Attention pig breeder!
2021-04-10
Qingdao Zhongren Animal Medicine Co., Ltd
Zhongren kinetic drug
Three Elements of Improving Sow Reproduction
The reproductive ability of sows is affected by many factors, such as heredity, nutrition, environment, health status and so on.
1. improve the utilization intensity of sows and increase the number of births per year.
The adjustable factors to increase the number of sows per year are only early weaning and early estrus after weaning. Now weaning is usually used in 28-35 days, which can make sows produce 2.2-2.3 litters per year. Foreign countries adopt 14~21 days weaning, with an annual output of 2.5~2.7 litters. Ensuring that sows are in estrus within a week after weaning is another factor in increasing the number of nests per year.
1, control of body weight, sows before delivery and after weaning weight gap control within 10~15kg, after weaning will be estrus as soon as possible;
2, shorten the lactation period, the implementation of early weaning, improve a period of pregnancy rate, shorten the estrus interval;
3. After weaning, the sow can be rushed to the boar to stimulate estrus. When necessary, gonadotropin can be used to promote estrus. Extending the light time is also an effective measure to accelerate estrus and increase ovulation.
2. effective measures to improve the rate of sow production and increase ovulation
1. Control the initial matching age. Under normal feeding conditions, the initial age and weight of sows are: 8-10 months old and weight 80-90kg of imported varieties; 6-8 months old and weight 60-70kg of local varieties.
2. To improve the fertilization rate of pigs, the premise is that the semen quality of boars is good. After selecting excellent boars for microscopic examination, sperm motility above 0.7 can be artificially inseminated for estrus sows, which can improve the conception rate and increase the number of litters.
3. Reduce embryo death, reasonably supply full-price nutrition for the three death peaks (the first stage of mirror implantation on the 9th to 13th day of fertilization, the third week of pregnancy and the 60th to 70th day of pregnancy), do not feed moldy, spoiled, frozen and toxic feed, reduce environmental stress and embryo death, and strive for more live births.
3. control the nutrition level during pregnancy and strengthen the management during pregnancy
1, the pregnant sows should be established before and after the high nutritional level, that is, to reduce the feed supply during pregnancy, so that the pregnancy weight gain control in 30~40kg.
2, pregnant sows should be appropriate activities to enhance physical fitness, prevent crowding, reduce stress stimulation, prevent stillbirth and abortion, do a good job of heatstroke and cold prevention, reduce embryo death.
In the process of sow feeding and management, taking some simple nutrition methods will often significantly improve the reproductive performance of sows.
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