Efficient utilization of breeding pigs

The length of breeding period and reproductive performance of breeding pigs are related to breed type, feed type, nutrition level, management measures and utilization intensity. The reproductive performance of young breeding pigs continued to improve after they began to breed. When they reached the age of 2 ~ 3 years old, the fecundity was the highest. After that, the sexual function gradually decreased with the increase of age, until sexual failure. Modern pig production generally implements the balanced production of pigs throughout the year, commercial pigs listed in batches, talking about cost accounting, seeking the best economic benefits, is the era of asking pigs for money and meat. Therefore, in the aspect of reproduction, we should grasp the best stage of reproduction, make use of intensity, and should be eliminated in time when the performance of reproduction decreases. Breeding pigs the advantages of young and middle-aged breeding pigs are as follows: breeding boars aged 1 ~ 3 years old have strong libido, fast sexual reflex, good semen quality, high conception rate, flexible body, strong limbs and less limb and hoof disease. the estrus of 1 ~ 6 births of young and middle-aged sows is obvious, the conception rate is high, the number of offspring is large and strong, and the pigs have strong vitality, rapid growth and development, high serial reproduction and strong feeding ability of sows. The disadvantage of old breeding pigs is the decline in fecundity. Old boars have poor libido, slow sexual reflex, heavy and bulky (large breeds can reach more than 3504 kg), inflexible limbs are often accompanied by foot-and-limb disease, and poor breeding ability. Although the number of offspring of old sows is many, but the feeding ability is poor, there are often individuals with little or no milk, and the body is big, heavy and easy to trample on the pigs, and the abdominal muscles are relaxed. when lying on the side, the 2-3 nipples in the lower row are difficult to expose, without artificial help, it is difficult for newborn pigs to get milk. In addition, the offspring of old breeding pigs have poor living ability, slow growth and development, and often have bad offspring due to gene mutation. Problems in the utilization of breeding pigs in modern pig production, young and middle-aged breeding pigs are mostly used in modern pig production. Generally, breeding boars use 2 ~ 3 years, breeding sows use 5 ~ 6 births, and individuals with good reproductive performance can use 7 ~ 8 births. In this way, the proportion of elimination and renewal of breeding pigs is relatively large, and most of them are kept between 25% and 35%. Therefore, the breeding cost of reserve breeding pigs will be increased, and the production performance of pig herds will be affected due to the increase of the proportion of 1-2 sows in sows. The solution is to obtain the breeding cost of reserve breeding pigs from the improvement of overall economic benefits, strengthen the cultivation of reserve breeding pigs, improve the fecundity of 1 ~ 2 births of sows, and take comprehensive technical measures to improve the production level of raising pigs and make good use of breeding pigs. -- Thank you for sharing.