How to increase gilt productivity

Special nutrition. In order to ensure the normal growth and development of gilts and good reproductive performance, gilts must use special pig material. Because gilts require a lot of nutrients such as calcium, phosphorus, biotin, linoleic acid and vitamin E, vitamin C, carotene, choline, and special energy, they are different from fattening pigs and also different from pregnant or nursing mothers. pig. It is unscientific for some gilts to feed pregnant sows or lactating sows to gilts, which can easily lead to problems such as weak limbs and hooves, hooves, estrus, and low number of births. The "breeding bar" developed by Beijing Jinneng Group Biotechnology Co., Ltd. is a high-quality premix specifically designed for gilts, sows to be bred, and boars. The design idea is: to strengthen the addition of calcium and phosphorus to improve The pig's limbs are robust, reduce hoof cracks, increase the service life of breeding pigs, and strengthen the addition of vitamin A, vitamin E and biotin to increase the growth of the reproductive organs of breeding pigs and improve reproductive performance (number of live animals, etc.); The addition of organic trace elements to stimulate the development of the pig's immune system and hormones, enhance boar libido, improve semen quality of boars, increase sperm motility and quantity, regulate the development of hormones in breeding pigs, promote timely estrus in sows, and improve Sows pregnancy rate and ovulation number.
Special feeding. The special feeding of gilts generally starts from 70 kg and ends when they participate in breeding. To reach the following objectives before the allocation: First, P2 point back to the thickness of 16mm ~ 20mm. Between 70 kilograms and the initial match, it is mainly to promote the deposition of fat rather than lean meat, which requires a unique balance of energy and protein, in order to ensure that the back patella thickness of the P2 point before participation is 16mm~20mm (body condition score 3~ 3.5). It is critical that gilts reach adequate body reserves. Dr. Sw Close, a UK swine expert, said that the condition (fat leanness) at the time of initial mating of new sows will affect their reproductive capacity throughout their lives. The better the body condition (not skinny or fat), the higher the production performance of the sow during her lifetime; the poorer body condition (too fat and too thin), the lower the production performance of the sow during her lifetime. Second, the weight reaches 130 kg to 140 kg. The weight at the time of initial mating has an important influence on the reproductive performance of later sows. Studies have shown that the higher the initial weight (150 kg), the higher the mortality rate of the pigs and the lower weaning weight, and the lighter weight pigs (120 kg). ) Less feed intake during lactation. From the long-term reproductive performance point of view, the initial weight of 135 kg is appropriate. Third, ovulation on time and ovulation. On-time estrus is to allow gilts to heat in accordance with artificially set time, otherwise, estrus does not occur at the time, weight will increase, some gilts can only be eliminated. It is generally believed that when the first estrus occurs after sexual maturation, the fertility rate of the mating is lower, and when the second or third estrus occurs after sexual maturation, mating is more appropriate because the number of ovulation increases as the number of estrus increases after sexual maturation. Increase accordingly. To achieve these goals, we must implement special breeding methods.
Limit feeding. After the gilt reaches 70 kg in body weight, the gilts are restricted to feed. The main purpose of the gilts is to maintain the appropriate body condition of the gilts and prevent them from becoming overweight. Therefore, feeding 2 kg to 2.4 kg of feed per day can meet the needs of gilts.
illumination. The time and intensity of light can affect sow reproductive performance, growth and disease resistance. Studies have shown that daily provision of 16 hours for gilts with intensity of 150 lx to 300 lx can shorten the initial period by 18.5 days, and shorten the intercourse period (the interval between two estruss before maturity) by one and a half days. At the same time, it will also increase the subsequent fertility rate and births. In general, for every 3 to 4 sows, a 60W artificial light source can be provided at 1.5 meters above the lying area.
Boar stimulation. When a gilt reaches 150 days of age, adult boars can be contacted face-to-face for 10 minutes to 15 minutes twice a day. It is best to replace one adult boar of different breeds or colors with each day.
The sex ratio of the pig. Some scholars have evaluated the reproductive performance of gilts from different gender groups. The results show that gilts from a large number of boars have a lower success rate of mating and have a higher number of maternity For 12 pigs, if the proportion of boars exceeds 67%, the sows in these herds should not be kept as gilts but only as commercial pigs.
Breeding times. The results showed that breeding times had a certain influence on the reproductive performance of sows. The number of litter production increased by 1.1 (8.6 vs. 9.7) and the number of live births increased by 1.2 (8.1 vs. 9.3) when compared with the second breeding. Compared with two breedings, three breedings did not show significant improvement in litter production. In addition, the number of breeding has no effect on the conception rate, and it is appropriate to use two breedings in actual production.
Aphrodisiac feeding. An aphrodisiac supplementation of 10 days to 15 days before mating can increase the number of ovulations promoted by constitution, and this effect is more pronounced for sows with lower feed intake.
movement. A solid mud surface is good for the reserve pigs, and the surface should not be too smooth or too rough. For 100 kg of reserve pigs, a 1.5 square meter circle can be used for each head, but the circle should be increased to 2 square meters per head in the initial allocation so that the reserve pigs have enough area to strengthen the leg exercises.
Special management. The first is isolation, keeping them separated from the original herd to reduce the risk of harmful pathogens entering the group. If you do not have a separate cage, choose a backyard pig that is out of the way and is downwind. Followed by domestication of terroir. Terrestrial domestication is an important part of the isolation period, the main purpose of which is to allow the new gilts to adapt to the pathogens of the receiving colony before mixing, and this strategy can also be applied to self-produced gilts. Contact should be carried out face to face with cull sows or nursery pigs, the time can last about 30 days.

Strong immunity. To build a strong immunity of the reserve pigs is a very important basic work. It is necessary to protect the pigs themselves from infection, but also to pass maternal antibodies to the pigs through milk to protect the healthy growth of the pigs. Some pig farms do not attach importance to vaccine immunity for gilts, resulting in a high proportion of stillbirths and mummies during the first childbirth, and a large loss; some pig farms also have epidemic prevention, but the disease can still be transmitted without error. This is why What? Some of the following issues need to be taken seriously.
The vaccine is correct when it is injected. The timing of the vaccine injection is very important. The injections are early, the antigens and antibodies neutralize each other, and the original higher antibody level is lower after the vaccine injection. When the injection is late, most of the porcine antibodies are very low, which easily leads to disease. It is best to use the antibody monitoring on large-scale pig farms to find the most suitable time for immunization in this field. This is scientific. For example, the parvovirus vaccine can produce immunity one month after the injection, so it needs to be injected in advance; the JE vaccine is effective when the reserve pig reaches the age of 5 months or more; the vaccination of the piglet needs to be down to a certain level. can. In short, one of the conditions for successful immunization is that the timing of immunization is correct.
Injections must ensure quality. When the adult pigs are inoculated, pigs should be used to hold the pigs. The pigs with relatively small weight can use a partition to squeeze the pigs into the corner of the pens, and then sighted and inoculated vertically.
Needle length must be guaranteed. Although the short and thick needles are not easily broken, the thick needles can easily cause vaccine spillage. The short needles cannot inject the seedlings into the muscles, resulting in insufficient antibodies. Therefore, more than 50 kilograms of spare pigs should use 1238 needles to ensure immunity.
Recommended routine immunization procedure. The first week before mating; Pseudorabies; The second week before mating; Swine fever; The third week before mating, No. 5 disease; The fourth week before mating, PRRS; The fifth week before mating, Pseudorabies; Week, parvovirus; Parvo 9 weeks before breeding, parvovirus. In March and April of each year, Japanese swine vaccination supplemented with 5-month-old pigs is given twice at intervals of 2 weeks to 3 weeks.

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