The method of preventing sow abortion
Fertilized eggs cause early death of embryos in the process of development and are absorbed by sows, commonly known as metamorphosis. It is one of the important reasons for the low birth rate, which can be solved by the following methods.
1. Strengthen feeding and management
The protein feed and energy feed were added 3 to 14 days before mating, and minerals and vitamins were added to make it quickly enter the best state of mating, and the feeding method of optimal feeding could be adopted for the empty sows with poor body condition. that is, to strengthen nutrition for a long period of time before mating, so that it can restore fat and physical strength as much as possible, so as to facilitate mating, conception, fetal preservation and improve the litter rate.
two。 Timely breeding
The mating time of sows is the best at 22 ~ 24 hours after the beginning of oestrus. From the symptoms of oestrus, sows change from extreme excitement to quieter, white filamentous mucus from vagina, hand pressure on sows' back and waist, sows stand still, the mating time is the best, so the mortality rate of embryos is low and the birth rate is high.
3. Regulate endocrine
Seven days after mating, each sow was injected with progesterone 30 mg intramuscularly, which could effectively reduce embryo death and prevent sows from turning fetus.
4. Improve feed quality
Sows during pregnancy, feed quality should be good, strictly prevent mildew, pollution, frozen feed to feed sows, otherwise prone to food or pesticide poisoning, light cases will cause embryo poisoning death, serious cases will affect the life safety of sows.
5. Control the ambient temperature
In the first week of pregnancy, embryo death increases in sows when the ambient temperature reaches 32-35 ℃ in a short period of time (24 hours); similarly, embryo death can also be caused by breeding with heated boars, so it is best to keep the ambient temperature between 15-25 ℃.
6. Proper exercise
Give priority to free exercise, but to prevent sows from falling.
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New Therapy for Porcine Necrotizing Dermatitis
Epidemic characteristics: pig necrotizing dermatitis caused by necrotic bacilli, its infectivity is very strong. In the hot and humid weather every year, piglets, shelf pigs, boars and sows are prone to the disease. The disease occurred in the whole litter, and there was interactive infection between piglets and sows, but more piglets were infected by sows. At the beginning of the disease, systemic symptoms are not obvious, severe cases of elevated body temperature, less food or loss of appetite, emaciation, often due to cachexia and death, which is harmful to the pig industry. Characteristics of the disease: first of all, red papules with large grains of rice appeared on the skin on the body surface.
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The recuperation of pigs' bad habits
Pig farmers often find that some pigs gnaw on wooden stakes, eat grooves, arch the soil randomly, and even arch the inside like a "shell pit." this kind of pig refuses to sleep peacefully, only eats and refuses to gain weight, and some pigs shit and pee in the nest, making the cleaning work very troublesome. These are the bad habits of pigs and can be solved through recuperation. Pigs disorderly supply of soil, gnawing on wooden stakes, eating grooves and not sleeping comfortably are caused by a single feed and lack of minerals. First, mix well with 50 kg of clean yellow mud, 25 kg of coal ash and 150 grams of ferrous sulfate.
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