With the change of market demand, pig breeders and breeding boar specialists continue to introduce good breed pigs from breeding farms. Now we will introduce the following suggestions for the introduction of breeding boars: 1. Grasp the age of some breeding breeders. Pigs who engage in specialized breeders are eager to seek benefits and use them too early, which shortens their useful life and are not worth the candle. The Duroc reserved boars are only available until the age of 8-9 months and the weight of 120 kg or more. Large white reserve boars older than 10 months and weighing 120-150 kg can participate in breeding. Do not use too early. The first breeding should be a small, docile and estrus-prone gilt, and let the boar mate in his own house to avoid slap and fright. Second, reasonable exercise is to strengthen the body's metabolism, exercise the nervous system and muscle important measures. Reasonable exercise can promote appetite, help digestion, enhance physical fitness, and improve reproductive performance. It is generally required to exercise once in the afternoon and one in the afternoon, each time for about one hour, and the mileage is about 2 kilometers. In summer, exercise should be carried out in the morning and in the evening. In winter, it should be carried out at noon. In case of extreme heat and cold, bad weather such as wind and rain should stop. The breeding period should be moderately exercised, and the non-breeding season and the mating preparation period should be strengthened. Third, to master the use of excessive strength breed boar breeding use, will significantly reduce semen quality, affect the conception rate; such as long-term boar without breeding, resulting in sexual desire is not prosperous, poor semen quality, often caused by the sow is not fetal. Generally young boars are bred 3 times - 4 times a week, and adult boars are bred 5 times - 6 times a week. Fourth, to master the feeding technology should be based on breeding standards for boars, provide a reasonable diet, rather than simply use the sow diet or finishing pig diet replacement, so as not to cause a belly or excessive fat, affecting the use of breeding. The boar breeding period should be fed about 2.7kg per day, with a metabolic energy of 12.5 MJ/kg, and a high-quality pig material with a crude protein content of 15.6%. When the breeding task is heavy, 2 eggs or 1 kg of fresh can be fed. The practice of milk supplements nutrition. V. Preventing Diseases by Preventing Diseases Some pig farmers have neglected the immunization of boars and caused the occurrence of diseases such as JE and parvoviruses, which have seriously affected the utilization value of boars and caused great economic losses.
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