Pig breeding is a key technical link in pig production. The reproduction rate is reflected in the number of fetuses per year, the number of births and the survival rate of piglets. In recent years, Jinxing Pig Farm of Guangdong Province has paid attention to sow breeding and transformation, scientific management and breeding techniques of breeding pigs, disease prevention of sows, early weaning of piglets, etc., and actively used advanced technologies from other regions. Combining with actual production, a set of comprehensive breeding techniques for multiple high-yielding sows was concluded. Through the promotion and application of this comprehensive technology, the annual output of parity, number of births, and survival rate of piglets reached an average of 212, 118, and 9506%, respectively, and achieved good social benefits and significant economic benefits. The comprehensive technology is introduced as follows:
First, breeding and transformation of sows
Good breeds are the key to improving the productivity of herds. To make sows achieve high yields in multiple births, good breeders must be selected. At present, the sow we selected was a binary cross sow produced by Yorkshire (female) Landrace (mother), and Duroc was used as a terminal parent to produce Du Dachang pure three-way hybrid pigs. The cultivation of gilts requires multiple screening and retention from sow body appearance, litter size, and production levels. The gilts should exercise regularly and be fed with empty sows. They should be mated when they are 7-8 months old and weigh about 100 kg.
Second, scientific feeding management and breeding technology
(I) Breeding pig management
1, empty sow management. Empty sows should be fed empty sow feeds and adjusted at any time based on their production status to control the sows to be in moderation. Sow 4-5 days after weaning should pay special attention to observation and find that estrus should be bred in time. If necessary, use a boar to try or push the boar out of the sow to promote estrus.
2, the management of pregnant sows. Pregnant sows should pay attention to the protection of the fetus, 9-13 days after mating, 60-70 days, 20 days before the birth of these three stages is the peak period of embryonic death, should pay special attention to protection. The hot weather from June to September can be sprayed with water to prevent stillbirth, miscarriage and death. The sows were fed 3 to 4 weeks before the start of feeding and were fed with sow feed. The daily feed amount is adjusted according to the status of the sow. Pregnancy sows should be injected with E. coli quadruple projected vaccines 2 weeks before childbirth to increase the birth weight and immunity of the piglets and prevent the newborn pigs from crouching.
3, feeding and nursing sows. Managing childbirth and lactating sows requires the cooperation of “fine, fine, and diligent†work, and takes care of the piglets just like taking care of their own children. When the sow is to be delivered, she must be handed over by the special person to give birth. The newborn piglet should wipe off the body's fetal membrane and dry the body's amniotic fluid in time, and then put it into the heat preservation tank (box). After the sow is finished, put the piglet back to sucking. The colostrum is fixed with a teat. After the piglet is full, it is put into a heat preservation tank (box). The milk is fed every 1-2 hours, and the circulation is repeated for 2-3 days. Dystocia was found to produce artificial midwifery in a timely manner, and artificially resuscitated piglets were discovered in time. The piglets that had a prolificacy (ie, more than the number of nipples) were promptly fostered. The sow should be provided with sufficient drinking water, and the sow should be allowed to get up and drinking regularly to prevent constipation. In order to prevent sow mastitis or the absence of milk disease, the sows were started to reduce their feed intake 2 days before delivery, and only a small amount of soup was fed on the day of delivery, and the amount of feed was gradually increased after 1-2 days. Lactating sows feed lactating sows for free feeding. Nursing sows are guaranteed to be fresh and the ingredients and formula are relatively fixed. Lactating sows have a lactation period of 28-30 days.
4. Feed the sows using a combination of dry and wet materials. The combination of wet and dry feed sows can maintain proper lyricism. Feeding wet material on hot days can improve sow feed intake.
5, breeding and management of boars. The boars are required to exercise and feed the same material as the nursing sows. They are fed with fresh eggs during the breeding period. The boars are required to wash the pigs daily and cool water during the June-September hot season. The pig cannot be washed immediately after mating.
6. Reasonably eliminate breeding pigs. The pig farm should insist that the proportion of eliminated sows is 20-25% per year. There is no treatment value after illness, weaning after three periods of weaning, two or more consecutive miscarriages, three consecutive times or four relapses, two sows with fewer than eight consecutive litters and four or more sows. Should be eliminated in time. The gilts that are not bred for more than 10 months of age are also to be eliminated.
(B) breeding technology
1, male and female pigs ratio. If natural mating is adopted, the ratio of male to female sows in breeding herds is 1:20-25. Boars should be used reasonably according to age. Semen should be inspected regularly and found to be unqualified and should be immediately discontinued.
2, estrus sow's judgment. After the estrus, the sow, redness of the vulva just began to subside, there is mucus outflow, hand sow hindquarters stand still, this time the most suitable breeding.
3, a reasonable choice. Use repeated breeding or artificial insemination. When mating, it is necessary to select a suitable breed and weigh the advantages and disadvantages of the male and female pigs to artificially match, consolidate the advantages, overcome the shortcomings, and ensure that the old and the young sows are mated with young boars. After sowing, the sow should always observe and find that the estrus is compounded in time.
4. Utilization of hybrid boars. It has been proved that the hybrid boar has a strong sexual desire and a large amount of ejaculate. Using it as a terminal male parent can improve the conception rate and the number of births of the sows.
5. Do you comprehensively regulate the reproductive ability of sows and boars? Use "Yimuwang" to comprehensively regulate the secretion of endogenous hormones in sows to increase sow reproductive performance, increase lactation, and improve milk quality. Use "Raptor" to comprehensively adjust reproductive performance of boars and increase sperm count and quality.
YELLOW COLOR VACUMMN FRESH WAXY CORN FOR HUMAN EATTING , SWEET CORN PLANTED IN INNER MONGOLIA CHINA.
VACUMMN FRESH WAXY CORN FOR HUMAN EATTING
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