The number of non-productive days, that is, the number of non-pregnant and non-lactating days of the breeding sow during the year, mainly includes the days when the gilts were mated, 230 days or more, the number of days from sow weaning to breeding intervals exceeded 6 days, and the number of days The days of sow loss are generally 21 days, the number of days lost to an aborted sow, the number of days lost to an empty sow, and the number of days lost to a breeding pig. The non-production days are the most critical indicators affecting the production efficiency of the breeding herd. The increase in the number of days of non-production of sows will affect the number of litters in pigs, the number of litters weaned and the number of pigs slaughtered each year. At the same time, feed costs, management costs, and the cost of breeding pigs will increase accordingly, directly affecting the farms. The economic benefits. The author introduced how to effectively reduce the non-productive days of sows from the following points.
1. Guarantee utilization of gilts
The gilts must be bred in time and should be introduced into the production group in about 180 days, and the materials should be replaced with professional gilts. The estrus should be carefully recorded on the day of transfer to the production group, so that the estrus time of the gilts can be known, and the third estrus time of the gilts can be inferred to ensure the best breeding time.
2. Shorten weaning to match intervals
First of all, the weaning piglets must be weaned in a timely manner to save time and allow the sows to enter the next breeding cycle as soon as possible. To ensure that sows are able to estrus as soon as possible after weaning, sows should be kept in the best possible condition, that is, they must not lose too much weight during lactation. This requires sows to achieve maximum feed intake during lactation and can be meticulously fed. Manage, provide adequate drinking water, and improve the environment to increase feed intake. Weaning to the next breeding period should take a short period of good feeding aphrodisiac, give the sow enough nutrients to stimulate its oestrus ovulation. For sows that are not oestrus for more than 10 days after weaning, the use of PG600 and other drugs for aphrodisiac is one of the ways to reduce non-productive days. You can also strengthen the sow's movements, boar stimuli, etc. to stimulate their estrus.
3. Ensure effective breeding work and semen quality
The work of checking the situation must be meticulous, strictly in accordance with the operating rules of the farm, and at the same time mimicking the physiological characteristics of the boar as much as possible during the breeding period, and maximizing the stimulation of the sow. At the same time, we must ensure the quality of semen in breeding boars to ensure sperm viability and semen density, so as to ensure a higher rate of sows mating, reduce returns, and increase the number of yields. Insemination workers should ensure the standardization of artificial insemination operations, improve the accuracy of breeding, and reduce the return rate.
4. Find regrowth and abortion sows in time
The post-matching sow's situation is used as a daily routine. Especially for sows with 18-23 days after sowing, let an adult boar make full nose contact with the sows in the area, and be sure to allow enough time and patience in this work so as not to miss the return of pigs. The period of love. After 23-30 days of sows to be equipped with B-pregnancy test, for empty sows to be treated in time. Pay attention to the sow's living environment. If it is a captive, it is necessary to pay attention to the captive density and reduce the chance of the pig fighting. Be careful when catching pigs. Do not drive or fight. Pay attention to observe the daily physiological changes of pregnant pigs, strengthen feeding and management, can not feed feed contaminated with mycotoxins, reduce the possibility of abortion.
5. Timely elimination of unsatisfactory sows
Determined to phase out in time to ensure a reasonable update rate for the herd. Normally, weaning after weaning is the most economical, but should be promptly eliminated when there are: if the gilts do not have estrus symptoms above 300 days of age, and the number of days after weaning exceeds 45 days, abortion For two or more sows, the average of two consecutive fetuses was less than eight, and six or more litters, and two sows were continuously nursing eight or less.
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