When is the mating time for sows, and how can miscarriage be prevented?
A sow is a female pig that has given birth to piglets. There are many breeds, and mating is extremely important in the process of raising sows, because it is the foundation of commercial pig production.So when is the usual mating time for sows? What can be done to prevent miscarriage?
1. Basic introduction to sows
1. Sow breeds
At present, sow breeds in China include Taihu pig, Landrace, Large White, Erhualian, Jinhua pig, Duroc, Pietrain, Rongchang pig, and others, and the price of each breed is also different. Among them, the price of Taihu sows is 1500 yuan/head; the price of two-way cross pigs and Landrace in Shuyang, Jiangsu is 1000 yuan/head, with a minimum order of ten head; Meishan pigs in Jiangsu are 950 yuan/head, with a minimum order of 6 head.
2. How to select sows
(1) Choose to buy sows from farms with a large scale and a high technical level, and buy sows that reach the lean meat standard for lean-meat pigs, grow and develop quickly, and have good reproductive performance and good adaptability to local feeding conditions.
(2) Choose sows that give birth to many piglets, reach sexual maturity early, tolerate coarse feed, have strong adaptability, and show obvious estrus symptoms.
(3) In addition, from the appearance, the selected sow should have no obvious defects in the external genitalia, generally no fewer than 7 pairs of teats, and the teats should be evenly spaced and well developed; in addition, the body should be healthy, the growth rate fast, with no symptoms of disease, free movement, and early puberty.
2. When is the usual mating time for sows?
1. If you want sows to give birth to many good piglets, the mating time is also very important. Generally, ovulation in sows usually occurs 24-48 hours after the start of estrus, and the ovulation peak is about 36 hours after estrus. Sow ovulation lasts 10-15 hours or slightly longer. The time during which eggs retain fertilization capacity in the reproductive tract is 8-10 hours, while sperm generally retain fertilization capacity in the sow reproductive tract for 10-20 hours. Therefore, mating should be chosen to take place 2-3 hours before sow ovulation.
2. Generally, after the first mating of the sow is completed, a second mating is carried out 8-12 hours later. If the sow's vulva begins to reduce in swelling, the vulva begins to crack, and the color changes from flushed red to light red, then it is the suitable mating time.
3. What can be done to prevent miscarriage in sows?
After a sow is successfully mated and conceives, in addition to adequate nutritional supply, the most important thing is to prevent miscarriage. Several key points are introduced below:
1. Carry out scientific feeding, maintain the sow's breeding body condition, keep the sow at 80 percent fatness, feed it fully nutritional compound feed, ensure the nutritional needs of the fetus, and at the same time keep the sow pen dry and clean.
2. Appropriately feed the sow green, succulent feed and mild laxative feed such as wheat bran to prevent constipation in the sow.
3. Never feed moldy, deteriorated, toxic, or irritating feed to sows, do not feed acidic silage or distillers grains containing too much alcohol, and do not feed frozen feed.
4. When mating sows, prevent inbreeding and cull sows with genetic defects.
5. Prevent diseases such as diarrhea, colds, and high fever during the sow's gestation period. In addition, during the sow's gestation period, avoid collisions, squeezing, chasing, and whipping.
The above is all the content introduced by the Tuliu.com editor today. Farmers should pay close attention to these points.