Understanding the rules of estrus in sows and breeding them in the most suitable time period can improve the production efficiency of sows. The sows are best to be bred in April-May, until September-October, with repeated breeding, so that the sows can be bred in spring and autumn to avoid cold and hot weather. The estrus cycle is 16-25 days with an average of 21 days. The gilts are estrus at about 150-170 days of age, and the sow is estrus 3-10 days after weaning.
Estrus performance
The sows showed excitement, sensitivity to the surrounding environment, a significant drop in feed intake, slight swelling in the genitals, and a more pronounced performance of the first-born sows than the sows. The sow attempted to climb across other sows. The genital area was markedly red and swollen. Visible sticky secretions were seen. The sows were standing still when the other sow was climbing and both ears were erect. This was the initial performance of the sow.
After 19 to 30 hours after the estrus, the swollen area of ​​the vulva began to subside, and a filiform mucus flowed out. When the sow's hindquarters were pressed, the sows would remain immobile, and breeding should be done at the right time. Precocious sows should be bred at 7-8 months of age and weighing more than 100 kg. Sows usually begin ovulation 36 to 40 hours after estrus, so sows are required to be escorted 3-4 times in estrus, 12-24 hours apart.
Timely breeding and artificial insemination
Sows are only allowed to breed boars during the estrus period. For sows and gilts that are already bred, the estrus is checked every morning and evening. For sows that have been bred, special attention should be paid to checking whether they return to the animals after 18-24 days and 38-44 days after breeding. Once the estrus and regrowth sows are found, they should strive for timely breeding.
The estrus sow should be bred or inseminated twice during the estrus duration. For the first time, when the pig's back has no standing reaction in the morning, it will be inseminated or inseminated once in the afternoon of the same day, and will be bred or inseminated one time in the morning. When there is a standing reaction in the back of the pig in the afternoon, it will be bred on the next morning or Insemination once in the afternoon or insemination.
It is necessary to use double matching (that is, the first time when there is a waiting response and the second time after 12 hours), which can significantly increase the fertility rate and litter size of sows. If artificial insemination technology is used, semen of healthy boars should be used. Each milliliter of semen needs more than 40 million sperms, and sperm motility is above 0.6. The equipment should be strictly disinfected and the second insemination should be performed 12 hours after the first insemination.
Virus Specimen Collection Tube
Inspection principle:
It can perform protein denaturation on fresh clinical virus samples to inactivate the virus, prevent secondary transmission of infection, and ensure the safety of transportation and testing personnel.
♣.Structural composition: Combination of cotton swab and transport medium (VTM).
♣. Product requirements:
The product should be airtight, avoid high temperature, avoid direct sunlight storage. It should be used in a clean, hygienic, pollution-free, and temperature-friendly environment.
♣, Storage conditions and validity period:
â‘ , the product should be stored in a clean, dry and ventilated environment,
②, the temperature is 5℃-35℃;
â‘¢, relative humidity <85%RH;
â‘£, product shelf life: 12 months.
♣. How to use
â‘ Before sampling, mark relevant information on the label of the sampling tube.
â‘¡. Sampling with the corresponding cotton swabs.
â‘¢ After the collection is completed, quickly put the cotton swab into the collection tube, break the part higher than the sampling tube, and tighten the tube cover.
â‘£. For the specific sampling method, please refer to the following:
a) Nasal swab Gently insert the sampling head into the nasal cavity, stop for a while and then slowly rotate to exit, immerse the collected specimen in the Xiangxiang solution, break the excess part and discard it, and tighten the sampling tube cover.
b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with the sampling head, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
c), Mycoplasma Chlamydia, Ureaplasma specimen collection
Male: Insert the sampling head into the urethra about 2cm and rotate, stay for a while and then exit, and immerse the collected specimen in the sampling solution.
Female: Wipe the mucus of the cervical orifice, insert the sampling tip into the cervical canal for 1-2 cm for sampling, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
♣. Precautions
1. After the virus is collected, the disposable sampling swab should be completely inserted into the preservation solution, so that the virus can be retained to the greatest extent possible.
â‘¡ The collected specimens must be sent for inspection in time.
â‘¢. It is forbidden to use products with damaged packaging and expired validity period to prevent pollution.
This single-use Virus Sampling Tube is used for in vitro diagnosis. It cannot be used for human or animal oral or external use. If swallowed, it may cause serious events; it is irritating to eyes and skin. If it is not splashed into the eyes, rinse with water.
Virus Sampling Tube,Virus Specimen Collection Tube,Viral Transport Tube,Saliva Virus Sampling Kit
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