Breeding pigs are the basis for the proliferation of pigs and are the core of the entire pig production. Since the use of breeding pigs has a finite number of years, boars do not normally exceed 2 years in natural mating, sows do not exceed 8 litters, harvesting boars use 3 to 4 years, sows do not exceed 8 litters, and the breeding performance of individual pigs big difference. Therefore, only by implementing a scientific and reasonable breeding and renewal system for breeding pigs can we stabilize or increase the production level of breeding pigs and achieve the purpose of improving the economic efficiency of the farm. So, how to eliminate and renew breeders?
Calculate the relevant data for the elimination and update of breeding pigs
Take 100 basic sows as an example, the farm delivery index is 2.3, calculated as follows:
Boars: Under natural mating conditions, the ratio of males and females should not exceed 1:20. For 100 basic sows, the boar must be 100?=5 heads. The number of updates per year is 5 = 2.5 (ie 2 or 3 per year).
Sows: According to an effective life cycle of 8 fetuses, with an average annual output of 2.3 fetuses per sow, the average service life of sows is 8.3 = 3.48 ≈ 3.5 years. The annual elimination rate was 1.5%=28.6%≈30%.
The number of farms for 100 basic sows should be eliminated and the number of renewal should be 100 to 30. The number of heads to be eliminated and renewed per month should be 30 to 2.5. (If it is a large-scale farm, weekly elimination should also be calculated. The number of updates). According to the general principles for the elimination of breeding pigs, the above data is updated theoretically. The actual operation should be based on the following principles to eliminate and update breeding pigs.
The principle of eliminating sows
First, the elimination of age and weight has reached the breeding standards, but continue to raise 2 to 3 estrus after estrus.
Second, eliminate sows that are not estrus after 60 days after weaning.
3. Weed out sows that have returned 3 to 4 times continuously.
4. Weed out sows with less than 6 consecutive childbirths or fewer stillbirths and poor or poorly-divided sows.
5. Weeding out less than 6 pairs of nipples, abnormal development, sows with inverted titers or sucking tits or deputy nipples, and poor milking ability.
6. Weed out the sows with poor motherhood, viciousness, and low rate of rearing.
7. Weed out sows that are slow to eat, overweight and overweight, slow-moving, dull skin, and have no eyes.
VIII. Elimination of sows with deformed offspring.
Nine, eliminate sows that have diseases or disabilities, older age, and decreased performance.
The principle of elimination of boars
Generally, the elimination is based on the useful life, but boars that are bulky, poor in semen quality, poor in mating performance, and violent in temperament should be eliminated in time.
After the elimination of vacancies, they should be filled with ideal spare breeders at any time.
1. We have Good location
We`re located in the well known Ningbo International Port.
2. We`re Well-experienced
Tropical Group has many factories in the world, has 48 years experience in seafood export
3. We`re High quality assurance
Our company has passed HACCP, BRC, MSC, FDA, KOSHER and the other certifications.
4. We can do Best price
We are an industry and trade integration enterprise, which producing, packing and selling all by ourselves, greatly reducing the price difference caused by broker
5. We have Rich products
We have our own design department and R & D team, which can design personalized products according to customers' requirements.
6. We can do On-time delivery
Our products are exported to the United States, South America, Africa, Europe, Russia and other countries and regions. Company exports amounted to more than US$60 million in last year, enjoys high reputation in the aquatic products industry.
Contact: Ms. Sunny Wang
Fish Can,Saury Tinned,Saury In Tomato Sauce,Canned Saury In Tomato Sauce
Tropical Food Manufacturing (Ningbo) Co., Ltd. , https://www.tropical-food.com