Management of mating of sows and gilts

1. The development of sows intensification management systems is slower in the production of reared sows and bred sows than in finishing pigs. Many producers believe that exercise and grazing are necessary for normal reproductive performance. This concept reflects the lack of knowledge of the sow's environmental and nutritional needs. There are a lot of herds that are kept at full-time. Production figures confirm that grouping or individual limits do not lead to a reduction in reproductive performance. In most cases, limited sow rearing and management, low feeding costs, low elimination rate (because of less fighting) and pre-mortal mortality may decline.
When dry sows are placed in or tied in pigsty, the temperature should be maintained at 18-20 degrees. Sows that are housed in groups can withstand lower temperatures and can experience lower temperatures when providing mat grass. When sows are used, it is advisable to use partially slatted floors to ensure that the ground is dry for the sow to reduce the cleaning time. The back of the bar is 1.05 meters long. The slats are usually cement, with a width of 70-100 mm and a width of 19-25 mm. The edges of the slats should be blunt to avoid hoof damage.
The limited birth system has significantly lower lactation mortality than the conventional captive delivery system. Although the construction cost is higher, the limit system has a higher profit per nest.
Breeding sows should not be tethered or restricted until the first breeding. Insufficient intensive rearing before the first breeding can lead to large variability in the age of the estrus and puberty, as well as reduced conception rates and litter size.
Other problems with gilts that are tethered or limited include irritability, neck ulcers, limb problems, and difficulties in keeping clean. After weaning and re-breeding of first litter pigs, sows can be successfully reared in a single pen.
2. Illumination affects modern domestic pigs originating from wild boars that are sensitive to changes in the length of the aphids. Some producers raise gilts or sows reared outdoors, particularly in the natural conditions of northern latitudes in western Canada. Their pigs show the same summer seasonal infertility as wild boars. Recent studies conducted in Canada and Australia have shown that the mechanism of summer infertility is equally applied to bred sows and sows. Fully reared sows or sows do not necessarily eliminate this potential problem. In breeding sows, recent evidence has shown that long daytime delays puberty. It is now recommended that the light should be 10 hours a day, which is not easy and much less.
Recent experiments at the University of Alberta have shown that shortening the daytime lighting of the pigsty will increase the reproductive performance of the gilts. The same effect of light is also seen in sows. If breeder herds are kept in the house for a long time, the amount of light they receive should be controlled. Install a simple clock to ensure 10 hours of light per day and 14 hours of darkness. You can use natural sunlight (window) with artificial lighting or complete artificial lighting to meet these requirements. The light intensity is maintained between 150-200 lux by installing a 100 watt light bulb every 4 meters or by installing a row of fluorescent tubes directly over the pig.
3. Temperature affecting the high temperature during mating is obviously harmful to conception rate, litter size at weaning and weaning weight. Heat stress prior to mating and during the first few days of pregnancy is more detrimental to the presence of embryos than heat stress after the implantation. Therefore, when mating in very hot weather, it is recommended that you provide shading or watering to keep the sow cool. Whenever possible, breed early or late in the evening.
4. The length of weaning at weaning is a very important decision you must make. The length of lactation has a significant effect on the number of litters per sow. Most producers perform piglet weaning between the ages of 4-6 weeks, but they have been tested during the 0-56 days of lactation. In theory, a shorter period of lactation should result in more litters per year. However, in practice, the benefits of a short lactation period are less obvious. As the length of the lactation shortens, the sow must begin to return to heat for a longer period of time. A more serious consequence of a short lactation period is the effect on the conception rate and the number of litters. Shorter than 10 days of lactation resulted in a decrease of 1 or 2 in the rate of low conception and birth. Based on the number of weaned piglets per sow per year, feed consumption of sows, and growth rate of piglets, weaning at 3–5 weeks of age can achieve maximum production efficiency.
5. Changing the lactation pattern The fact that estrus does not occur during lactation of sows is mainly due to piglets' milk stimulation. Weaning eliminates this irritation and acts like unwrapping the sow's hormone switch, causing the sow to start estrus. The sows that did not return to normal estrus in time after weaning failed due to a part of their switching mechanism. North Carolina State University studied ways to enhance hormonal signals at weaning by altering normal feeding patterns. Reducing milk stimulation in an appropriate manner can promote the secretion of hormones that cause estrus in sows.
One trial was to wean the heavier half litter piglets a few days earlier than the lighter half litter piglets and interrupt the normal lactation pattern. Experiments have shown that the performance of first-born white and large-white hybrid sows re-maturing is compared with that of conventional weaned sows. Heavier half-sitter pigs of these hybrid sows are weaned for 2 to 5 days earlier than the lighter half. The results show that changing the breastfeeding pattern can indeed cause the sows to quickly begin to heat.
This weaning method can be used to reduce sows that are eliminated due to inability to breed. This means that fewer gilts will be needed and the delivery schedule will be easier to maintain.
Another benefit of early weaning in large piglets is that in the two days that smaller piglets can stay longer, their weight gain is faster than conventionally weaned smaller piglets. Feeding sows a few extra days can also make smaller piglets grow better during the conservation period. Early weaning of heavier pigs is also more uniform in the nursery period.
6. Pregnancy examination It is still difficult to observe whether the sow is pregnant or not until the eighth week after the test. Since 25% of the sows in a herd may not be pregnant during the first breeding, sows should be checked daily for regrowth between the 19th and the 26th day after mating. Although this is an assumed time, it is not completely reliable, but this practice will detect that many sows have no conception and must be restocked. Manufacturers now have several methods of ultrasound examination of pregnancy, which provides a more reliable means of detecting pregnancy.

Concentrated wolfberry juice selection Ningxia Zhong Ning wolfberry fruit as raw material, the Yellow River water purification extraction, the world's advanced production equipment and processing technology from processing. Lycium bright color, nutrient-rich, with multiple health effects, the role and efficacy of medlar As early as the Ming Dynasty, Li Shizhen's "Compendium of Materia Medica" there are records; and Chinese medicine is also commonly used to treat liver and kidney yin deficiency, waist and knees sore , Dizziness, forgetfulness, dizziness, eyes fainting, diabetes and other illnesses. Often take with longevity, the effect of anti-aging, but also the preparation of a variety of health drinks, dairy products, cold drinks and medicines the first raw material

Please feel free to leave us message.
Any inquiry would be replied within 2 hours on working days!

 Production Specification Sheet

Concentrated Goji Juice

Concentrated Goji Juice ,Concentrated Wolfberry Juice,Concentrated Goji Berry Juice

Ningxia Wolfberry Goji Industry Co.,ltd , https://www.nx-wolfberry.com