Key points of feeding and management of breeding boars

   (1) Nutrition and rational feeding of Boars

   breeding boar diet should pay attention to good palatability, the volume should not be too large, so as not to cause belly. Per kilogram diet contains 12.9 megajoules of digestible energy, 17% protein, 7.9 grams of lysine, 2.6 grams of methionine, moderate ratio of calcium to phosphorus, 15 grams of calcium, 10 grams of phosphorus, and 10 grams of salt. Vitamin A 4 100 International Unit, Vitamin D230 International Unit, Vitamin E 11 mg.

The daily feeding amount of    reserve boars was 2.0-2.5kg, and that of adult boars was 2.5kg-3.0kg. Increase 15%-20% in winter and breeding season, you can add an appropriate amount of turquoise succulent feed, 0.5-1.0 kg per day, boars are fed twice, either dry or wet.

Management of    (II) breeding Boar

   1, group feeding and single feeding: breeding boars can be raised in small groups at first and in one circle after adulthood to prevent fighting.

   2, moderate exercise: proper exercise can promote appetite, help digestion and strengthen physique. Boars exercise not less than 1 hour a day, about 1 000 meters, can be carried out in the morning and evening.

   3. Keep the pig body hygienic: brush the pig body once or twice a day, often modify the pig's hoof and reduce the incidence of hoof disease. Boars can be washed frequently in summer to reduce the incidence of skin diseases.

   4, check semen quality regularly: boar semen vitality is more than 0.7, deformity is less than 18%, density is 70.8, apricot is checked once a week during breeding season, nutrition, mating times and environmental conditions of unqualified semen are adjusted in time, and some boars are eliminated in time.

   5, reserve boar training: the reserve boar begins to be trained at the age of 7 ~ 8 months, and the sows with obvious estrus and body size are selected for breeding. The training must be patient and do not beat the boar, each training time is 20-30 minutes, once a day.

The problem that    needs to pay attention to is that most boars are not genetic, disease or libido problems, but because boars are inexperienced and the trainers are rude, boars are afraid and lose confidence in mating. Therefore, boars should be allowed to build confidence in mating and accumulate experience after many times of study under relaxed conditions.

   6, heat preservation and cooling: the low temperature in winter reduces the resistance of pigs, affects the effect of breeding, and can appropriately increase the amount of feed and increase the temperature in the house. High temperature stress in summer has the greatest impact on pigs. When the temperature exceeds 33 ℃, it will seriously reduce the semen motility, increase the number of dead sperm and reduce the conception rate of mating, so the temperature can be reduced by means of wet curtain, fan, spray, shading, flushing and so on. Vitamin C, vitamin E, baking soda, raw gypsum and other buffering heat stress can be added to the feed to improve the breeding ability.