Early weaning in piglets means that piglets are weaned from 2 to 6 weeks of age, and are known as super early weaning earlier than 2 weeks of age. At present, weaning is commonly used in 3-4 weeks of age. There is a precondition for adopting early weaning feeding methods for piglets to pass the quality of suckling pigs. At present, there are various kinds of feed market for suckling pigs on the market. Due to different feed formulation technology, raw material quality and cost control of different manufacturers, their feeding effects and costs vary. There should also be a good environment for piglet cultivation.
The advantages of early weaning in piglets include:
1. Improve the fertility of sows. First, understand the following three concepts: Sow reproductive cycle (days) = number of days of pregnancy + number of days of nursing + number of days from weaning to re-pregnancy Sow individual litter size = 365 days (number of days per year) / sow reproductive cycle ( Day) Average number of farrowing litters per sow = Total number of litters per year per year/Year average number of rearing sows The number of days of sow pregnancy is determined by the species characteristics of the pig (average 114 days). It is not based on people. Will change. The number of days of breastfeeding and the number of days from weaning to further pregnancies can be changed through breeding techniques. Sows have a short lactation period, less body weight loss and good body condition. The estrus after weaning is timely (usually about 7 days, range is 3-10 days), and the number of days until further pregnancy is short, thus shortening the breeding cycle of sows. , Raise the number of piglet pigs per year, from the conventional production of the 60-day-old weaning, the annual output of less than 2 litters, to the current use of 3-4 weeks old weaning of the annual output of 2? 2-2? 4 nests. Feeding lactating sows in traditional pig houses can also use piglet early weaning techniques. However, the lactation period is not as short as possible, because the uterus will take about one month to recover after giving birth to prepare for the next pregnancy; breastfeeding can stimulate early recovery of the uterus, premature weaning, and the postpartum reproductive tract The normal recovery is unfavorable, and a large number of trials and production practices have proved that sows are weaned at 3 to 4 weeks postpartum and have the highest fertility, followed by milk at 2 weeks and 5 weeks.
2, improve feed utilization. Sows feed on feed to produce milk and then use milk to feed piglets. Piglets use feed through two conversion processes. Their feed utilization rate is only about 20%. If the piglet feeds directly, the use of feedstuffs The rate is up to 50%, which improves the feed utilization of piglets. Although the price of milking pigs is relatively high, the amount of milk used is only 4 kg or less per head. The overall economic benefit is high, which is mainly reflected in: increased sow fertility, piglet feed utilization, piglets and Its subsequent growth rate and uniformity, column turnover rate, and so on.
3, is conducive to the cultivation of piglets. From the sow’s lactation patterns and the growth and development of the piglets, the sow’s lactation peaked at 3 weeks after delivery, and then gradually decreased. At this time, the growth and development of the piglets increased, and the milk could not meet the developmental needs. . At this time, weaning milk supplies the full-price milk-sweeping pigs needed to meet the growth and development of piglets, and at the same time provides suitable breeding environment for centralized feeding, which is conducive to promoting growth and disease control of piglets, reducing the proportion of weak piglets, and obtaining significant body weight and growth. Uniform piglets.
4. Improve the utilization of branch fences and equipment. Due to the short lactation period, the fast turnaround and high utilization rate of the tillers, and at the same time, due to the construction, equipment, and production operation (electricity) costs of the branch house, the proportion of the entire pig production is the largest and the utilization rate is increased. This also reduces the burden on the production infrastructure costs that are allocated to each pig.
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