Raising piglets' weaned nests and focusing on "three forces"

During the growth and development of pigs, the piglet stage is the stage in which the pig has the fastest growth and the highest feed utilization rate, and it is also the period with the highest mortality rate. To improve the weaning weight of piglets, comprehensive measures must be taken.

Increase birth weight and increase resistance

The birth weight of piglets is closely related to the survival rate.

Under normal nursing conditions, the mortality rate of piglets whose birth weight is less than 1.0 kg reaches 40% during breast-feeding, and the death rate of body weight from 1.3 kg to 1.5 kg is only 5% to 8%. Therefore, strengthening the rearing and management of sows so that they can produce healthy piglets is an important part of raising the weaning weight of piglets.

Introduce excellent breeding system, scientific breeding

Breeding sows of good breeds and large physique as commercial pig farms can increase the birth weight of piglets, perform reasonable hetero mating during the matching process, make full use of the advantages of hybridization, and prevent the mating of the smaller sized sows and sows. More weak and weak, so that its resistance, low immunity, increase mortality.

Strengthen feeding management and increase birth weight

(1) Pre-pregnancy (generally assigned to 80 days after pregnancy): The goal of this stage is to ensure that the sow has a complete nutrition, prevents the miscarriage of the sow, and promotes the development of the fetus. Proper feeding stimulation 7 days to 10 days prior to breeding can increase sows' ovulation number and increase litter size, especially for lean sows. The effect of “aphrodisiac supplementation” is better. In the early stages of pregnancy, under the influence of hormones and other effects of the body, the metabolism of the mother is strengthened, the appetite is increased, the digestive ability is increased, and the body weight is increased quickly. It is necessary to properly limit the feeding, otherwise the maternal body will become too fat, resulting in early abortions, and the number of litters will decrease. At the same time, it will also result in difficult labor during late delivery and reduced feed intake of postpartum sows, leading to a reduction in milk production and thereby affecting piglet development.

(2) Late pregnancy (80 days to 114 days of pregnancy): The goal of this period is to ensure that the sows are sufficiently nutritious, so that the piglets produced are neat and consistent, and avoid producing weak ones. Piglets' initial body weight of 60%-70% comes from the rapid growth of the later period (30 days to 40 days before labor). Therefore, the intake of nutrients in the late pregnancy of sows will directly affect the size of the fetus.

As the sow's abdominal circumference gradually increases, the digestive system is squeezed and each feed intake will decrease, and the number of feedings needs to be increased to meet the nutritional requirements. At the same time, this period is also the stage with the largest amount of minerals such as calcium and phosphorus. If it is not supplemented from the feed, it will easily cause decalcification of the sow, cause hindlimb limp and postpartum spasm, and affect the postpartum belt. Therefore, it is necessary to ensure adequate nutrition and give special care to sows whose body condition is poor. At the same time, it is necessary to ensure the freshness of the feed and the cleanliness of the feed trough and the drinking fountain so as to prevent bacteria from being produced due to feed spoilage and affect the pregnant sows and the piglets in the fetus. In the sows' diet, the energy level should be appropriately increased. In the month before delivery, daily supplement of 200-250 g of animal fat or oily diet (5% to 8% of the diet) can improve the colostrum. The milk fat percentage of regular milk increases the energy storage of the fetus and is beneficial to the survival of piglets.

Keeping postpartum pigs to ensure milking

The rearing and management of postpartum sows is very important. It is the guarantee for raising piglets. By artificially controlling feed intake, it can provide corresponding milk production to meet the needs of piglets.

The dietary requirements during sow lactation include the sow's maintenance and lactation requirements, so the amount of lactation sows fed depends on the sow’s weight, body condition, number of nursery pigs, and acceptable during lactation. Weight size. Due to different body weights, the maintenance requirement for sows is about 1.5 kg to 2.0 kg of standard diet (1.5 kg for local pigs and 2.0 kg for outsiders). One way to calculate lactation requirements is to feed 1 for each sow. The piglets need 0.4 kg of standard diet (about 0.3 kg for local pigs), so that a lactating sow that feeds 10 piglets needs to consume 6.0 kg to 7.0 kg of standard diet per day. If this feed intake is not achieved in actual production, it will cause the sow to lose too much weight during lactation, thereby affecting the reproductive performance of the next child, increasing the elimination rate of the sow after weaning, and also affecting the piglet’s Growth rate.

In order to increase the growth rate and weaning weight of piglets without making the weight loss of the sow too high, high energy fat can be added to the lactation feed to increase the energy level of the feed to compensate for the lack of standard feed intake.

In actual production, the feed intake of the newly-divided sow is less, gradually increasing after two or three days, and the maximum feed intake is generally reached after 2 to 3 weeks after delivery. The sooner the sow reaches the highest feed intake, the higher the feed intake during lactation, the greater the amount of lactation, and the faster the growth of the piglets. Therefore, during the feeding process, attention should be paid to artificially stimulating drinking and eating. They can be fed 2 to 3 times a day until the sow's body condition is restored after 7 days of lactation.

Piglet management, increase growth

The scientific production will use a hot towel to wash the sow's udder, genitals and buttocks before confinement, and then wash it with disinfectant solution. At the same time, it shall be sanitized in time to ensure that there is no dirt in the shop. Allowing piglets to grow in a clean, hygienic, dry and warm environment is a prerequisite for preventing diarrheal diseases in piglets.

Pre-immunization with colostrum and fixed teats is best for the piglets to eat colostrum within one hour after birth. At the same time, the stimulation of piglets' sucking milk is conducive to sow uterus contraction and speed up the delivery process. However, the first few drops of milk should be discarded. This part of the milk is relatively long for storage and susceptible to bacterial contamination. Piglets are most likely to cause diarrhea after eating. The first three days of piglets were kept in incubators at intervals of one and a half to two hours for feeding. Artificially fixing the teats for individual piglets usually adopts the method of “scratching two ends and caring for the middle”, that is, placing the weaker piglets on the front nipples and the strong ones with the nipple fixed on the back, and the other piglets fix themselves. Manually fixing the teat is an effective way to make the piglets grow neatly and prevent them from being produced.

Keeping warm, reducing stress The optimum temperature range for newborn pigs is 29°C~34°C. As the age of piglets increases, the temperature requirement will decrease. 1 to 3 days of age is 30 to 34 degrees Celsius, 4 to 7 days of age is 28 to 30 degrees Celsius, and then falls 2 degrees per week until about 20 degrees Celsius.

Early weaning The implementation of early weaning can increase the reproductive rate of sows and the number of litters produced per year, reduce the production costs of piglets, increase the utilization rate of delivery rooms, and effectively control the disease. Early weaning generally refers to weaning on the 21st or 28th day.

Have a good weaning pass, feed early, and scientifically feed the carefully managed piglets in the first week after weaning to keep them in a dry, warm, clean environment and minimize stress. Piglets should start feeding at the age of 7 days and feed less, and the piglets can feed on the feed after 2 weeks.

Strengthening health and epidemic prevention

(1) Immunity of prenatal gilts: Newborn piglets have poor disease resistance and are prone to death. Therefore, effective immunization measures should be implemented according to the local epidemic situation and the specific conditions of the field to protect the piglets. In general, the sows can be selectively vaccinated with E. coli vaccine, mycoplasma, transmissible gastroenteritis, pasteurella, swine erysipelas, streptococcus suis, and rotavirus in the first 5 weeks before birth and 2 weeks before birth. Deworming 7 days to 10 days before delivery. Dirty and severe pig farms can collect diarrhea from the piglets’ stomachs or piglets in the farrowing pigs 2 weeks before delivery, and feed them to pregnant sows (1 week before childbirth). This will enable sows to produce antibodies that are susceptible to the disease and produce a stronger protective effect on piglets.

(2) Piglet immunization (recommended immunization procedure): Inject Clostridium toxoids on the first day; Iron supplementation (best in selenium) on days 1 to 3; Transmissible gastroenteritis vaccine on days 3 to 7; 14 Day ~20 days of iron supplementation; 3 weeks to 4 weeks vaccination with Breeding-Respiratory Syndrome, Mycoplasma, and Salmonella choleraesuis Vaccine.

(3) Diarrhea in piglets: Diarrhoea is the disease most harmful to piglets. It may occur in pigs of all ages, but it occurs mainly in the following three age groups: 1st to 3rd day old piglets, 7 days old ~14 Day-old piglets and newly weaned piglets. The most common infectious agents of piglet diarrhea are E. coli (bacterial), rotavirus, transmissible gastroenteritis (viral) and some parasites such as coccidia. Non-infectious factors include digestive insufficiency, dietary antigen allergy, lack of nutritional factors, and stress factors. To take targeted measures to strengthen prevention.

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