Many companies put forward the slogan of "sows producing 30 heads per year is not a dream", if this slogan is said for individual sows with particularly good reproductive performance, I want to achieve an annual output of 30 heads is indeed not a dream, but if it is for the average production performance of a pig farm, it is difficult to say how many gimmicks there are, we will verify it through calculations.
Breeding calculations are made from the gilts in the most ideal state
First child: (mating delivery) [114 days] + breastfeeding [28 days] = 142 days
Second child: (weaning mating) [5 days] + gestation [114 days] + breastfeeding [28 days] = 147 days
Third child: (weaning mating) [5 days] + gestation [114 days] + breastfeeding [28 days] = 147 days
Fourth child: (weaning mating) [5 days] + gestation [114 days] + breastfeeding [28 days] = 147 days
Fifth child: (weaning mating) [5 days] + gestation [114 days] + breastfeeding [28 days] = 147 days
Sixth child: (weaning mating) [5 days] + gestation [114 days] + breastfeeding [28 days] = 147 days
Seventh fetus: (weaning mating) [5 days] + gestation [114 days] + breastfeeding [28 days] = 147 days
Eighth fetus: (weaning mating) [5 days] + gestation period [114 days] + breastfeeding [28 days] = 147 days
Total: 142 + 147×7 = 1171 days,
That is, 3.2 years of sows can give birth to 8 litters, an average of 2.5 births per year (8/3.2 = 2.5), which is often said to be two years to produce five litters.
According to the ideal situation, if the weaning is performed for 28 days, the sows need to produce 30 pigs per year, and the sows need to give birth to 12 piglets per litter!
If your farm fertility index is 2.2 births/year, if you want to reach an annual production of 30 pigs, the sow needs to give birth to 13.6 piglets per litter!
Ask yourself how many pig farms can achieve this average production rate!
Some people may say that our pig farm performs 21 days of weaning, so the weaning and breeding time must be calculated according to 7 days. Calculated according to the ideal situation, the birth index of the pig farm is 2.58 births per year. If you want to reach an annual sow production of 30 heads, you need to give birth to an average of 11.6 piglets per sow!
Through the above calculations, I think everyone has already figured out in their hearts whether the annual output of sows is a dream! (Source: Livestock)