Breeding boar four note

To choose a good boar

The selection of boars generally requires a very big eye, thin skin, thin luster, strong physique, long back and wide; forequarters open, full hind legs, strong limbs strong, hoof quality solid. Currently used varieties are Changbai, Yorkshire and Duroc.

To keep a good boar

Boar fat, weakened sexual desire or even lack of sexual desire, resulting in decreased ability to breed, this situation is mostly due to a single feed, energy feed too much, and protein, minerals and vitamins caused by insufficient feed. Energy feeds should be reduced in time, protein feeds and green and juicy feeds should be added and sports should be strengthened.

The boar is too thin, the amount of ejaculate is reduced, and the quality of the semen is poor, resulting in a low conception rate of sows. This situation is mostly caused by malnutrition or excessive breeding. Feeds should be adjusted to enhance nutrition and reduce the number of matings so that they can resume their body condition.

The boar diet should be mainly concentrated, limited feed, appropriate amount of green feed, less feed high-energy feed, to prevent breeding pigs fat. However, it is also not possible to feed too much roughage so as not to stretch the belly and prevent mating. There should be more than three kinds of dietary composition, and the protein content should not be less than 16%. Animal feeds such as silkworm cocoons and fishmeal should be properly fed. Beans, cakes and large wheat are good feeds for feeding boars. High-energy feeds such as corn and rice bran should not be fed in large quantities.

To use a good boar

Breeding can be divided into natural mating and artificial insemination. Artificial insemination is an advanced breeding technology widely promoted at present, which allows far-ranging male and female pigs to be bred in time to prevent the spread of reproductive tract diseases and to extend the useful life of male boars. When breeding, you should pay attention to the following questions:

1. Appropriate age and weight for starting breeding are generally required for boars aged 10 to 12 months and weighing 80 to 100 kg. Agricultural breeding boars use this method of communication, and should not be used prematurely, and should not be overused.

2. Old male and female pigs should not be mated with each other. Because their vitality is weakened, their physiological functions are declining. If they are allocated to each other, they will not only have fewer litters, but also will have difficulty in obtaining superior offspring.

3. Matching time is best 2 hours before and after feeding in the morning. After walking for a long time or after strenuous exercise, it should be given after half an hour of rest. After mating, it should be rested for half an hour before being expelled; bathing or showering should be prevented before and after mating.

We must do a good job in preventing and controlling diseases

First of all, we must do a good job of two vaccination spring and autumn, and pay attention to check the quality of the vaccine, pay attention to the replacement of injection needles. Keep the pens clean and regularly disinfected. Avoid feeding dead animals and their drowning. Always observe the health condition of the breeding pigs, find the disease, and consult a veterinarian for treatment.

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