High temperature in summer can cause boar's heat stress, severely affect its production performance, make the boar's sexual desire significantly reduced, semen quality decreased, sperm extraction significantly reduced, sperm survival time was significantly shortened, and even induce boar testicles inflammation. Here are some technical measures for keeping boars safe in the summer:
1 Environmental Control
1.1 heatstroke design of piggery. The roof of the pig house should be provided with two layers inside and outside, and vents should be provided. The inner layer of the roof should be made of light material as insulation material, and the outside can be covered with asbestos. Windows on both sides of the wall should be opened to facilitate lighting and ventilation. Before the advent of summer, the facade of the pig house was repainted with lime milk or white paint, which reflected the strong sunlight. Open shacks must be shaded to prevent direct sunlight. The scaffolding can be built above the boar enclosure, and some climbing plants can be planted around the pens, or branches can be placed on the scaffolds to prevent direct sunlight and reduce the ambient temperature of the pig house. Pighouse screens should be installed to prevent mosquito bites.
1.2 cooling measures:
Cooling measures:
1.2.1 Install air conditioners. Breeding farms and pig manure insemination stations with good conditions can be equipped with air conditioning to ensure excellent sperm production capacity.
1.2.2 Wet curtain cooling is a better method and is suitable for large-scale pig houses. Hanging sackcloth or straw curtains on the windows of pig houses to keep the sacks or straw curtains moist can also have a good effect.
1.2.3 Water cooling is an economical way. Dripping spray, flushing the ground, spraying on the roof, etc. can be used.
2 dietary adjustment
2.1 Protein Addition: Increase the proportion of crude protein in the diet to 18% to 21%. The added protein feed may use soybean cake, fishmeal, vegetable oil, etc. When using the oil to add protein feed, the proportion of the added vegetable oil to the diet of the boar is 3%-5%. Be careful not to use cottonseed cake as a protein feed for male boars.
2.2 Supplement of green feed: The green, green and non-toxic pesticide-contaminated feed is selected and fed 2 to 2.5 kg per day.
2.3 Addition of dietary zinc: From May to September, zinc lysine, which has a heat stress-relieving effect, is added to the diet, which is ideal for relieving heat stress in boars. The amount of zinc added is 50. Kg 100 grams of feed.
2.4 Supplement of Vitamin C and Vitamin E: In the feed of boars in summer, the amount of vitamin C and vitamin E should be increased. For every 100 kg of feed, add 40 grams of vitamin C and 20 grams of vitamin E.
3 feeding methods
Should be sophisticated, regular quantitative, ensure drinking water. Mainly concentrate, supplemented with green and juicy feed to improve the rationality and palatability of nutrition. In the case of wet mix, feed 3 times a day, breakfast should be early (around 6am), dinner is late (around 19 o'clock in the evening). Each feed should be quantified, usually 90% full. Every day should always ensure adequate clean water below 18 °C for pigs to drink, it is best to install automatic drinker. Always check the quality of the feed, it is strictly forbidden to have mold and spoilage.
4 Strengthen management
4.1 Reasonable exercise: Normally arranged before feeding in the morning and after feeding in the evening, the back-up boar is controlled within 1-2 hours of exercise time, and the adult boar is 0.5-1 hours per day. The weather on a cool and cloudy day can be extended for half an hour.
4.2 Reasonable illumination: In the summer, due to the long illumination time, the method of concealing the interior windows can be used to keep the summer illumination time 8-10 hours per day.
5 Reasonable use
5.1 Frequency of use: 2-4 year old male boars can be assigned 2-3 times a week. After 5-6 days of continuous breeding, they should rest for 1-2 days. For artificial boared boars, young boars aged 1-2 years are harvested twice a week, middle-aged boars are harvested once a day, and aged boars older than 4 years are harvested once a week.
5.2 Location and time: Natural mating or artificial sperm collection should be performed at a special location in the morning and evening when it is cool (usually before 6 am). The temperature of the semen storage and transportation box should be guaranteed at 18-20°C to avoid sperm infusion at noon.
5.3 Strict boar semen examination: The viability and density of the spermatozoa are checked microscopically once every 3-4 days as a basis for adjusting the feed formula, exercise time and number of breedings.
6 Epidemic prevention and control:
6.1 Sanitary cleaning. Remove the leftovers in time to prevent the feed from becoming moldy; clean the feed trough and drinking fountains regularly; remove the excrement in time and keep the room dry and ventilated.
6.2 Regular disinfection: regular use of different disinfection drugs, alternate spray disinfection; tools and work clothes should also be cleaned and disinfected on time to avoid cross-infection.
6.3 Elimination of mosquitoes and flies: Regular spraying of insecticides on pig house walls, sports fields and sperm collection rooms to eliminate mosquitoes and flies.
6.4 Plan immunization: The pig farm should strictly carry out immunizations for swine fever, No. 5 disease, pseudorabies, parvovirus, Japanese encephalitis, brucellosis, and highly pathogenic blue-ear disease. jobs.
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