1. Choose sows
2. Grasp the appropriate initial age and useful life
It is not appropriate for sows to have early mating ages. Under normal circumstances, the local sows are 7-8 months old and have a weight of 80 kg or more. The introduced species are 8-10 months old and the weight is 100-120 kg.
3. Control the sow's sorrow
The sows should not be over-fed and not overly skinny before they are allowed to breed. The estrus control is best at 7-80%, so that the fertility rate of the mating species is high and the litter size is higher.
4. Short-term excellent feeding before sow mating
In the 10 days before mating, increasing the feed intake of the sow properly can stimulate multiple ovulation of the sow; the amount of feed will be reduced to normal level immediately after the breeding.
5. Timely breeding
According to the sow’s age, the principles of “early matching, early dispensing, and not being old†should be followed and sow compounding techniques should be adopted.
6. Do a good job of matching male and female pigs
We should avoid the breeding of male and female sows with relatively close relatives. According to the ages of male and female pigs, it is advisable to use “old boars with young sows, young boars with old sows, and young boars with strong sowsâ€. The principle of matching.
7. Increase the number of sows ovulated by drugs
The maternal injection of 500-1500 IU maternal serum gonadotropin during estrus can increase the number of sows ovulated, increase the conception rate, and increase litter size.
9. Strengthening rearing management of pregnant sows
Sows should feed feeds rich in protein and vitamins in the early pregnancy, mix green feeds appropriately, diversify feeds to meet sow nutritional needs, and prevent falls and fights from causing miscarriage; Feeding, proper exercise, to prevent excessive body fat; 3 months after pregnancy, should increase the fine material, reduce coarse material and make up for calcium and phosphorus, feed should be appropriately reduced before labor.
Hearing aid manufacturers strive to optimize their wireless hearing aid offerings both in terms of connection reliability as well as power efficiency. Variance across patients and listening conditions can make optimizing wireless hearing aid systems a complex process.
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