The main production task of sows is to reproduce piglets and provide pigs. The goal of reproduction is to increase the number of ovulation, increase the fertilization rate, increase the implantation rate of embryos, reduce the mortality rate of embryos, and produce a large number of uniform, healthy and lively piglets at the time of delivery, so as to achieve the purpose of increasing the economic efficiency of the farm. To increase the number of litters of sows depends not only on the quality and performance of the sows, but also on good husbandry and management, so as to ensure the normal estrus, breeding, implantation of embryos, growth and development, and successful birth of sows. To reduce stillbirth and miscarriage, increase the number of surviving births.
1. Cultivation of good gilts 1. Sow gilts are required to have excellent genetic performance, in line with species or strain characteristics (such as Landrace, Dabai, Duroc), with moderate body condition, good physical development, long physical stature, and effective nipples. More than 6 pairs and neatly arranged, uniform, gentle personality, good motherhood, strong resistance, fast food intake, not picky eaters. It has the genetic properties of fast growth, high feed reward, thin backfat, high lean meat percentage and lots of litters. 2, to maintain a good reserve sows, to achieve 60 kg of body weight, free access to feed, 60 kg after the restriction of feeding, feed a feed of about 2 kg per day, and add green feed, can not make the body fat, affect Sow reproductive performance. Under good husbandry and management conditions, gilts can be in estrus for the first time at 6 months of age. At this time, the gilt needs more nutrition. It is recommended that gilts need to be effectively replenished from the gilts for 6 months of age. The required trace elements and functional minerals promote the development of the ovaries and uterus of sow gilts and achieve maturation and sexual maturity.
Second, a reasonable arrangement of breeding season in October breeding, in January-February 1-2 months of litter; 2-3 months again breeding, litter from June to July. With this arrangement, the sow can produce 2.5 litters a year and 5 litters a year (to reach the international advanced pig raising level). Native sows should be bred 2-3 days after estrus, and sows should be introduced on the afternoon of the day after estrus or on the morning of the second day. Hybrid sows should be bred on the afternoon of the second day after estrus. When mating, follow the principle of "early match with old, small with late, not old with small". Years of practice have shown that mating is carried out before feeding in the morning and in the evening to ensure that the fertility rate reaches 85%.
Third, master the mating skills sows best practice 2-3 times breeding system, and resolutely put an end to the use of close relatives boar breeding. Disinfection of male and female sows outside the genitals with 0.1% potassium permanganate before mating requires that the density of boar spermatozoa be 200-400 million per milliliter, and that 70% of them should move linearly. After the first breeding, the second breeding is performed at intervals of 10-12 hours, and the qualified farmer performs the third breeding at intervals of 10 hours. When artificial insemination is performed, it is necessary to ensure that the amount of semen diluted by each input is 80-100 ml, and the sperm density is more than 4 billion. The vas deferens is rotated clockwise and the insemination process is generally maintained for 5-10 minutes. After the insemination is complete, allow the vas deferens to stay in the body for 30-60 seconds and then gently rotate counterclockwise to exit. The mating staff pressed the sow's waist to prevent the sow from bowing and causing semen to flow out.
Fourth, lactation breeding and health feeding sows during the first estrus during lactation 2-5 days postpartum, 24 days postpartum breeding effect is better, if the piglets are still not matched before weaning, need to be after weaning 3 - Wait 5 days for estrus in the sow. The lactating sows need to effectively improve the sow's milk quality, promote the sow's uterus to be old, and enable normal estrus breeding after weaning.
5. Strengthen management during pregnancy to ensure that the fertilization rate is bred in a single lap after breeding and prevent abortions from fighting. The early gestation (0-30 days) of the sow is the peak period of embryonic death. It must be guaranteed to feed high-quality full-priced feed and reduce the energy standard. The dietary feed amount is 1.5-2 kg per head and crude protein is 14%-15% to ensure the supply of minerals and vitamins. In the second trimester of pregnancy (31-70 days), the growth of the fetus is accelerated, and the amount of sows fed is guaranteed to be 2-2.5 kg per head and 13%-14% of crude protein per day. The green feed is increased and activities are enhanced. Late pregnancy should be improved nutritional standards, crude protein 16% -17%, it is recommended in the late pregnancy sows need to effectively improve the piglet birth weight and disease resistance, improve the survival rate of childbirth, pay attention to reducing the material five days before birth, to prevent postpartum food, Do not feed on the day of farrowing, but must ensure sufficient drinking water.
Sixth, do a good job of sow delivery, improve the survival rate of piglets piglets sow delivery time is generally completed within 2-3 hours of production, each piglet delivery time interval is 30 minutes, so pay attention to the birth interval at the time of delivery If the delivery time is too long, midwifery should be taken in time (manual scouring pigs) to prevent suffocation of piglets. After the piglets are born, they should promptly wipe the surface mucus of the piglets, apply green leaves to protect the safety, quickly dry the body surface to prevent body heat loss, put the colostrum into the incubator for 2 hours, and prevent the frail piglets from hunger and freezing. , increase mortality.
Medical Equipment Disposal,Syringes Needles Sizes,Disposable Syringe,Insulin Syringe
FOSHAN PHARMA CO., LTD. , https://www.forepharm.com