Comprehensive breeding technique for sows with multiple litters
First, choose a sow
The gilts should be selected from the progeny of the high-yielding sows, and choose healthy, well-balanced body, moderate temperament, tidy and evenly spaced nipples, more than 14 teats, long ears, large and blunt, straight back and abdomen. Large but not mowed sows used for planting, when the weight reached 80 to 90 kilograms, then select the fast growth, good shape, well-proportioned development, in line with species standards, in the maturing season normal estrus for seeding.
Second, master the initial match age and useful life
The initial age of the sow should not be too early. The early stage of the sow not only affects the physical development, but also has fewer litter size and poor physical fitness. In general, sows of local breeds start breeding at 6 to 7 months of age and 60 kg or more in weight. Sows introduced at 8 to 10 months of age, and bred at 100 to 120 kg; sows use for 5 to 7 years Should be eliminated in time.
Third, a reasonable arrangement of breeding season
The initial sows should be arranged for breeding in April-May, and calving from August to September; breeding from September to October, littering from January to February in the second year, breeding in February and March, littering in June and July, This arrangement allows the sow to breed a litter in the season of high reproductive activity.
Fourth, control of public opinion
Before the mating, the pupa is controlled at 7-80%, so that the fertility rate is high and the litter size is higher.
V. Short-term excellent feeding
Increasing the feed intake of the sow 10 to 14 days prior to breeding can stimulate multiple ovulation and multiple litters in the sow; it can be promptly reduced to normal level after mating, and feeds rich in vitamin A can be fed at the same time.
Six, timely breeding
Local sows are bred on the second or later day of estrus. Introduced cultivars and cultivars can be bred on the afternoon of the same day or the following morning. According to the sow's age, the old sow should be followed, and the young should not be too late. "the rules.
Seven, pay attention to the matching of male and female pigs
The general principle is: "excellent boar with excellent sows, excellent boar with normal sow"; in terms of age, "old boar with young sows, young boar with old sow The principle of a prime boar for the prime boar is the same.
Eight, increase ovulation
Intramuscular injection of 500-1500 IU maternal serum gonadotropins during estrus can increase ovulation, increase conception rate, and increase litter size.
Nine, strengthen the feeding and management of pregnant sows
Feeding protein- and vitamin-rich feeds early in pregnancy, matching green feeds appropriately, diversifying feeds to meet sow nutritional needs, and preventing abortions caused by falls, fights, etc.; , Appropriate exercise to prevent excessive fat; 3 months after pregnancy, appropriate increase in fine material, reduce coarse material and make up for calcium and phosphorus, appropriate pre-production materials.
Tiamulin Fumarate,Tiamulin Swine,Tiamulin Chicken,Tiamulin For Animal Use
Shandong Shengli Bioengineering Co., Ltd , https://www.shenglipharm.com