with healthy physique in the step S1 as a male parent and the Guangdong auricularia aurita sow with healthy physique as a female parent in an artificial insemination mode, and selectively breeding a duhua binary hybrid pig;
s3, hybridizing the Tibetan Duhua binary pig with healthy physique in the step S1 as a male parent and the Duhua binary sow with healthy physique in the step S2 as a female parent in an artificial insemination mode, and breeding a Tibetan Duhua ternary hybrid pig;
and S3, carrying out transverse mating and fixing on the Tibetan Duhua three-way hybrid pig with the healthy constitution in the step S2 to obtain a high-quality pork pig.
In this example, the breeding method of the breeding boars, the breeding sows and the piglets was the same as that in example 1.
Experimental example 1 reproductive performance test
The high quality pork pigs bred in example 1 and example 2 were subjected to pure breeding tests, and litter size were recorded, respectively, and the results are shown in table 1, using the pure breeding tests of the american duroc pigs, the tibetan pigs and the eurotium cantonensis pigs as controls.
As can be seen from the table 1, compared with the Duroc pigs and the Tibetan pigs in the American line, the litter size and the number of live litters of the high-quality pork pigs cultured by the invention are both obviously improved, the litter size is equivalent to that of the small eared pigs in Guangdong, but the number of live litters is improved; therefore, the high-quality pork pig bred by the breeding method has good reproductive performance.
TABLE 1 reproductive performance test results (mean + -SD)
Experimental example 2 growth Performance test
10 weaned piglets were selected from the high-quality pork pigs obtained in example 1 and example 2, and were housed in two groups, and were fed according to the conventional management standards, and the commercial lean-type growing-finishing pig feed was fed to the feed according to the pig nutritional requirements recommended by NY/T65-2004, three meals a day with free food and water, and the final body weights of the weaned duroc pigs, the tibetan pigs, and the cantonese auricles pigs were recorded after 6 months of feeding, and the daily weight gains [ (final body weight-initial body weight)/test days ] and the feed-weight ratio (average daily food intake/average daily weight) were recorded, as shown in table 2.
As can be seen from the table 2, compared with the Tibetan pigs and the Guangdong auricular pigs, the daily gain of the high-quality pork pigs cultured by the invention is obviously improved and is close to the daily gain speed of the Duroc pigs in the American system; meanwhile, the feed-weight ratio is obviously improved, the utilization rate of the feed is at the same level as that of the Duroc pigs in the American system, and therefore the high-quality pork pig bred by the invention has good growth performance, not only has high growth speed, but also has high utilization rate of the feed. In addition, the influence effect of natural mating and artificial insemination hybridization on the growth performance of the high-quality pork pig is not obvious.
TABLE 2 growth Performance test results (mean + -SD)
| Group of | Number of test heads | Final body weight (kg) | Daily gain (g) | Material to weight ratio |
| Example 1 high quality pork pig | 10 | 72.5±5.75 | 358.13±4.24 | 2.57±0.23 |
| Example 2 high quality pork pig | 10 | 73.1±5.58 | 361.52±4.71 | 2.61±0.34 |
| Duroc pig of American series | 10 | 109.3±6.27 | 552.34±4.62 | 2.53±0.25 |
| Tibetan pig | 10 | 45.1±4.53 | 211.67±3.73 | 4.57±0.23 |
| Cangdong small eared pig | 10 | 71.2±5.74 | 355.12±3.87 | 3.1±0.27 |
Experimental example 2 slaughter Performance test and meat Performance test
High-quality hogs were subjected to a feeding trial according to the feeding schedule of Experimental example 2, slaughter and carcass division were carried out according to the method described in the technical Specification for measuring carcass traits of lean hogs (NY/T825-2004), and indices such as pre-carcass weight, pre-carcass lean meat percentage, mid-carcass lean meat percentage, post-carcass lean meat percentage, total lean meat percentage, skin percentage, fat percentage, bone percentage, and lard weight (weight of abdominal lard tissue) were mainly measured and calculated, and the results are shown in Table 3. Meanwhile, indexes such as meat color score, marbling, shearing force, cooked meat rate and the like were measured according to the method described in technical Specification for measuring muscle quality of swine (NY/T821-2004), and the results are shown in Table 4.
As can be seen from table 3, the slaughter performance indexes such as weight, total lean meat percentage, skin percentage, fat percentage, bone percentage, leaf fat weight and the like of the high-quality pork pigs bred by the method are improved and the slaughter performance is good compared with the meat quality of the Tibetan pigs, the eurotium cristatum pigs and the american duroc pigs, because the meat quality of the duroc pigs, the eurotium cristatum pigs and the Tibetan pigs is good.
As can be seen from table 4, compared with the tibetan pig, the pork color score of the high-quality pork pig bred by the invention is significantly improved (3 points are the best pork color), and is slightly better than that of the american duroc pig and the eurotium cantoniensis; compared with the American Duroc pigs and Tibetan pigs, the marbling score (the total score is 5, the higher the marbling score is, the better the marbling score is) of the high-quality pork pigs cultured by the method is obviously improved and is slightly better than that of the Guangdong small eared pigs; compared with the Duroc pigs and Tibetan pigs in the American line, the high-quality pork pigs bred by the invention have obviously reduced shearing force, but are lower than that of the auricle pigs in Guangdong; compared with the American Duroc pigs and the Tibetan pigs, the intramuscular fat content of the high-quality pork pigs bred by the invention is obviously improved, but is lower than that of the Cantonese auricle pigs; therefore, the high-quality pork pig bred by the method has good meat quality, better meat color and remarkably reduced shearing force, and the marbling score and the intramuscular fat content are improved, so that the high-quality pork pig has better flavor and mouthfeel.
TABLE 3 slaughter Performance test results (mean + -SD)
TABLE 4 meat quality test results (mean + -SD)
Experimental examples 1-3 show that the high-quality pork pig inherits the excellent qualities of high growth speed and high feed utilization rate of the Duroc pig in the American line, the Guangdong auricle pig is suitable for high-temperature and high-humidity environment, the fertility is strong, the lactation performance of the sow is good, the utilization period is long, the meat quality of the Tibetan pig is excellent, and the like, and has the following advantages: high reproduction capacity, large body size, rapid growth and development, high feed utilization rate, high lean meat percentage, good meat quality, fresh and tender meat quality, and unique flavor.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. A hybridization production method of high-quality pork pigs is characterized by comprising the following steps:
s1, hybridizing the physically healthy Duroc pigs serving as male parents and the physically healthy Guangdong small eared pigs serving as female parents, and selectively breeding duhua binary hybrid pigs;
s2, hybridizing the Tibetan pig with healthy physique as a male parent and the Duhua binary pig with healthy physique in the step S1 as a female parent, and selectively breeding a Tibetan Duhua ternary hybrid pig;
and S3, carrying out transverse mating of the Tibetan Duhua three-way hybrid pig with healthy physique in the step S2 to obtain a high-quality pork pig.
2. The hybrid production method of high-quality pork pig as claimed in claim 1, wherein said Duroc pig is a Duroc US-system.
3. The method for producing a high-quality pork pig by crossing according to claim 1, wherein the crossing is either natural mating or artificial insemination.
4. The hybrid production method of high-quality pork pigs according to claim 1, wherein the duroc pigs, the eurotium cantonensis pigs and the Tibetan pigs are all breeding pigs which have pure genes, no halothane genes, strong physique and good development.
5. The method of claim 1, wherein the Duroc boars selected in step S1 have a lean meat percentage of 64.22% and a daily age of 100kg weight of less than 165 days.
6. The method for producing high-quality pork pig by hybridization according to claim 1, wherein the cultivation of the Pleurotus cantonensis pig in step S1 is: the Guangdong small eared boar and the Guangdong small eared sow are assembled into a breeding basic group, the conventional breeding means is adopted for seed selection and matching, the small eared sow which is mild in maternal property, strong in reproductive capacity, obvious in oestrous symptom, good in lactation performance, pure in gene, free of halothane gene, strong in physique and good in development is selected for hybridization production through group subculture breeding, the selected small eared sow is good in reproductive organ, orderly in nipple arrangement, more than 6 effective nipples and not less than 12 in number born.
7. The method for producing high-quality meat pigs by hybridization according to claim 1, wherein in step S2, the breeding of the Tibetan boar is: the method comprises the steps of establishing a breeding basic group of the Tibetan boars and sows, carrying out seed selection and matching by adopting a conventional breeding means, selecting the Tibetan boars which have excellent meat quality, pure genes, no halothane genes, strong physique and good development through group subculture breeding, and using the selected Tibetan boars in hybridization production, wherein the lean meat percentage of the selected Tibetan boars is more than 60.28%.
8. The hybrid production method of high-quality pork pigs as claimed in claim 1, wherein the breeding method of breeding boars, breeding sows and piglets comprises the following steps: breeding boars and breeding sows are fed in circles one by one, the boars and the sows are fed with commercial boar feed and commercial sow feed, three meals are eaten in one day, the boars are fed with free food and drinking water, the boars are often placed in a playground for increasing exercise, normal breeding and ovulation and fertilization are guaranteed, and vigorous boars which climb across the sows more than 3 times a day and sows with oestrus times more than 1 are respectively selected for breeding.
9. The method as claimed in claim 8, wherein the sows are bred in different pens after successful breeding, 1 sow is bred in each pen, the delivery work is prepared from 1 week before the expected delivery period, the breeding management after the breeding of the sows is carried out in the gestation period and the lactation period, the commercially available pregnant sow feed and lactating piglet feed are respectively fed by adopting the traditional corn-soybean meal type feed, three meals a day are carried out, the conventional breeding management work such as immunization, health care, medication and the like is carried out regularly, the piglets are bred in a single pen together with the sows before weaning, and the piglets are bred in different pens after weaning.
10. A method of cross breeding high quality porkers according to claim 8 or 9 wherein during the breeding period, the porkers are subjected to in vivo and in vitro parasite expelling and cleaning; keeping the colony house clean and sanitary, regularly cleaning the pig manure in the pig house, flushing the colony house for 1 time every day, and spraying hypochlorous acid for disinfection; sterilizing the outside of the colony house with disinfectant powder for 1 time every day, and washing the colony house with caustic soda for 1 time every week; expelling insects to breeding herds 2 times per year; the vaccine immunization is carried out on the pig farm in spring and autumn every year, and the vaccine is injected.
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