The reproductive rate of sows is related to the economic benefits of large-scale pig farms. It is an important indicator of turning sow's potential biological productivity into practical productivity, and is an important indicator to measure the comprehensive production level of a large-scale pig farm. Maintain reasonable sow population structure Establishing and maintaining a reasonable structure of the sow group is a basic work for a large-scale pig farm and a fundamental measure to achieve high quality, high yield, and high efficiency. Reasonable sow population structure is 1 to 2 fetal sows accounted for 30% to 35% of the entire production sow, 3 to 7 fetal sows accounted for 60%, 7 or more sows accounted for 5% to 10%. In order to achieve a balanced production on the farm, there should be plans to select good gilts and gradually update the herds so that the quality of the herds will continue to increase. The selected gilts should meet the cultivar or hybrid combination specified in the seed selection plan. Individual choice should be strict, requiring strong limbs, good maternal reproductive performance, more than 10 litter size, normal development of the genitals, no genetic defects, no less than 7 pairs of effective nipples, neatly arranged, without inverted nipples, hernia nipples, small Nipples and so on. The gilts also need to be nurtured to make them well developed and have good breeding conditions. Take measures to increase litter size The pighouse temperature has a lot to do with sow breeding. The suitable temperature for general gilts is 17°C~20°C, and the suitable temperature for pregnant sows is 11°C~15°C. This is because high temperatures can cause the sow's body temperature to rise. High uterine temperature is not conducive to the development of fertilized eggs and embryos. With planting, the mortality of embryos is high and the number of litters is small. Cooling measures can be taken so that the temperature in the house does not exceed 21°C. Just-in-time breeding is crucial for obtaining higher litter size. Premature or late breeding will lose part of the egg, thereby reducing the number of litters. When the sow’s estrus signs are obvious, allowing the boar to cross or test manually or seeing the boar not move around, and then compounding it again 12 hours later, generally better breeding results and higher litter size will be achieved. Large-scale swine breeding generally adopts two-time repeated breeding, such as pre-feeding in the morning before breeding 1 and compounding in the afternoon before feeding, such as breeding in the afternoon, and compounding in the morning on the 2nd day. Grasp the age of the first match at the right time, the first estrus sows or the first time the breeding boar cross breeding, basically free of fetal. The gilt's initial maternal age should not be less than 8.5 months, and the weight should be 110 kg or more. Breeding on the 2nd or 3rd estrus is ideal. Early mating will affect the number of litters and the mating of the second child. Late mating will affect the conception rate and the useful life. To obtain a higher number of litters, it is important to grasp the appropriate mating age and prevent premature and late. Implementation of early weaning and shortening of the lactation period, general sows are suitable for weaning 21 days to 28 days after farrowing. Weaning at this time has less effect on the sow's sorrow and the number of litters in the next litter, and has less adverse effects on piglets. The weaning time of young sows should be postponed to about 35 days, which is conducive to maintaining or increasing the number of litters of the second child. Do a good job of miscarriage to prevent a miscarriage. After a sow group or a litter sow is lapped, observe carefully and carefully manage it, such as finding signs of miscarriage or injecting progesterone into sows with a miscarriage history. The injection promotes row 2 and the sow ovulates for about 20 within one estrus period and the ovulation duration lasts from 10 hours to 15 hours. Using LRH-A2 to treat sows can promote egg maturation and intensive ovulation, thereby increasing the conception rate and increasing litter size. number. Increase the nutritional composition of sows Vitamins and other trace elements, although small in demand, are necessary nutrients for maintaining healthy and normal development of sows and play an important role in the breeding process of sows. Such as vitamin A deficiency, can lead to sexual cycle of sows, miscarriage or stillbirth, weak, deformed or ecchymosis, reduce the number of live piglets; lack of vitamin D will reduce the conception rate, litter size and survival rate before weaning; The lack of vitamin E will reduce the function of the ovary, reduce follicular luteal cells, thereby reducing the number of litters, the mortality rate of piglets before weaning is high; iron deficiency will make the survival rate of piglets less, copper deficiency will make sows produce more dead fetuses, manganese deficiency Sows will inhibit the development of sexual organs, abnormal bone development and so on. Reasonably eliminate the sows with low performance There are plans to adjust the structure and age structure of the production sows, and timely supplement high quality spare pigs to maintain a reasonably healthy sow population structure. The principle of elimination is generally: sows with chronic abortion due to habitual abortion or uterine bleeding, sows that are not subjected to estrus disapproval for two consecutive breedings, or sows with reduced performance for more than seven babies, and two months after weaning. Non-estrus sows, sows with poor suckling performance, such as sows with no milk or biting after giving birth, no feeding, etc., sows with two consecutive litters with fewer than five litters, postpartum warts, or affected hindlimbs affecting mating sow. Controlling disease transmitted to herds Large-scale pig farms should adopt self-cultivation and self-cultivation to prevent the introduction of reproductive diseases. The introduction of breeding pigs from foreign pig farms must be strictly observed for more than one month to ensure the health of the purchasing pigs. For gilts, parvovirus, pseudorabies, and JE vaccine injections should be performed before mating to prevent the development of reproductive disorders. The sows suffering from vaginitis and metritis should be promptly treated. They can be washed repeatedly with normal saline or 1 ‰ potassium permanganate solution and injected with penicillin and streptomycin. Raised toilet seat makes toilet higher off the ground to reduce bending and allow individuals to confidently use the restroom independently Raised Toilet Seat ,Raised Toilet Seat With Arms,Elevated Toilet Seat,Raised Toilet Seat With Handles Foshan Oscar Medical Instrument CO.,LTD , https://www.fsoscarmed.com
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