We use the ratio of raising pigs as a fraction. The "molecules" above are fattening pigs that can be sold directly to make money, and the "denominator" below is the breeding sow that breeds pigs. “The denominator†is the cost, the cost does not change much, and the more the number of births and survivals of the “moleculeâ€, the more money it makes.
The actual life of finishing pigs is approximately 260 days, including 114 days of fetal period, 28 days of lactation, and 130 days of growing-finishing. It can be seen that the first half of finishing pigs depend on sows, and the uniformity of birth determines the survival rate; Weight, weaning weight and health depend on the quantity and quality of breast milk, which determines the growth base of finishing pigs. The larger the base number, the faster the growth, the sooner you reach the slaughter weight, and the more you save money. Therefore, whether the pigs make money or not is really the most important one that depends on the breeding efficiency of sows.
Pigs have dialectics, pigs have art, and pigs have relaxation. A one-cycle market for pigs should not exceed 1,000 days, and should be opened during peak periods to seize opportunities and make more money. During the trough, it is necessary to relax, to contract and adjust production, to learn and implement the improvement of breeding efficiency of sows, and to increase the contribution rate of sow's weaned pigs.
The average number of weaned pigs per sow = average number of births per child, number of weaned pigs.
The average number of births per sow = (365 - year non-production day) sow production cycle. That is, the average number of weaned pigs in sows per year = [(365-year non-production day) sow production cycle] the number of weaned pigs.
If a production cycle = pregnancy time + lactation time = 114+28 = 142 days.
Average number of weaned live pigs = 9 heads.
Sows reproductive efficiency = [(365 ? average annual non-production date) 142] 9.
Therefore, in a self-breeding farm, the key to controlling the breeding efficiency of sows is the interval between each effective production cycle (pregnancy time + lactation time) of the sow, and this interval is called the sow's Non-production day (NPD). So, how to increase the reproductive efficiency of sows? How to tap the potential of pig farms to make money? The most effective way is to reduce the non-productive days of sows.
Sow's non-production day concept
The sows’ non-production days include the pre-breeding and post-breeding parts. The pre-breeding part includes the time interval between weaning and mating of sows (usually 4 days to 7 days, which is theoretically permitted), the time interval after weaning without breeding, and death after weaning without breeding. Intervals, as well as the interval between the selection of the first-born pigs and their breeding. The part of the breeding includes the time interval from breeding to returning, mating to abortion, mating to elimination, mating to death, and mating to childbirth.
For example, in a farm with 100 sows, the average non-productive date (NPD) of each sow is 70 days. Since one production cycle = 114 days (pregnancy time) + 28 days (lactation time) = 142 days, the sow's average annual parity = (365-70)/142 ≥ 2.08 fetuses.
If the average number of weaned pigs per week is calculated based on 9 heads, the number of total weaned pigs in the year is =1,002.089=1,872 heads, and the number of weaned pigs per sow (PSY) is 2.089=18.72 heads.
If we reduce the non-productive days (NPD) of each sow to 35 days, the average annual parity of the sow in this field = (365-35)/142 = 2.32, and the total number of weaned pigs in the year = 10,002.329 = In 2088 heads, the number of weaned pigs per year (PSY) = 2.329 = 20.88. Then we produced (2088-1872) = 216 weaned pigs throughout the year.
So, how did the sow's non-production day come about? Mainly in the following points, one is the abortion of sows, the second is the elimination and death of the sow caused by pre- and post-partum post-partum diseases, and the third is the sow's reproductive obstacles (false heat, no heat and repeated infertility, etc.). The following is a step-by-step analysis of the specific causes and solutions to the non-productive days.
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