Technical Measures for Improving the Continuous High-yielding Performance of Sow Sows

Core Tip: Domestic lean-type sows have poor performance in continuous high-yield production, mainly because the sows are too thin at weaning and are not estrused for a long time after weaning. See below for measures to achieve an ideal continuous production.

It has been observed that the continuous high-yield performance of several famous lean-type sows imported from abroad is worse than domestic varieties. The main reason for this is that the sows are too thin at weaning and are not estrused for a long time after weaning. Over the years, the relevant departments have conducted explorations to improve the continuous production performance and achieved a more satisfactory continuous production effect. The specific practices are described as follows:

Solve the lean pregnancy sows. According to the sows have different birth times, body conditions are not the same treatment. For the 1-2 young sows produced, the “straight line” method is used to meet the nutritional requirements for the growth and development of the sows in addition to the nutrients required for the normal development of the fetus, uterus, and breast. For sows that have passed more than 3 births, adopt a “high-low-high” method to allow some sows that have undergone labor and breastfeeding and consume large amounts of energy to fully satisfy their 40-day pre-, mid-, and post-natal days. Left and right nutritional needs in different stages. For sows whose body condition is still better when estrus and mating, adopt the method of “low before and after high”. This will make it possible for the entire sow population to maintain a good body condition and lay a good foundation for childbirth.

Keeping the weaned sows in good condition without being thin or fat. During the lactation period from birth to weaning, the sow’s body weight will be reduced to varying degrees, generally weighing 30 kg to 40 kg or more compared with the time of labor. The more piglets there are, the more pronounced the weight loss of sows. Therefore, we started from early breast-feeding and fully strengthened the feeding. We can basically maintain the balance between the weight loss during the lactation period and the weight gain during pregnancy. We always maintain a good body condition. Most of the piglets can be used after 10 days of weaning. Estrous breeding, to create a better condition for the continuous production performance.

Feeding piglets early, properly weaning in advance, shortening the period of lactation, increasing rejuvenation, and promoting early estrus. The piglets were 7 days old and 10 days old and were given the “suckling pig full price pellets”. The milk and feed materials were taken in half before and after 21 days of age, and were weaned at 35 days and 42 days of age. During the lactation period, it is very important to pay attention to observing the weight change of the sow at any time. Special care is given to individual lean sows. Specific methods: First, increase the amount of feed properly, second, continue feeding after lactation feed material, and third, feed green feed. These “small stove” feeds have a significant effect on stimulating endocrine secretion, improving reproductive system activity and reducing the above-mentioned several kinds of interference, and improving the continuous production performance.

For sows whose individual causes of piglet death are all “fat and fat”, the ovaries and other reproductive organs are embedded with fat, and the ovulation of sows is reduced, or infertility is repeated, affecting continuation performance. To quickly adopt lower nutrient levels or limited feeding, as soon as possible to reduce paralysis in order to facilitate the heat.

The opposite sex stimuli and rearing. For sows that are in good condition but not in heat, they can be placed in boars to allow them to be tempted. It can also be raised in the same circle as the estrus's sow, which can cause the sow's central nervous system to excite and adjust the endocrine, so that the sow can be estrused and mated within 7 days.

"Triad hormone" aphrodisiac. For sows whose condition is still good for more than 10 days after weaning, sows with three hormones can be used to sow about 150 kg of sow and intramuscular injection of triad hormone 4 ml to 8 ml (with testosterone propionate 25 mg/ml). Progesterone 12.5 mg, butyl estradiol 1.5 mg). Generally 3 days to 5 days after treatment can be estrus. The combination of sperm and egg is not in the free state before implantation, and it is easier to abortion. In addition to its aphrodisiac effects, the triad hormone also has the effect of protecting the fetus and protecting the uterus, reducing the uterine tone and reducing the secretion of milk, and has a good preventive effect on aura, habitual abortion and sow mastitis. At the same time, we must prevent and treat reproductive system diseases. Such as metritis, vaginitis, salpingitis, follicular cysts, etc., have a direct impact on estrus, breeding and abortion.

Observe the estrus performance carefully. Exogenous sows showed no obvious estrus in the initial and secondary production. Careful attention should be paid to the estrus. The estrus should be bred in due course and repeated breeding to increase the conception rate and the number of litters. Special attention should be paid to whether or not the sows are "back-in-flight" during the period from 18 days to 21 days after mating, so that they can be supplemented in time to improve the continuation performance.

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