Early weaning of piglets can save the cost of raising sows, increase the annual parity of sows, increase the utilization rate of delivery rooms, reduce the incidence of piglets infected with sows, and increase the feed intake of nursery pigs and reduce the incidence of yellow and white piglets. It is an effective measure to improve the economic benefits of raising pigs. However, because early weaning breaks the normal growth process of piglets, it will produce certain stress reactions, such as piglet diarrhea, growth retardation, and even death. Therefore, early weaning of piglets must be carried out scientifically.
First, strengthen the management of sows
1. Pre-pregnancy: This is a critical period for embryo implantation. If a large amount of high-energy and high-protein feed is consumed, the metabolism of the body will be strong, and the secretion of adrenal hormone will increase, which will affect the secretion of progesterone and cause embryo death. Therefore, this stage should be based on low-energy, low-protein feeds, while reducing various stresses.
2, the second trimester: this stage should be fed to the medium nutrient level of feed, otherwise it is easy to cause too much over-fertilization of the sow, long-term feeding may also cause anorexia and lactation in the lactating sow, thus affecting the subsequent fertility of the sow And piglets develop.
3, late pregnancy: At this stage, the weight gain of the fetus is very fast, it is necessary to feed the feed with high nutrient level, try to let the sow eat more. At the same time, it is necessary to ensure that the sow is cool, and the high temperature season can be divided into multiple meals, and the oil and electrolyte are appropriately added.
4. Lactation period: The sows gradually feed and feed the bran salt water or electrolyte water after the birth, and resume feeding after 3 days. Try to let the sows eat more and supply the clean drinking water. Conversely, it will cause a decrease in lactation, affecting the development of piglets, and at the same time leading to an increase in the estrus interval of piglets after weaning. However, from 7 days before weaning, the feed volume gradually decreased to 70%; after 4 days, it was reduced to 50%; the day before weaning was reduced to 25%; on the day of weaning, the sows were stopped feeding, only supply Clean the drinking water to prevent mastitis.
Second, the determination of weaning time
 Proper weaning time is the key to successful piglet weaning. Weaning time is too early and too late. Generally, the early weaning of piglets is 21-28 days old, because the digestive tract of piglets is basically developed, the secretion and activity of enzymes in the digestive tract are obviously improved, the digestion and absorption capacity is gradually enhanced, and the immune system has begun to produce antibodies. The sow's uterus has been largely restored. However, it should be based on different factors such as feeding conditions, feeding level, piglet health status and environmental conditions.
Third, piglet feeding management
1. Feeding early: After the piglets reach 2-4 weeks old, the nutrition provided by the mother's milk can no longer meet the growth needs. As piglets age, it is increasingly important to get nutrition from supplements. Feeding can prevent the intestinal villi from shortening and deepening the crypt, thereby improving the digestion and absorption rate of the piglets after weaning; promoting growth; promoting the secretion of trypsin in the small intestine, and improving the hydrolysis and digestion rate of protein in the feed. Into the large intestine, the amount of undigested protein is reduced, thereby reducing allergic diarrhea caused by indigestion.
2, choose the method of weaning: 3 days before weaning, give piglets Vc and oral saline solution to slow the weaning stress of piglets. Weaning should be carried out gradually, that is, the sows are gradually reduced in contact with piglets 5 days before weaning, the number of sucking of piglets is reduced, and the number of feedings of piglets is increased. Weaning of piglets is best done in the evening. Within four weeks after weaning, “four fixed†is achieved, that is, the pigs, pens, breeders, and feeds remain unchanged, and the sows are driven away from the piglets.
3, the control of the temperature inside the house: piglets 28-30 days old, the temperature should be controlled at 22-24 ° C, 30-60 days old is 20-22 ° C. The temperature in the winter house should be kept at least above 16 °C. The summer pig house should be cooled by installing a fan and a roof spray to maintain the optimum temperature for the piglets.
4. Reasonable grouping: After 1 week of weaning, the piglets are divided into groups according to the principle of male and female, size, strength, and eating speed.
Fourth, prevention of epidemic prevention
(1) Keep the pig house, utensils and environment clean and hygienic, and clean and disinfect regularly.
(2) Adopting a full-in, all-out system to prevent cross-infection of the disease.
(3) Sows were injected with K88 and K99 vaccines once every 2 weeks and 3 weeks before birth, piglets were injected with vaccination against pigs at 20 days of age, and vaccines were administered once at 28 days of age. According to the epidemic disease that has been popular, pseudorabies, streptococci, mycoplasma and so on.
(4) Pay attention to deworming: After the spirit and food intake of weaned piglets are normal, immediately deworming, using 0.6% ivermectin mixture to feed, 0.1 grams per kilogram of mixed medicine, for 5-6 days.
(5) According to the actual situation, selectively add preventive drugs to the feed, such as oxytetracycline, tetracycline and other antibiotics to reduce the incidence of yellow and white diarrhea in piglets.
(6) The sick pigs should be found to be isolated and treated in time.
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